论坛 › Java › 《深入明白Mybatis原理》MyBatis事务管理机制

道家人 发表于 2025-1-12 19:10:57

《深入明白Mybatis原理》MyBatis事务管理机制

概述

对数据库的事务而言，应该具有以下几点：创建（create）、提交（commit）、回滚（rollback）、关闭（close）。对应地，MyBatis将事务抽象成了Transaction接口：
https://seven97-blog.oss-cn-hangzhou.aliyuncs.com/imgs/202411301324984.png
MyBatis的事务管理分为两种形式：

[*]使用JDBC的事务管理机制：即使用java.sql.Connection对象完成对事务的提交（commit()）、回滚（rollback()）、关闭（close()）等。
[*]使用MANAGED的事务管理机制：这种机制MyBatis自身不会去实现事务管理，而是让程序的容器如（JBOSS，Weblogic）来实现对事务的管理。
这两者的类图如下所示：
https://seven97-blog.oss-cn-hangzhou.aliyuncs.com/imgs/202411301324045.png
官网关于事务配置的内容

在 MyBatis 中有两种类型的事务管理器（也就是 type=""）：

[*]JDBC – 这个配置直接使用了 JDBC 的提交和回滚设施，它依靠从数据源获得的毗连来管理事务作用域。
[*]MANAGED – 这个配置险些没做什么。它从不提交或回滚一个毗连，而是让容器来管理事务的整个生命周期（好比 JEE 应用服务器的上下文）。 默认情况下它会关闭毗连。然而一些容器并不希望毗连被关闭，因此需要将 closeConnection 属性设置为 false 来制止默认的关闭行为。比方:
<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>如果你正在使用 Spring + MyBatis，则没有须要配置事务管理器，因为 Spring 模块会使用自带的管理器来覆盖前面的配置。
这两种事务管理器类型都不需要设置任何属性。它们其实是类型别名，换句话说，你可以用 TransactionFactory 接口实现类的全限定名或类型别名代替它们。
public interface TransactionFactory {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>default void setProperties(Properties props) { // 从 3.5.2 开始，该方法为默认方法<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// 空实现<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>Transaction newTransaction(Connection conn);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>Transaction newTransaction(DataSource dataSource, TransactionIsolationLevel level, boolean autoCommit);}在事务管理器实例化后，所有在 XML 中配置的属性将会被传递给 setProperties() 方法。你的实现还需要创建一个 Transaction 接口的实现类，这个接口也很简朴：
public interface Transaction {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>Connection getConnection() throws SQLException;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>void commit() throws SQLException;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>void rollback() throws SQLException;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>void close() throws SQLException;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>Integer getTimeout() throws SQLException;}使用这两个接口，你可以完全自定义 MyBatis 对事务的处理。
事务的配置、创建和使用

事务的配置

我们在使用MyBatis时，一般会在MyBatisXML配置文件中定义类似如下的信息：
https://seven97-blog.oss-cn-hangzhou.aliyuncs.com/imgs/202411301324511.png
节点定义了毗连某个数据库的信息，其子节点 的type 会决定我们用什么类型的事务管理机制。
事务工厂的创建

MyBatis事务的创建是交给TransactionFactory 事务工厂来创建的，如果我们将的type 配置为"JDBC",那么，在MyBatis初始化解析 节点时，会根据type="JDBC"创建一个JdbcTransactionFactory工厂，其源码如下：
/**<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* 解析节点，创建对应的TransactionFactory<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @param context<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @return<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @throws Exception<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*/<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>private TransactionFactory transactionManagerElement(XNode context) throws Exception {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (context != null) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>String type = context.getStringAttribute("type");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>Properties props = context.getChildrenAsProperties();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>/*<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* 在Configuration初始化的时候，会通过以下语句，给JDBC和MANAGED对应的工厂类<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* typeAliasRegistry.registerAlias("JDBC", JdbcTransactionFactory.class);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* typeAliasRegistry.registerAlias("MANAGED", ManagedTransactionFactory.class);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* 下述的resolveClass(type).newInstance()会创建对应的工厂实例<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*/<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>TransactionFactory factory = (TransactionFactory) resolveClass(type).newInstance();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>factory.setProperties(props);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>return factory;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>throw new BuilderException("Environment declaration requires a TransactionFactory.");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>如上述代码所示，如果type = "JDBC",则MyBatis会创建一个JdbcTransactionFactory.class 实例；如果type="MANAGED"，则MyBatis会创建一个MangedTransactionFactory.class实例。
MyBatis对节点的解析会生成TransactionFactory实例；而对解析会生成datasouce实例，作为节点，会根据TransactionFactory和DataSource实例创建一个Environment对象，代码如下所示：
private void environmentsElement(XNode context) throws Exception {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (context != null) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (environment == null) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>environment = context.getStringAttribute("default");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>for (XNode child : context.getChildren()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>String id = child.getStringAttribute("id");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>//是和默认的环境相同时，解析之<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (isSpecifiedEnvironment(id)) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>//1.解析节点，决定创建什么类型的TransactionFactory<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>TransactionFactory txFactory = transactionManagerElement(child.evalNode("transactionManager"));<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>//2. 创建dataSource<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>DataSourceFactory dsFactory = dataSourceElement(child.evalNode("dataSource"));<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>DataSource dataSource = dsFactory.getDataSource();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>//3. 使用了Environment内置的构造器Builder，传递id 事务工厂TransactionFactory和数据源DataSource<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>Environment.Builder environmentBuilder = new Environment.Builder(id)<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>.transactionFactory(txFactory)<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>.dataSource(dataSource);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>configuration.setEnvironment(environmentBuilder.build());<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>Environment表示着一个数据库的毗连，生成后的Environment对象会被设置到Configuration实例中，以供后续的使用。
https://seven97-blog.oss-cn-hangzhou.aliyuncs.com/imgs/202404291754352.png
上述一直在讲事务工厂TransactionFactory来创建的Transaction，现在让我们看一下MyBatis中的TransactionFactory的定义吧。
事务工厂TransactionFactory

