mybatis分割字符串并循环,实现in多个参数的操作

2024-04-02 19:04:59 936人浏览薄情痞子

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摘要

mybatis分割字符串并循环,实现in多个参数 mybatis xml代码： <select id="selectInXh" resultMap="Base

mybatis分割字符串并循环,实现in多个参数

mybatis xml代码：


  <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打印：


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

mybatis多参数使用方法且其中有的参数是多个值使用in查询

1.当只有一个参数时且参数类型是List


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

我这里对参数重命名为"orderIds",所以下面foreach中collection="orderIds"，如果未重命名则foreach中collection="list"


<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. 当只有一个参数时且参数类型是Array


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

如果参数类型是Array则collection属性为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.注意当查询的参数有多个时，例如


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

这种情况下传参要使用Map方式，这样在collection属性可以指定名称


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

XML如下：


<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>

以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。

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