mybatis使用foreach踩坑及解決

更新時間：2024年08月20日 09:07:53 作者：大佬喝可樂丶

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mybatis使用foreach踩坑記錄

在使用fireach是最關(guān)鍵的是collection屬性

dao層：

單參數(shù)List和多參數(shù)的list

    /*通過表名（日期）查詢*/
    List<WagesInfoVo> selectWagesBySheet(List<String> sheetNameList);

    /*通過用戶名+表名（日期）查詢*/
    List<WagesInfoVo> selectByPerson(@Param("personNumber") String personNumber,
                                     @Param("sheetNameList") List<String> sheetNameList);

xml文件中foreach屬性的選擇

單參數(shù)的collection=“list”
多參數(shù)的collection=“sheetNameList”,sheetNameList為傳入的參數(shù)

 <select id="selectWagesBySheet" parameterType="java.lang.String"
            resultType="com.zl.wagesmanage.vo.wages.WagesInfoVo">
        select person_number as personNumber,user_name as userName,
        account_number as accountNumber,wage as wage,other_money as otherMoney,reward as reward,
        should as should,old as old,medical as medical,lose_job as loseJob,trade_union as tradeUnion,
        housing_fund as housingFund,take_off as takeOff,total as total,sheet_name as sheetName
        from tt_excel_wages
        where sheet_name in
        <foreach collection="list" index="index" item="sheetNameList"
                 open="(" separator="," close=")">
            #{sheetNameList}
        </foreach>
    </select>

    <select id="selectByPerson" parameterType="java.lang.String"
            resultType="com.zl.wagesmanage.vo.wages.WagesInfoVo">
        select person_number as personNumber,user_name as userName,
        account_number as accountNumber,wage as wage,other_money as otherMoney,reward as reward,
        should as should,old as old,medical as medical,lose_job as loseJob,trade_union as tradeUnion,
        housing_fund as housingFund,take_off as takeOff,total as total,sheet_name as sheetName
        from tt_excel_wages
        where person_number=#{personNumber}
        and sheet_name in
        <foreach collection="sheetNameList" index="index" item="sheetNameList"
                 open="(" separator="," close=")">
            #{sheetNameList}
        </foreach>
    </select>

controller層傳參說明

這里我都是使用@RequestParam進(jìn)行傳參，列舉了get請求和post請求

    /*通過excel的表名進(jìn)行查詢*/
    @GetMapping(value = "getWages")
    @ResponseBody
    public ResponseVO getWages(@RequestParam("sheetNames")List<String> sheetNames){
        try {
            WagesRequestVo wagesRequestVo =new WagesRequestVo();
            //獲取數(shù)據(jù)
            List<WagesInfoVo> wagesInfoVos = wagesServer.getWagesBySheet(sheetNames);

            wagesRequestVo.setWagesInfoVoList(wagesInfoVos);
            if (wagesInfoVos==null){
                return ResponseVO.appFail("查詢失敗");
            }
            return ResponseVO.success(wagesRequestVo);
        }catch (Exception e){
            return ResponseVO.serviceFail(e.getMessage());
        }
    }

    /*通過用戶名和表名進(jìn)行查詢*/
    @PostMapping("getWagesByNumber")
    @ResponseBody
    public  ResponseVO getWagesByNumber(@RequestParam("personNumber")String personNumber,
                                        @RequestParam("sheetName[]")List<String> sheetName){
        try {
            WagesRequestVo wagesRequestVo =new WagesRequestVo();
            //獲取數(shù)據(jù)
            List<WagesInfoVo> wagesInfoVos = wagesServer.getWagesByPerson(personNumber,sheetName);

            wagesRequestVo.setWagesInfoVoList(wagesInfoVos);
            if (wagesInfoVos==null){
                return ResponseVO.appFail("查詢失敗");
            }
            return ResponseVO.success(wagesRequestVo);
        }catch (Exception e){
            return ResponseVO.serviceFail(e.getMessage());
        }
    }