一、编写代码

@Repository
public interface UserMapper extends BaseMapper<User> {
}

	@Autowired
    private UserMapper userMapper;
    
    //Mybatisplus实现修改操作
    @Test
    public void updateUser(){
        User user = new User();
        user.setId(2L);
        user.setAge(120);
        int row = userMapper.updateById(user);
        System.out.println("row:"+row);
    }

二、运行结果