src/main/resources/mapper/DeptMapper.xml

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<?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.yj.oa.project.mapper.DeptMapper">
    <resultMap id="BaseResultMap" type="Dept">
        <!--
          WARNING - @mbggenerated
          This element is automatically generated by MyBatis Generator, do not modify.
        -->
        <id column="depId" jdbcType="VARCHAR" property="depId"/>
        <result column="deptName" jdbcType="VARCHAR" property="deptName"/>
        <result column="leader" jdbcType="VARCHAR" property="leader"/>
        <result column="introduce" jdbcType="VARCHAR" property="introduce"/>
        <result column="status" jdbcType="INTEGER" property="status"/>
        <result column="createTime" jdbcType="TIMESTAMP" property="createTime"/>

        <collection property="users" ofType="User">
            <id column="uid" property="uid" jdbcType="VARCHAR"/>
            <result column="name" property="name" jdbcType="VARCHAR"/>
            <result column="dept" property="dept" jdbcType="VARCHAR"/>
        </collection>

    </resultMap>

    <sql id="Base_Column_List">
        depId, leader,deptName, introduce, d.createTime,d.status
    </sql>

    <!--
       根据主键查询
    -->
    <select id="selectByPrimaryKey" parameterType="java.lang.String" resultMap="BaseResultMap">
        select u.uid,u.name,
        <include refid="Base_Column_List"/>
        from t_dept d
        LEFT JOIN t_user u on d.depId=u.dept
        where depId = #{depId,jdbcType=VARCHAR}
    </select>

    <!--
       检验部门唯一性
    -->
    <select id="checkDeptNameUnique" parameterType="String" resultMap="BaseResultMap">
    select * from t_dept d
    where deptName=#{deptName}
  </select>


    <!--
       查询出所有部门下的所有用户
    -->
    <select id="selectDeptAndUser" resultMap="BaseResultMap">
        select u.uid,u.name,
        <include refid="Base_Column_List"/>
        from t_dept d
        LEFT JOIN t_user u on d.depId=u.dept

    </select>


    <!--