build/classes/dao/ApplyMapper.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="dao.ApplyMapper" >
  <resultMap id="ApplyUserlistResultMap" type="Pojo.Apply" >
    <id column="apply_id" property="id" jdbcType="INTEGER" />
    <result column="house_id" property="house_id" jdbcType="VARCHAR" />
    <result column="address" property="address" jdbcType="VARCHAR" />
     <result column="area" property="area" jdbcType="DOUBLE" />
     <result column="price" property="price" jdbcType="DOUBLE" />
     <result column="status" property="status" jdbcType="VARCHAR" />
      <result column="userlist_id" property="userlist_id" jdbcType="INTEGER" />
      <association property="userlist" javaType="Pojo.Userlist">
			<!-- column:userlist表的主键对应的列  property：userlist对象中id属性-->
	<id column="id" property="id"/>		
	<result column="name" property="name" jdbcType="VARCHAR" />
    <result column="idcard" property="idcard" jdbcType="VARCHAR" />
    <result column="phone" property="phone" jdbcType="VARCHAR" />
     <result column="user_id" property="user_id" jdbcType="INTEGER" />
		</association>
      
  </resultMap>
  <insert id="insertapply" parameterType="Pojo.Apply">
	  insert into apply(house_id,address,price,area,status,userlist_id) 
	  values(#{house_id},#{address},#{price},#{area},#{status},#{userlist_id})
	</insert>
	
<update id="updateapplystatus" parameterType="Pojo.Apply">
		update apply set status=#{status} where house_id=#{house_id}
</update>
	
	<select id="findapplylist" resultMap="ApplyUserlistResultMap">
		SELECT
			a.*,
			u.*
		FROM
			apply a
		JOIN `userlist` u ON u.id = a.userlist_id and status='申请中'
	</select>
	
	 <select id="findallapplyout" resultMap="ApplyUserlistResultMap">
			SELECT
	u.*, a.*
FROM
	`userlist` u
, apply a WHERE u.id = a.userlist_id AND STATUS='已拒绝'

	</select>
	
	<select id="findbyhouse_id" parameterType="string" resultType="Pojo.Apply">
		select * from apply where house_id=#{house_id}
	</select>
	<delete id="deletebyhouse_id" parameterType="String" >
		delete from apply where house_id=#{house_id}
	</delete>
</mapper>