使用mybatis插入自增主键ID的数据后返回自增的ID

1 <insert id="insert" keyProperty="id" useGeneratedKeys="true"? parameterType="com.demo.domain.User">?
2 insert into User_t(name,age,addr) values(#{name},#{age},#{addr})
3 </insert>

　　@Override
    public int insert(User user) {
        int insertNum = Integer.parseInt(userMapper.insert(user) + "");
        Long id = user.getId();//该对象的自增ID
        return insertNum;
    }