标签:多表 nes 连接查询 dao select sla 表单 表连接 one
<mapper namespace="com.abc.dao.INewsLabelDao"> <!-- 多表连接查询 --> <resultMap type="NewsLabel" id="newslabelMap"> <id column="ptid" property="id"/> <result column="ptname" property="name"/> <collection property="children" ofType="NewsLabel"> <id column="cdid" property="id"/> <result column="cdname" property="name"/> </collection> </resultMap> <select id="selectNewsLabelById" resultMap="newslabelMap"> select pt.id ptid,pt.name ptname,cd.id cdid,cd.name cdname from newslabel pt,newslabel cd where pt.id=cd.pid and pt.id=#{xxx} </select> </mapper>
<mapper namespace="com.abc.dao.INewsLabelDao"> <!-- 多表单独查询 --> <select id="selectChildrenByParent" resultMap="newslabelMap"> select id,name from newslabel where pid=#{jjj} </select> <resultMap type="NewsLabel" id="newslabelMap"> <id column="id" property="id"/> <result column="name" property="name"/> <collection property="children" ofType="NewsLabel" select="selectChildrenByParent" column="id"/> </resultMap> <select id="selectNewsLabelById" resultMap="newslabelMap"> select id,name from newslabel where id=#{xxx} </select> </mapper>
<mapper namespace="com.abc.dao.INewsLabelDao"> <!-- 多表单独查询 --> <select id="selectChildrenByParent" resultMap="newslabelMap"> select id,name from newslabel where pid=#{jjj} </select> <resultMap type="NewsLabel" id="newslabelMap"> <id column="id" property="id"/> <result column="name" property="name"/> <collection property="children" ofType="NewsLabel" select="selectChildrenByParent" column="id"/> </resultMap> </mapper>
<mapper namespace="com.abc.dao.INewsLabelDao"> <!-- 多表单独查询 --> <resultMap type="NewsLabel" id="newslabelMap"> <id column="id" property="id"/> <result column="name" property="name"/> <association property="parent" javaType="NewsLabel" select="selectNewsLabelById" column="pid"/> </resultMap> <select id="selectNewsLabelById" resultMap="newslabelMap"> select id,name,pid from newslabel where id=#{jjj} </select> </mapper>
标签:多表 nes 连接查询 dao select sla 表单 表连接 one
原文地址:https://www.cnblogs.com/csslcww/p/9912371.html