SSM— spring,springMVC,mybatis整合
媒介SSM整合重要是将mybatis交给spring管理;将spring容器交给tomcat启动;对于web的请求和访问交给springmvc处置惩罚
没啥好说的,重要是配置文件
依赖
<dependencies>
<!--测试依赖2个-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.3.23</version>
</dependency>
<!--工具依赖2个-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.30</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.36</version>
</dependency>
<!--web相关依赖5个-->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.25</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
<version>2.14.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.15.2</version>
</dependency>
<!--数据库依赖-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.33</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.21</version>
</dependency>
<!--mybatis相关依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.6</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.7</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.12.RELEASE</version>
</dependency>
<!--spring-ioc依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.25</version>
</dependency>
<!--分页插件-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.2.1</version>
</dependency>
</dependencies> spring.xml-配置spring和mybatis
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--我们是要通过spring配置文件,完成service层以及Mapper层对象的创建-->
<!--service层的类会在其上添加@Service注解,直接扫包就能创建bean-->
<context:component-scan base-package="com.wngz.ssm.service"/>
<!--创建数据访问层对象之前,必须链接数据库,就要用到数据源,必须知道连接的数据库信息-->
<!--要知道所连接的数据库信息,必须导入数据库配置文件db.properties-->
<context:property-placeholder location="classpath:db.properties"/>
<!--配置druid数据源-->
<bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="username" value="${jdbc.username}"/>
<property name="url" value="${jdbc.url}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!--如何创建Mapper实例呢,需要用到SqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="typeAliasesPackage" value="com.wngz.ssm.entity"/>
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:mappers/*.xml"/>
<property name="configuration">
<bean class="org.apache.ibatis.session.Configuration">
<!-- <property name="logImpl" value="org.apache.ibatis.logging.stdout.StdOutImpl"/>-->
<property name="mapUnderscoreToCamelCase" value="true"/>
</bean>
</property>
<!--配置mybatis插件-->
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">
<property name="properties">
<value>
<!--指定用哪个数据库-->
helperDialect=mysql
<!--是否合理化,当输入的页码大于最大页数时,返回最后一页-->
reasonable=true
<!--当页码为0时,查询全部-->
pageSizeZero=true
</value>
</property>
</bean>
</array>
</property>
</bean>
<!--扫描mapper接口所在的包,使用上面的SqlSessionFactoryBean来创建Mappers接口实例-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.wngz.ssm.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<!--配置事务管理器-->
<!--务必注意,这个DataSourceTransactionManager类的bean,它的id一定要设为transactionManager-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--mysql的事务归根结底还是要使用Connection。所以这里还需要配置数据源-->
<property name="dataSource" ref="dataSource"/>
</bean>
<!--启动事务管理, transaction-->
<tx:annotation-driven/>
</beans> springmvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.wngz.ssm.controller"></context:component-scan>
<!-- 注册springmvc相关注解-->
<mvc:annotation-driven></mvc:annotation-driven>
<!-- 让静态资源文件交给默认servlet处理-->
<mvc:default-servlet-handler></mvc:default-servlet-handler>
</beans> db.properties
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/community?serverTimezone=GMT%2B8
jdbc.username=root
jdbc.password=123456 mappers/*.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.wngz.ssm.mapper.UserInfoMapper">
<!-- mybatis映射文件-->
<select id="selectByName" resultType="com.wngz.ssm.entity.UserInfo">
select id,
username,
password,
type,
remarks,
create_time as createTime,
status
from userinfo
where username = #{username}
and status = 1
</select>
</mapper>
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