【MyBatis】学习笔记10：添加功能获取自增的主键

@Test
    public void testJDBC() throws Exception{
        Class.forName("");
        Connection connection = DriverManager.getConnection("","","");
        PreparedStatement ps = connection.prepareStatement("");
        ps.executeUpdate();
        ResultSet resultSet = ps.getGeneratedKeys();
    }

/**
     * 新增用户
     * @param user 用户对象
     */
    void insertUser(User user);

<!--    useGeneratedKeys：设置当前标签中的SQL使用自增主键-->
<!--    keyProperty：将自增的主键的值传输到映射文件中参数的某个属性-->
<!--    void insertUser(User user);-->
    <insert id="insertUser" useGeneratedKeys="true" keyProperty="userId">
        insert into t_users set
        userName=#{userName},
        userCount=#{userCount},
        userPassword=#{userPassword}
    </insert>

public void testGetUserByLike(String username){
        SqlSession sqlSession = SqlSessionUtils.getSqlSession();
        SQLMapper mapper = sqlSession.getMapper(SQLMapper.class);
        List<User> list = mapper.getUserByLike(username);
        System.out.println(list);
    }
    @Test
    public void testInsertUser(){
        SqlSession sqlSession = SqlSessionUtils.getSqlSession();
        SQLMapper mapper = sqlSession.getMapper(SQLMapper.class);
        User user = new User("照刘狗","zliho","123456");
        mapper.insertUser(user);
        testGetUserByLike("狗");
    }