mybatisPlus-更新和删除数据

 @Test
    public void updateUser(){
        User user = new User();
        user.setId(2L);
        user.setName("jackson");
        int update = userMapper.updateById(user);
        System.out.println(update);

    }

   @Test
    public void updateUser(){
        User user = new User();
        user.setName("jack");
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.like("NAME","ck");//模糊匹配%xx%
        int update = userMapper.update(user,queryWrapper);
        System.out.println(update);

    }