利用ajax同步获取服务器的数据，当页面加载完成的时候
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path; %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1" /> <title>中介门店注册</title> <link rel="stylesheet" type="text/css" href="static/css/messageProtect.css" /> <link rel="stylesheet" type="text/css" href="static/css/reset.css" /> <link rel="stylesheet" type="text/css" href="static/lib/laydate/need/laydate.css" /> <script type="text/javascript" src="static/js/jquery-3.1.1.min.js"></script> <script type="text/javascript" src="static/lib/laydate/laydate.js"></script> <script src="static/js/city2.js"></script> <script type="text/javascript" src="static/js/citySelect2.js"></script> <script type="text/javascript" src="static/js/messageProtect.js"></script> <script type="text/javascript" src="static/js/plugIn.js"></script> <script type="text/javascript"> /*当页面加载完成时调用*/ $(document).ready(function(){ getAllSystemData(); }); /*ajax同步发请求（当页面加载的时候）*/ function getAllSystemData(){ $.ajax({ type:"post", /*为post方式*/ async:false, /*开启同步请求，true为异步请求*/ url:"all_system_count", /*url为发请求的url，利用Controller@RequestMapping进行拦截*/ success:function(data){ /*当请求成功之后回调*/ data = eval("("+data+")"); fillSystemInfo(data.root); /*获取json串,并传给这个方法*/ } }); } function fillSystemInfo(data){ var s = "<tr><td>项目总数</td><td>置业顾问总数</td><td>房源总数</td><td>门店总数</td><td>经纪人总数</td><td>合伙人总数</td></tr>"; $.each(data,function(v,o){ /*o为json的数据（后台传过来的）*/ s+='<tr><td>'+o.projectCount+'</td>'; s+='<td>'+o.adviserCount+'</td>'; s+='<td>'+o.houseCount+'</td>'; s+='<td>'+o.shopCount+'</td>'; s+='<td>'+o.agentCount+'</td>'; s+='<td>'+o.partnerCount+'</td></tr>'; }); if(data.length>0){ $("#systemCountInfo").html(s); /*当服务器有数据传送过来,将所有的元素都添加到id为systemCountInfo中*/ }else{ $("#systemCountInfo").html("<br/><span style='width:10%;height:30px;display:block;margin:0 auto;'>暂无数据</span>"); } } </script> </head> <body> <div class="main-content"> <div class="house-list"> <table id="systemCountInfo" style="table-layout:fixed;"> </table> </div> </div> </body> </html>后台代码：
/** * 平台管理控制器 * @author cdh * */ @Controller("systemController") public class SystemController extends BaseController{ @Resource(name="systemService") private SystemService systemService; /** * 获取平台管理中项目总数，职业顾问总数... */ @RequestMapping("all_system") public String toSystemPage(){ return "/all_system_count"; } /*拦截的请求并进行处理*/ @RequestMapping("all_system_count") public void allSystemCount(){ List<Map<String,String>> list = systemService.getSystemCount(); if(list != null){ this.outListString(list); /*this是继承的BaseController中的将List转换成json串的方法*/ } } }Service层：
@Service("systemService") public class SystemServiceImpl implements SystemService{ @Resource(name="baseDao") private BaseDao baseDao; @Override public List<Map<String,String>> getSystemCount() { List<Map<String,String>> countList = new ArrayList<>(); Map<String,String> countMap = new HashMap<>(); /*获取项目总数*/ List<Project> projectList = baseDao.findByHql("from Project"); Integer projectCount = projectList.size(); System.out.println(projectCount); /*获取置业顾问总数 role_id=3代表职业顾问*/ List<Role> roleList = baseDao.findByHql("from Role where id = 3"); Role role = roleList.get(0); Set<User> users = role.getUser(); System.out.println(users.size()); // List<User> adviser = baseDao.findByHql("from User where roleId = "+uSet); Integer adviserCount = users.size(); // System.out.println(adviserCount); /*获取房源总数*/ List<House> houseList = baseDao.findByHql("from House"); Integer houseCount = houseList.size(); System.out.println(houseCount); /*门店总数*/ List<Shops> shopList = baseDao.findByHql("from Shops where shopStatus = 1"); Integer shopCount = shopList.size(); System.out.println(shopCount); /*经纪人总数 roleId=1为中介经纪人*/ List<Role> agentRole = baseDao.findByHql("from Role where id= 1"); Role r = agentRole.get(0); Set<User> agents = r.getUser(); Integer agentCount = agents.size(); System.out.println(agentCount); /*合伙人总数 6为合伙人*/ List<Role> partnerRole = baseDao.findByHql("from Role where id = 6"); Role p = partnerRole.get(0); Set<User> partners = p.getUser(); Integer partnerCount = partners.size(); /*将所有的元素放入Map*/ countMap.put("projectCount", projectCount.toString()); countMap.put("adviserCount", adviserCount.toString()); countMap.put("houseCount", houseCount.toString()); countMap.put("shopCount", shopCount.toString()); countMap.put("agentCount", agentCount.toString()); countMap.put("partnerCount", partnerCount.toString()); /*将Map放入LIst*/ countList.add(countMap); return countList; } }List转json方法：
public void outListString(List list) { String jsonString = null; try { JSONArray jsonArray = new JSONArray(); if (list.size() > 0) { jsonArray = JSONArray.fromObject(list); } jsonString = "{total:" + list.size() + ",root:" + jsonArray.toString() + "}"; } catch (Exception e) { e.printStackTrace(); } System.out.println("=============================="+jsonString); outString(jsonString); }学习中。。。。。。