事务工厂Transaction定义了创建Transaction的两个方法：一个是通过指定的Connection对象创建Transaction，另外是通过数据源DataSource来创建Transaction。与JDBC 和MANAGED两种Transaction相对应，TransactionFactory有两个对应的实现的子类：
https://seven97-blog.oss-cn-hangzhou.aliyuncs.com/imgs/202411301325563.png
事务Transaction的创建

通过事务工厂TransactionFactory很容易获取到Transaction对象实例。我们以JdbcTransaction为例，看一下JdbcTransactionFactory是怎样生成JdbcTransaction的，代码如下：
public class JdbcTransactionFactory implements TransactionFactory {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public void setProperties(Properties props) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> /**<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* 根据给定的数据库毗连Connection创建Transaction<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @param conn Existing database connection<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @return<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*/<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>public Transaction newTransaction(Connection conn) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>return new JdbcTransaction(conn);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> /**<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* 根据DataSource、隔离级别和是否主动提交创建Transacion<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @param ds<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @param level Desired isolation level<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @param autoCommit Desired autocommit<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @return<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*/<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>public Transaction newTransaction(DataSource ds, TransactionIsolationLevel level, boolean autoCommit) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>return new JdbcTransaction(ds, level, autoCommit);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>如上说是，JdbcTransactionFactory会创建JDBC类型的Transaction，即JdbcTransaction。类似地，ManagedTransactionFactory也会创建ManagedTransaction。下面我们会分别深入JdbcTranaction 和ManagedTransaction，看它们到底是怎样实现事务管理的。
JdbcTransaction

