mybatis divides the string and loops to realize the operation of multiple parameters of in

mybatis divides strings and loops, realizing multiple parameters of in

mybatis xml code:

  <select id="selectInXh" resultMap="BaseResultMap" parameterType="java.lang.String">
    select *
    from carinfo
    where
    xh in
 <if test="param1 != null and param1 != ''">
  <foreach item="item" index="index" collection="param1.split(',')" open="(" separator="," close=")">
   #{item}
  </foreach>
 </if>
  </select>

mybatis sql Print:

==>  Preparing: select * from carinfo where xh in ( ? , ? ) 
==> Parameters: 1(String), 2(String)

The mybatis multi-parameter use method and some of the parameters are multiple values using the in query

1. When there is only 1 parameter and the parameter type is List

List<AnalysisInfo> listInfo(@Param("orderIds") List<Integer> orderIds);

I rename the parameter here to "orderIds", so collection= "orderIds" in foreach below, and collection= "list" in foreach if not renamed

<select id="listInfo" resultType="com.ieou.retail.module.H5.dto.AnalysisInfo">
       select materials_name as materialsName,sum(num) as totalNum,
       sum(price) as totalSale
       from sales_order_detail
       where shipment_result = 'SUCCESS' and refunds_time is null
       and sales_order_id in
       <foreach collection="orderIds" index="index" item="item" open="(" separator="," close=")">
           #{item}
      </foreach>
      group by materials_id order by totalNum desc limit 5
  </select>

2. When there is only 1 parameter and the parameter type is Array

List<AnalysisInfo> listInfo(Long[] orderIds);

If the parameter type is Array, the collection property is array

<select id="listInfo" resultType="com.ieou.retail.module.H5.dto.AnalysisInfo">
       select materials_name as materialsName,sum(num) as totalNum,
       sum(price) as totalSale
       from sales_order_detail
       where shipment_result = 'SUCCESS' and refunds_time is null
       and sales_order_id in
       <foreach collection="array" index="index" item="item" open="(" separator="," close=")">
           #{item}
      </foreach>
      group by materials_id order by totalNum desc limit 5
  </select>

3. Note that when the query has multiple parameters, such as

List<AnalysisInfo> listInfo(List<Integer> orderIds, Integer num);

In this case, the Map method should be used for passing parameters, so that the name can be specified in the collection attribute

Map<String, Object> params = new HashMap<>();
params.put("orderIds",orderIds);
params.put("num",num);
List<AnalysisInfo> listInfo(params);

XML is as follows:

<select id="listInfo" resultType="com.ieou.retail.module.H5.dto.AnalysisInfo">
    select materials_name as materialsName,sum(num) as totalNum,
    sum(price) as totalSale
    from sales_order_detail
    where shipment_result = 'SUCCESS' and refunds_time is null and num = #{num}
    and sales_order_id in
    <foreach collection="orderIds" index="index" item="item" open="(" separator="," close=")">
        #{item}
    </foreach>
    group by materials_id order by totalNum desc limit 5
</select>