7、SpringBoot2之整合事务及AOP
本文在SpringBoot2之整合Mybatis的基础上进行7.1、整合事务
7.1.1、mapper接口
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225103829549-1358013069.png
int deleteEmployeeById(int id);7.1.2、mapper映射文件
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225102951297-622923019.png
<delete id="deleteEmployeeById" parameterType="int">
delete from t_emp where emp_id = #{id}
</delete>7.1.3、业务层接口及实现类
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225104837065-249785125.png
package online.liaojy.service;
/**
* @author liaojy
* @date 2023/12/25 - 6:31
*/
public interface EmployeeService {
int deleteEmployeeById(int id);
}https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225113523236-723005239.png
注意：只要引入 spring-boot-starter-jdbc 启动器（详见6.1节），spring boot 便会自动配置好 DataSourceTransactionManager ；
因此，只需在方法（或者类）加上 @Transactional 注解，即可进行事务管理。
package online.liaojy.service.impl;
import online.liaojy.mapper.EmployeeMapper;
import online.liaojy.service.EmployeeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
/**
* @author liaojy
* @date 2023/12/25 - 6:33
*/
@Service
public class EmployeeServiceImpl implements EmployeeService {
@Autowired
private EmployeeMapper employeeMapper;
@Transactional
@Override
public int deleteEmployeeById(int id) {
// 删除一条数据
int rowsOfDelete = employeeMapper.deleteEmployeeById(id);
System.out.println("已成功删除"+rowsOfDelete+"行数据");
// 制造一个异常
int i = 1/0;
return rowsOfDelete;
}
}7.1.4、控制层方法
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225105757774-174251661.png
@Autowired
private EmployeeService employeeService;
@RequestMapping("/deleteEmployeeById")
public String deleteEmployeeById(){
int i = employeeService.deleteEmployeeById(26);
return "删除成功";
}7.1.5、测试效果
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225110845168-99647847.png
测试前的数据
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225111544099-1017664312.png
测试时发生异常
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225111628209-338062693.png
测试后的数据没变化，说明事务回滚功能正常
7.2、整合AOP
7.2.1、导入AOP启动器依赖
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225115018560-1830461223.png
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>7.2.2、创建切面类
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225120250264-1319883502.png
package online.liaojy.advice;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
/**
* @author liaojy
* @date 2023/12/25 - 6:51
*/
@Component
@Aspect
@Order(5)
public class LogAdvice {
@Before("execution(* online.liaojy.service.*.*.*(..))")
public void beforeLog(JoinPoint joinPoint){
// 获取连接点所对应目标方法所在类的名称
String className = joinPoint.getSignature().getClass().getSimpleName();
// 获取连接点所对应目标方法的名称
String methodName = joinPoint.getSignature().getName();
System.out.println(className+"类的"+methodName+"方法开始执行了！");
}
}7.2.3、测试效果
https://img2023.cnblogs.com/blog/2052479/202312/2052479-20231225120452845-1284754165.png
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