mybatis使用foreach踩坑及解决
作者：大佬喝可乐丶
这篇文章主要介绍了mybatis使用foreach踩坑及解决,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教
mybatis使用foreach踩坑记录
在使用fireach是最关键的是collection属性
dao层：
单参数List和多参数的list
/*通过表名（日期）查询*/
List<WagesInfoVo> selectWagesBySheet(List<String> sheetNameList);
/*通过用户名+表名（日期）查询*/
List<WagesInfoVo> selectByPerson(@Param("personNumber") String personNumber,
@Param("sheetNameList") List<String> sheetNameList);xml文件中foreach属性的选择
- 单参数的collection=“list”
- 多参数的collection=“sheetNameList”,sheetNameList为传入的参数
<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层传参说明
这里我都是使用@RequestParam进行传参，列举了get请求和post请求
/*通过excel的表名进行查询*/
@GetMapping(value = "getWages")
@ResponseBody
public ResponseVO getWages(@RequestParam("sheetNames")List<String> sheetNames){
try {
WagesRequestVo wagesRequestVo =new WagesRequestVo();
//获取数据
List<WagesInfoVo> wagesInfoVos = wagesServer.getWagesBySheet(sheetNames);
wagesRequestVo.setWagesInfoVoList(wagesInfoVos);
if (wagesInfoVos==null){
return ResponseVO.appFail("查询失败");
}
return ResponseVO.success(wagesRequestVo);
}catch (Exception e){
return ResponseVO.serviceFail(e.getMessage());
}
}
/*通过用户名和表名进行查询*/
@PostMapping("getWagesByNumber")
@ResponseBody
public ResponseVO getWagesByNumber(@RequestParam("personNumber")String personNumber,
@RequestParam("sheetName[]")List<String> sheetName){
try {
WagesRequestVo wagesRequestVo =new WagesRequestVo();
//获取数据
List<WagesInfoVo> wagesInfoVos = wagesServer.getWagesByPerson(personNumber,sheetName);
wagesRequestVo.setWagesInfoVoList(wagesInfoVos);
if (wagesInfoVos==null){
return ResponseVO.appFail("查询失败");
}
return ResponseVO.success(wagesRequestVo);
}catch (Exception e){
return ResponseVO.serviceFail(e.getMessage());
}
}postman截图
- get请求传参方式：
- post传参方式：
总结
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脚本之家。