mybatis 传入集合参数遍历 查询总结

出自：http://blog.csdn.net/u013628152/article/details/51184641

1. findByIds(List ids)

如果参数的类型是List, 则在使用时，collection属性要必须指定为 list

<select id="findByIdsMap" resultMap="BaseResultMap">
 Select
 <include refid="Base_Column_List" />
 from jria where ID in
 <foreach item="item" index="index" collection="list" open="(" separator="," close=")">
  #{item}
 </foreach>
</select>

2：findByIds(Long[] ids)

如果参数的类型是Array,则在使用时，collection属性要必须指定为 array

<select id="findByIdsMap" resultMap="BaseResultMap">
    select
    <include refid="Base_Column_List" />
    from tabs where ID in
    <foreach item="item" index="index" collection="array" open="(" separator="," close=")">
     #{item}
    </foreach>
</select>

3. findByIds(String name, Long[] ids)

当查询的参数有多个时: 
这种情况需要特别注意，在传参数时，一定要改用Map方式, 这样在collection属性可以指定名称

 Map<String, Object> params = new HashMap<String, Object>(2);
 params.put("name", name);
 params.put("ids", ids);
 mapper.findByIdsMap(params);

<select id="findByIdsMap" resultMap="BaseResultMap">
     select
     <include refid="Base_Column_List" />
     from tabs where
     name = #{name}
     and ID in
     <foreach item="item" index="index" collection="ids" open="(" separator="," close=")">
      #{item}
     </foreach>
</select>