@Transactional失效和生效部分常见场景

1.不生效

1.1 没有带事务注解的方法调带事务注解的方法

public void initUser1(User user) {save(user);initPoint1(user.getId());
}@Transactional
public void initPoint1(Integer userId) {UserPoint userPoint = new UserPoint();userPoint.setUserId(userId);userPoint.setPoint(0);userPointService.save(userPoint);int i = 5 / 0;
}

@Test
void test1() {User user = new User();user.setId(1);user.setName("1");userService.initUser1(user);
}

1.2 捕获异常，不抛出

@Transactional
public void initUser3(User user) {save(user);initPoint3(user.getId());
}public void initPoint3(Integer userId) {UserPoint userPoint = new UserPoint();userPoint.setUserId(userId);userPoint.setPoint(0);userPointService.save(userPoint);try {int i = 5 / 0;} catch (Exception e) {System.out.println("不抛出异常，事务不生效");}
}

@Test
void test3() {User user = new User();user.setId(3);user.setName("3");userService.initUser3(user);
}

1.3 不带事务方法调带事务方法

public void initUser4(User user) {save(user);initUser4_1(user);
}@Transactional
public void initUser4_1(User user) {user.setId(user.getId()+1);save(user);int i = 5 / 0;
}

@Test
void test4() {User user = new User();user.setId(4);user.setName("4");userService.initUser4(user);
}

2.生效

2.1 带事务注解的方法调无事务注解的私有(公有)方法

@Transactional
public void initUser2(User user) {save(user);initPoint2(user.getId());
}private void initPoint2(Integer userId) {UserPoint userPoint = new UserPoint();userPoint.setUserId(userId);userPoint.setPoint(0);userPointService.save(userPoint);int i = 5 / 0;
}

@Test
void test2() {User user = new User();user.setId(2);user.setName("2");userService.initUser2(user);
}

2.2 @Transactional写在类上，公有调用私有

@Service
@Transactional
public class UserService2 extends ServiceImpl<UserMapper, User> {@Autowiredprivate UserPointService userPointService;public void initUser6(User user) {save(user);initPoint6(user.getId());}private void initPoint6(Integer userId) {UserPoint userPoint = new UserPoint();userPoint.setUserId(userId);userPoint.setPoint(0);userPointService.save(userPoint);int i = 6 / 0;}}

@Test
void test6() {User user = new User();user.setId(6);user.setName("6");userService2.initUser6(user);
}