事务注解@Transactional

    @Override
    @Transactional(rollbackFor = RuntimeException.class)
    public Role insert(Role role) throws Exception {
        userMapper.deleteById(60);
        if(null!=role){
// 抛出Exception，而rollbackFor = RuntimeException.class，不回滚
             throw new Exception();
        }

}

注意：rollbackFor = RuntimeException.class可以不写，@Transactional注解默认运行是异常，回滚

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Role insert(Role role) throws Exception {
        userMapper.deleteById(60);
        if(null!=role){
// 抛出Exception，而rollbackFor = RuntimeException.class，回滚
             throw new Exception();
        }

}

注意：rollbackFor = Exception.class，回滚的对应的异常就更广泛，这种情况下都，回滚

    @Override
    @Transactional(rollbackFor = RuntimeException.class)
    public Role insert(Role role) throws Exception {
        userMapper.deleteById(60);
        if(null!=role){
// 抛出RuntimeException，上面写的rollbackFor = RuntimeException.class没有关系，不写也不要紧，只要是运行异常，回滚
             throw new  RuntimeException();
        }

}

总结：自定义异常，ThrowableProblem，JUnitException，计算异常，空指针异常，99%的异常都是集成RuntimeException