spring声明式事务 @Transactional 不回滚的多种情况以及解决方案

//获取连接 
1.Connection con = DriverManager.getConnection()
//开启事务
2.con.setAutoCommit(true/false);
3.执行CRUD
//提交事务/回滚事务 
4. con.commit() / con.rollback();
//关闭连接
5. conn.close();

 @Autowired
    private TransactionalService transactionalService;

    @Autowired
    private UserDao userDao;

    @Autowired
    private JwtUserDao jwtUserDao;

    
    @RequestMapping("/tx")
    public void serviceTX(){
        transactionalService.controllerTX();
    }
    
    @Transactional(rollbackFor = Exception.class)
    @RequestMapping("/ctx2")
    public void cTX2(){
        userDao.update();
        System.out.println(2/0);
        jwtUserDao.update();
    }

 
    @Transactional(rollbackFor = Exception.class)
    @RequestMapping("/ctx2")
    public void cTX2(){
        userDao.update();
         //手动抛出一个RuntimeException
        System.out.println(2/0);
        jwtUserDao.update();
    }

 @Autowired
    private UserDao userDao;

    @Autowired
    private  JwtUserDao  jwtUserDao;

    @Transactional(rollbackFor = Exception.class)
    public void controllerTX(){
        userDao.update();
         //手动抛出一个RuntimeException
        System.out.println(2/0);
        jwtUserDao.update();
    }

 <update id="update">
        UPDATE jwt_user SET username ='wangwuupdate' WHERE user_id= 2
    </update>
    
 <update id="update">
        UPDATE user SET username ='zsupdate' WHERE id= 2
    </update>

    @RequestMapping("/a1")
    public void a1(){
        transactionalService.a1();
    }

    
    @RequestMapping("/a2")
    public void a2(){
        transactionalService.a2();
    }
    
    @RequestMapping("/a3")
    public void a3(){
        transactionalService.a3();
    }
    
    @RequestMapping("/a4")
    public void a4(){
        transactionalService.a4();
    }
    
    @RequestMapping("/a5")
    public void a5(){
        transactionalService.a5();
    }
    
    @RequestMapping("/a6")
    public void a6(){
        transactionalService.a6();
    }


    
    @RequestMapping("/b5")
    public  void b5(){
        transactionalService.b5();
    }

    
    @RequestMapping("/b6")
    public  void b6(){
        transactionalService.b6();
    }

    
    @RequestMapping("/b7")
    public  void b7(){
        transactionalService.b7();
    }

    
    @RequestMapping("/b8")
    public  void b8(){
        transactionalService.b8();
    }