mec/mec-web/src/main/resources/config/mybatis/SubjectMapper.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">
<!--
这个文件是自动生成的。
不要修改此文件。所有改动将在下次重新自动生成时丢失。
-->
<mapper namespace="com.ym.mec.web.dal.dao.SubjectDao">

    <resultMap type="com.ym.mec.web.dal.entity.Subject" id="Subject">
        <result column="id_" property="id"/>
        <result column="name_" property="name"/>
        <result column="code_" property="code"/>
        <result column="parent_subject_id_" property="parentSubjectId"/>
        <result column="create_time_" property="createTime"/>
        <result column="update_time_" property="updateTime"/>
        <result column="del_flag_" property="delFlag" typeHandler="com.ym.mec.common.dal.CustomEnumTypeHandler"/>
    </resultMap>

    <!-- 根据主键查询一条记录 -->
    <select id="get" resultMap="Subject">
		SELECT * FROM subject WHERE id_ = #{id} 
	</select>

    <!-- 全查询 -->
    <select id="findAll" resultMap="Subject">
		SELECT * FROM subject ORDER BY id_
	</select>

    <!-- 向数据库增加一条记录 -->
    <insert id="insert" parameterType="com.ym.mec.web.dal.entity.Subject" useGeneratedKeys="true" keyColumn="id"
            keyProperty="id">
        <!--
        <selectKey resultClass="int" keyProperty="id" >
        SELECT SEQ_WSDEFINITION_ID.nextval AS ID FROM DUAL
        </selectKey>
        -->
        INSERT INTO subject (id_,name_,code_,parent_subject_id_,create_time_,update_time_,del_flag_)
        VALUES(#{id},#{name},#{code},#{parentSubjectId},#{createTime},#{updateTime},#{delFlag,typeHandler=com.ym.mec.common.dal.CustomEnumTypeHandler})
    </insert>

    <!-- 根据主键查询一条记录 -->
    <update id="update" parameterType="com.ym.mec.web.dal.entity.Subject">
        UPDATE subject
        <set>
            <if test="delFlag != null">
                del_flag_ = #{delFlag,typeHandler=com.ym.mec.common.dal.CustomEnumTypeHandler},
            </if>
            <if test="parentSubjectId != null">
                parent_subject_id_ = #{parentSubjectId},
            </if>
            <if test="code != null">
                code_ = #{code},
            </if>
            <if test="updateTime != null">
                update_time_ = #{updateTime},
            </if>
            <if test="name != null">
                name_ = #{name},
            </if>
        </set>
        WHERE id_ = #{id}
    </update>

    <!-- 根据主键删除一条记录 -->
    <delete id="delete">
		DELETE FROM subject WHERE id_ = #{id} 
	</delete>

    <!-- 分页查询 -->
    <select id="queryPage" resultMap="Subject" parameterType="map">
        SELECT * FROM subject ORDER BY id_
        <include refid="global.limit"/>
    </select>

    <!-- 查询当前表的总记录数 -->
    <select id="queryCount" resultType="int">
		SELECT COUNT(*) FROM subject
	</select>

    <select id="findSubByMusicGroupId" resultMap="Subject">
        SELECT s.* FROM music_group_subject_plan mgsp LEFT JOIN `subject` s ON mgsp.subject_id_ = s.id_ WHERE mgsp.music_group_id_ = #{musicGroupId}
    </select>
</mapper>