对象的字符串字段classification="SHA1289712,SHA1289713" ,需要把classification分割出来,并进行遍历;
如果是传单个值,就可以直接分割
或者1、封装成array数组类型 collection="array";
2、封装成List类型 collection="list";
3、封装成Map类型 collection="是传入的参数Map的key";
<if test="classification != null and classification != ''"> and classification in <foreach item="item" index="index" collection="classification.split(',')" open="(" separator="," close=")"> #{item} </foreach> </if>