1 事物管理 在service层 在开启事物的方法上添加@Transactional 注解即可
package cn.dingyi.service;import cn.dingyi.dao.UserDao;import cn.dingyi.entity.User;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import java.util.Optional;/** * author:dingyi * time:2019/8/23 0023 11:41 */@Servicepublic class UserService {@Autowired UserDao userDao;@Transactional public void updateName(){//根据id 查询用户信息 Optional<User> byId = userDao.findById(1); User user = byId.get();// 修改名字 user.setName("桃谷绘里香");userDao.save(user); }} 如果springBoot版本是2.0以下 需要 在启动类上添加注解@EnableTransactionManagement一般情况下启动类有两个注解：
package cn.dingyi;import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;/** * author:dingyi * time:2019/8/22 0022 10:44 */@SpringBootApplication@MapperScan(basePackages = "cn.dingyi.mapper")public class DyApplication {public static void main(String[] args) { SpringApplication.run(DyApplication.class,args); }}转载于:https://www.cnblogs.com/dingyi-boss/p/11400470.html
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