Tbed/src/main/resources/mapper/AlbumMapper.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="cn.hellohao.dao.AlbumMapper">


    <select id="selectAlbum" parameterType="cn.hellohao.pojo.Album" resultType="cn.hellohao.pojo.Album">
        SELECT
        *
        FROM
        `album`
        <where>
            <if test="albumkey != null">
                `albumkey` = #{albumkey}
            </if>
            <if test="userid != null">
                `userid` = #{userid}
            </if>
        </where>
    </select>


    <insert id="addAlbum" parameterType="cn.hellohao.pojo.Album">
        insert into `album` (albumkey,albumtitle,createdate,`password`,userid)
        values (#{albumkey},#{albumtitle},#{createdate},#{password},#{userid})
    </insert>

    <delete id="deleteAlbum" parameterType="string">
        delete from album where albumkey=#{albumkey}
    </delete>

    <select id="selectAlbumURLList" parameterType="cn.hellohao.pojo.Album" resultType="cn.hellohao.pojo.Album">
        SELECT
        a.albumkey,
        a.albumtitle,
        a.createdate,
        a.`password`,
        a.userid,
        u.username
        FROM `album` a LEFT JOIN user u on a.userid = u.id
        <where>
            <if test="albumkey != null">
                `albumkey` like '%${albumkey}%'
            </if>
            <if test="username != null">
                `username` like '%${username}%'
            </if>
            <if test="userid != null">
                a.userid = #{userid}
            </if>
        </where>
        order by a.createdate
    </select>

    <select id="selectAlbumCount" parameterType="integer" resultType="integer">
        SELECT
        count(albumkey)
        FROM
        `album`
        <where>
            <if test="userid != null">
                `userid` = #{userid}
            </if>
        </where>
    </select>

    <update id="updateAlbum" parameterType="cn.hellohao.pojo.Album">
        UPDATE `album`
        <set>
            <if test="albumtitle != null">
                albumtitle = #{albumtitle},
            </if>
            <if test="password != null">
                password = #{password},
            </if>
        </set>
        WHERE
        albumkey = #{albumkey}
    </update>

</mapper>