8.spring boot 事务配置

1. 增加@EnableTransactionManagement注解

package com.yunchuang;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@SpringBootApplication
@EnableScheduling
@ServletComponentScan
@EnableTransactionManagement
public class YunchuangApplication {

    public static void main(String[] args) {
        SpringApplication.run(YunchuangApplication.class, args);
    }
}

2.在service的实现类或者方法上添加下面这个注解即可.事务管理器的配置在多数据源那篇里已经配置过了.默认情况下只有RuntimeException才回滚,为了让Exception也回滚,增加了 rollbackFor = Exception.class.

@Transactional(value = "masterTransactionManager", isolation = Isolation.DEFAULT, propagation = Propagation.REQUIRED, rollbackFor = Exception.class)

3.测试:
在service里添加一个方法,controller里添加一个方法,访问这个方法,可以发现,数据没有插入成功.

    @Override
    public void addTest() throws Exception {
        Leave leave = new Leave();
        leave.setDepartment("事务部门4");
        leave.setName("事姓名4");
        leaveDao.add(leave);
        if (leaveDao.loadById(3727) != null) {
            throw new Exception("事务异常4");
        }
    }

    @GetMapping("/test")
    @ResponseBody
    public String test() throws Exception {
        leaveService.addTest();
        return "123";
    }