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  • mybatis遍历array数组与集合、json

    遍历数组

    int saveOptions(@Param("items")String[] items, @Param("questionId")int questionId) throws Exception;

    <insert id="saveOptions">
    <foreach item="item" index="index" collection="items" separator=";">
    insert into options values(#{item},#{questionId},1)
    </foreach>
    </insert>

    遍历集合:参考之前文章

    20180626:嵌套list遍历

    
    

    int saveOptions(@Param("list")List<List<String>> list) throws Exception;


    <
    insert id="saveOptions"> insert into options(optionsName,remark,selectOptions) values <foreach item="items" collection="list" separator=","> ( <foreach item="item" collection="items" separator=","> #{item} </foreach> ) </foreach> </insert>

    其中collection="list"是指遍历的集合名称是list

    item="items"是指遍历的每一项别名叫items


    20190319传入json:
    //传参:
    JSONObject jsonParam= new JSONObject();
    jsonParam.put("yananId=", 1);
    jsonParam.put("yananName=","张三");
    //接口
    List<Map<String, Object>> getListByWhere(@Param("jsonParam")JSONObject jsonParam);
    
    //mybatis
        <select id="getListByWhere" parameterType="net.sf.json.JSONObject" resultType="java.util.Map">
            select yananId,yananName
            from yanan 
            <foreach collection="jsonParam" open="where" separator="and" item="jsonValue" index="jsonKey">
                ${jsonKey} #{jsonValue}
            </foreach>
        </select>

    打印sql:

    select yananId,yananName from yanan where yananId=? and yananName =?
    
    
    ==> Parameters: 68(Integer), 张三(String)
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  • 原文地址:https://www.cnblogs.com/yanan7890/p/8926977.html
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