这篇文章主要介绍MyBatis怎么进行双重foreach循环，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
进行双重foreach循环
mapname是一个Map<String,Map<String,Object>> 对象
<foreach collection="mapname" index="key1" item="value1" separator=","> <foreach collection="value1" index="key2" item="value2" separator=","> #{key1}, #{key2}, #{value2} </foreach></foreach>使用场景
比如说一个付款人下面对应的运单的金额，那么key1就是付款人编号，key2是运单编号，value2是分摊的金额
mybatis foreach循环,传入多个参数
上代码
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>(); //按照城市名称和工种查询 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); } //按照工种查询 if(StringUtils.isNotBlank(jobCategory)){ String[] temp = jobCategory.split(","); for(int i=0;i<temp.length;i++){ listJob.add(Integer.valueOf(temp[i])); } } //按照职位名称查询 if(StringUtils.isNotBlank(ids)){ String[] temp = ids.split(","); for(int i=0;i<temp.length;i++){ listIds.add(Integer.valueOf(temp[i])); } } //按照城市查询 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("分页获取信息出错", e); return new ExceptionReturn(e); } }mapper
List<WebsitesJob> findPage(@Param("jobCategorys") List<Integer> jobCategorys,@Param("ids") List<Integer> ids,@Param("workPlace") List<String> workPlace);xml
<!-- 前台查询列表 --> <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>以上是“MyBatis怎么进行双重foreach循环”这篇文章的所有内容，感谢各位的阅读！希望分享的内容对大家有帮助，更多相关知识，欢迎关注编程网行业资讯频道！
