User.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.springboot.mapper.UserMapper">

    <insert id="save">
        insert into user(name, username, age, sex, phone, address, account)
        values(#{name}, #{username}, #{age}, #{sex}, #{phone}, #{address}, #{account})
    </insert>

    <update id="updateById">
        update user set name = #{name}, age = #{age}, sex = #{sex}, phone = #{phone}, address = #{address},
                        updatetime = #{updatetime}, account = #{account}, status = #{status} where id = #{id}
    </update>

    <update id="updateByUserNo">
        update user set account = account + #{score}, where username = #{userNo}
        <set>
            <if test="status != null">
                status = #{status}
            </if>
        </set>
    </update>

    <delete id="deleteById">
        delete from user where id = #{id}
    </delete>

    <select id="list" resultType="com.example.springboot.entity.User">
        select * from user
    </select>

    <select id="listByCondition" resultType="com.example.springboot.entity.User">
        select * from user
            <where>
                <if test="name != null and name != ''">
                    name like concat('%', #{ name }, '%')
                </if>
                <if test="phone != null and phone != ''">
                    and phone like concat('%', #{ phone }, '%')
                </if>
            </where>
        order by id desc
    </select>

    <select id="getById" resultType="com.example.springboot.entity.User">
        select * from user where id = #{id}
    </select>
    <select id="getByUsername" resultType="com.example.springboot.entity.User">
        select * from user where username = #{username}
    </select>

</mapper>