mybatis sql in 语句(转)

mybatis官方文档: http://mybatis.github.io/mybatis-3/zh/index.html

文章出自:

http://fireinjava.iteye.com/blog/1779420

http://www.blogjava.net/xmatthew/archive/2011/08/31/355879.html

1. 当查询的参数只有一个时 
  findByIds(List<Long> ids)
 1.1 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>

 

findByIds(Long[] ids)
 1.2 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>

 

2. 当查询的参数有多个时,例如 findByIds(String name, Long[] ids)
 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
         下面是一个示例
   

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 ID in
 <foreach item="item" index="index" collection="ids" open="(" separator="," close=")">
  #{item}
 </foreach>
</select>

 

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转载自ysj5125094.iteye.com/blog/2182951
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