MyBatis如何進行雙重foreach循環(huán)
更新時間:2022年02月08日 11:14:29 作者:harden_no1
這篇文章主要介紹了MyBatis如何進行雙重foreach循環(huán),具有很好的參考價值,希望對大家有所幫助。如有錯誤或未考慮完全的地方,望不吝賜教
進行雙重foreach循環(huán)
mapname是一個Map<String,Map<String,Object>> 對象
<foreach collection="mapname" index="key1" item="value1" separator=","> ?? ?<foreach collection="value1" index="key2" item="value2" separator=","> ?? ??? ?#{key1}, ?? ??? ?#{key2}, ?? ??? ?#{value2} ?? ?</foreach> </foreach>
使用場景
比如說一個付款人下面對應的運單的金額,那么key1就是付款人編號,key2是運單編號,value2是分攤的金額
mybatis foreach循環(huán),傳入多個參數(shù)
上代碼
controller:
@RequestMapping(value = "/findPage", method = RequestMethod.POST) @ResponseBody public Object findPage(@RequestParam(required=false) String jobCategory,@RequestParam(required=false) String ids,@RequestParam(required=false) String cities) { try { List<Integer> listJob = new ArrayList<Integer>(); List<Integer> listIds = new ArrayList<Integer>(); List<String> listCities = new ArrayList<String>(); //按照城市名稱和工種查詢 if(StringUtils.isNotBlank(jobCategory) && StringUtils.isNotBlank(cities)){ String[] temp = jobCategory.split(","); String[] cityTemp = cities.split(","); for(int i=0;i<temp.length;i++){ listJob.add(Integer.valueOf(temp[i])); } for(int i=0;i<cityTemp.length;i++){ listCities.add(cityTemp[i]); } List<WebsitesJob> list = jobService.findPage(listJob, listIds, listCities); return new ExtGridReturn(list.size(), list); } //按照工種查詢 if(StringUtils.isNotBlank(jobCategory)){ String[] temp = jobCategory.split(","); for(int i=0;i<temp.length;i++){ listJob.add(Integer.valueOf(temp[i])); } } //按照職位名稱查詢 if(StringUtils.isNotBlank(ids)){ String[] temp = ids.split(","); for(int i=0;i<temp.length;i++){ listIds.add(Integer.valueOf(temp[i])); } } //按照城市查詢 if(StringUtils.isNotBlank(cities)){ String[] temp = cities.split(","); for(int i=0;i<temp.length;i++){ listCities.add(temp[i]); } } List<WebsitesJob> list = jobService.findPage(listJob, listIds, listCities); return new ExtGridReturn(list.size(), list); } catch (Exception e) { LOGGER.error("分頁獲取信息出錯", e); return new ExceptionReturn(e); } }
mapper
/** ? ? ?* 描述:根據(jù)工種查詢列表 ? ? ?* @param jobCategorys ? ? ?* @return ? ? ?*/ ? ? List<WebsitesJob> findPage(@Param("jobCategorys") List<Integer> jobCategorys,@Param("ids") List<Integer> ids,@Param("workPlace") List<String> workPlace);
xml
<!-- 前臺查詢列表 --> <select id="findPage" resultType="cn.edu.hbcf.plugin.websites.pojo.WebsitesJob"> select n.ID id, n.NAME name, n.WORKPLACE workPlace, n.JOBCATEGORY jobCategory, n.SALARY salary, n.RESPONSIBILITIES responsibilities, n.REQUIREMENTS requirements, n.ISHOT isHot, n.UPDATEDATE updateDate, n.UPDATEUSER updateUser, u.real_name updateName from websites_job n left join base_users u on n.updateUser = u.account <where> <if test="jobCategorys.size()!=0"> or n.jobCategory in <foreach collection="jobCategorys" index="index" item="item" open="(" separator="," close=")"> #{item} </foreach> </if> <if test="ids.size()!=0"> or n.id in <foreach collection="ids" item="item" index="index" open="(" separator="," close=")"> #{item} </foreach> </if> <if test="workPlace.size()!=0"> or n.WORKPLACE in <foreach collection="workPlace" item="item" index="index" open="(" separator="," close=")"> #{item} </foreach> </if> </where> order by n.ISHOT,n.ID desc </select>
以上為個人經(jīng)驗,希望能給大家一個參考,也希望大家多多支持腳本之家。
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