Mybatis之collection嵌套查询mapper文件写法

 

mapper.xml写法举例

 1 xml version="1.0" encoding="UTF-8" ?>
 2 DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
 3 <mapper namespace="maserati.dao.meta.list.ListSchemaMapper">
 4     <resultMap id="BaseResultMap" type="maserati.dao.meta.list.entity.ListSchemaEntity">
 5         <id column="id" property="id" jdbcType="INTEGER"/>
 6         <result column="mod_name" property="modName" jdbcType="VARCHAR"/>
 7         <result column="prop_name" property="propName" jdbcType="VARCHAR"/>
 8         <result column="prop_desc" property="propDesc" jdbcType="VARCHAR"/>
 9         <result column="del_flag" property="delFlag" jdbcType="BIT"/>
10         <result column="create_time" property="createTime" jdbcType="TIMESTAMP"/>
11         <result column="update_time" property="updateTime" jdbcType="TIMESTAMP"/>
12     resultMap>
13 
14 
15     <resultMap id="ListMeta" type="maserati.dao.meta.list.entity.ListMeta">
16         <result column="mod_name" property="modName" jdbcType="VARCHAR"/>
17         <result column="mod_desc" property="modTitle" jdbcType="VARCHAR"/>
18         <collection property="tHeads" ofType="maserati.dao.meta.list.entity.PropMeta"
19                     select="selectTableHeads" column="mod_name" javaType="ArrayList"/>
20     resultMap>
21     <resultMap id="TableHead" type="maserati.dao.meta.list.entity.PropMeta">
22         <result property="propName" column="prop_name" jdbcType="VARCHAR"/>
23         <result property="propDesc" column="prop_desc" jdbcType="VARCHAR"/>
24         <result property="propType" column="prop_type" jdbcType="VARCHAR"/>
25     resultMap>
26 
27 
28     <sql id="Base_Column_List">
29     id, mod_name, prop_name, prop_desc, del_flag, create_time, update_time
30   sql>
31     <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer">
32         select
33         <include refid="Base_Column_List"/>
34         from t_list_schema
35         where id = #{id,jdbcType=INTEGER}
36     select>
37 
38     <select id="selectAllProdListMeta" resultMap="ListMeta">
39     select
40       distinct mod_name,mod_desc
41     from t_list_schema where mod_name in ('loan','credit_card','other_prod') and del_flag = 0
42   select>
43 
44     <select id="selectTableHeads" resultMap="TableHead" parameterType="java.lang.String">
45     select prop_name,prop_desc,prop_type
46     from t_list_schema where mod_name='${value}' and del_flag = 0 order by sort_index
47   select>
48 
49     <select id="selectPropNameByModName" resultType="java.lang.String" parameterType="java.lang.String">
50         select prop_name from t_list_schema where mod_name=#{value} and del_flag=0
51         order by sort_index
52     select>
53 
54     <select id="selectTableHeadsByModName" resultMap="TableHead" >
55         select prop_name,prop_desc,prop_type from t_list_schema where mod_name=#{value} and del_flag=0
56         order by sort_index
57     select>
58 mapper>