mybatis：如何在映射器的 bean 中迭代哈希图？

Question

mapper interface:

List<Map<String, String>> selectXXXList(BeanA a);

BeanA:

private Map<String, String> map;

I need iterate this map in xxxMapper.xml. I tried in this way, but it can not work.

<select id = "selectXXXList" resultType="hashMap">
   SELECT * FROM tableA
   WHERE
      1=1 
      <foreach collection="a.map.keys" item="item" index="index" open="" seperator="" close="">
      AND ${item} = #{a.map[${item}]}
      </foreach>
<select>

It is able to iterator the key in this way. But the value of hashMap #{a.map[${item}]} does not work. Any idea? I can not change the interface BTW.

Answer 1

Try this :

<select id="selectXXXList" parameterType="beanA" resultType="hashmap">    
    select * from TABL where 
    <foreach  collection="map"  index="key" item="value"  open=""  separator=" and "  close="">
        ${key}=#{value}
    </foreach>
</select>