JdbcTransaction直接使用JDBC的提交和回滚事务管理机制。它依靠与从dataSource中取得的毗连connection 来管理transaction 的作用域，connection对象的获取被延迟到调用getConnection()方法。如果autocommit设置为on，开启状态的话，它会忽略commit和rollback。
直观地讲，就是JdbcTransaction是使用的java.sql.Connection 上的commit和rollback功能，JdbcTransaction只是相当于对java.sql.Connection事务处理进行了一次包装（wrapper），Transaction的事务管理都是通过java.sql.Connection实现的。JdbcTransaction的代码实现如下：
public class JdbcTransaction implements Transaction {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> private static final Log log = LogFactory.getLog(JdbcTransaction.class);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> //数据库毗连<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>protected Connection connection;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>//数据源<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>protected DataSource dataSource;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>//隔离级别<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>protected TransactionIsolationLevel level;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>//是否为主动提交<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>protected boolean autoCommmit;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public JdbcTransaction(DataSource ds, TransactionIsolationLevel desiredLevel, boolean desiredAutoCommit) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>dataSource = ds;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>level = desiredLevel;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>autoCommmit = desiredAutoCommit;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public JdbcTransaction(Connection connection) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>this.connection = connection;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public Connection getConnection() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (connection == null) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>openConnection();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>return connection;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> /**<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* commit()功能 使用connection的commit()<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @throws SQLException<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*/<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>public void commit() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (connection != null && !connection.getAutoCommit()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (log.isDebugEnabled()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>log.debug("Committing JDBC Connection [" + connection + "]");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>connection.commit();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> /**<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* rollback()功能 使用connection的rollback()<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @throws SQLException<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*/<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>public void rollback() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (connection != null && !connection.getAutoCommit()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (log.isDebugEnabled()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>log.debug("Rolling back JDBC Connection [" + connection + "]");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>connection.rollback();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> /**<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* close()功能 使用connection的close()<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @throws SQLException<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*/<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>public void close() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (connection != null) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>resetAutoCommit();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (log.isDebugEnabled()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>log.debug("Closing JDBC Connection [" + connection + "]");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>connection.close();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> protected void setDesiredAutoCommit(boolean desiredAutoCommit) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>try {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (connection.getAutoCommit() != desiredAutoCommit) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (log.isDebugEnabled()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>log.debug("Setting autocommit to " + desiredAutoCommit + " on JDBC Connection [" + connection + "]");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>connection.setAutoCommit(desiredAutoCommit);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>} catch (SQLException e) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// Only a very poorly implemented driver would fail here,<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// and there's not much we can do about that.<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>throw new TransactionException("Error configuring AutoCommit.<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>"<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> + "Your driver may not support getAutoCommit() or setAutoCommit(). "<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> + "Requested setting: " + desiredAutoCommit + ".<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>Cause: " + e, e);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> protected void resetAutoCommit() {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>try {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (!connection.getAutoCommit()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// MyBatis does not call commit/rollback on a connection if just selects were performed.<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// Some databases start transactions with select statements<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// and they mandate a commit/rollback before closing the connection.<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// A workaround is setting the autocommit to true before closing the connection.<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// Sybase throws an exception here.<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (log.isDebugEnabled()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>log.debug("Resetting autocommit to true on JDBC Connection [" + connection + "]");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>connection.setAutoCommit(true);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>} catch (SQLException e) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>log.debug("Error resetting autocommit to true "<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> + "before closing the connection.<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>Cause: " + e);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> protected void openConnection() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (log.isDebugEnabled()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>log.debug("Opening JDBC Connection");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>connection = dataSource.getConnection();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (level != null) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>connection.setTransactionIsolation(level.getLevel());<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>setDesiredAutoCommit(autoCommmit);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> }<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>ManagedTransaction

ManagedTransaction让容器来管理事务Transaction的整个生命周期，意思就是说，使用ManagedTransaction的commit和rollback功能不会对事务有任何的影响，它什么都不会做，它将事务管理的权利移交给了容器来实现。看如下Managed的实现代码大家就会一目了然：
/**<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> * 让容器管理事务transaction的整个生命周期<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* connection的获取延迟到getConnection()方法的调用<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* 忽略所有的commit和rollback使用<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* 默认情况下，可以关闭一个毗连connection，也可以配置它不可以关闭一个毗连<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* 让容器来管理transaction的整个生命周期<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>* @see ManagedTransactionFactory<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>*/<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public class ManagedTransaction implements Transaction {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> private static final Log log = LogFactory.getLog(ManagedTransaction.class);<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> private DataSource dataSource;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>private TransactionIsolationLevel level;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>private Connection connection;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>private boolean closeConnection;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public ManagedTransaction(Connection connection, boolean closeConnection) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>this.connection = connection;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>this.closeConnection = closeConnection;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public ManagedTransaction(DataSource ds, TransactionIsolationLevel level, boolean closeConnection) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>this.dataSource = ds;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>this.level = level;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>this.closeConnection = closeConnection;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public Connection getConnection() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (this.connection == null) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>openConnection();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>return this.connection;<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public void commit() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// Does nothing<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public void rollback() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>// Does nothing<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> public void close() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (this.closeConnection && this.connection != null) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (log.isDebugEnabled()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>log.debug("Closing JDBC Connection [" + this.connection + "]");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>this.connection.close();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager> protected void openConnection() throws SQLException {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (log.isDebugEnabled()) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>log.debug("Opening JDBC Connection");<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>this.connection = this.dataSource.getConnection();<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>if (this.level != null) {<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>this.connection.setTransactionIsolation(this.level.getLevel());<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}<transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager><transactionManager type="MANAGED">
<property name="closeConnection" value="false"/>
</transactionManager>}} 注意：如果我们使用MyBatis构建当地程序，即不是WEB程序，若将type设置成"MANAGED"，那么，我们实行的任何update使用，即使我们最后实行了commit使用，数据也不会生存，不会对数据库造成任何影响。因为我们将MyBatis配置成了“MANAGED”，即MyBatis自己不管理事务，而我们又是运行的当地程序，没有事务管理功能，所以对数据库的update使用都是无效的。

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查看完整版本: 《深入明白Mybatis原理》MyBatis事务管理机制