ajax异步刷新

前台js

 <script type="text/javascript">

   function getLands() {

       $.ajax({
         url:"httpserver.do?doPost&userQygs="+$("#userQygs").val(),
         type:"POST",
         dataType:"text",

         success:function(data){

          if(data==null||data==""){

             alert("目前没有地块可供选择，请先绘制地块！");
             location.href ="gpadd.do?toArcgis&state=1";
          }else{

             var lands=data.split(",");

            //获得前台的div
            var insertDiv = document.getElementById("land");
            //定义向前台插入的内容为空
            insertDiv.innerHTML = "";
            var chkinfo;
            var chkDIV;
            //var txtinfo;
            //解析从服务器获得的数据,循环添加复选框
            for (var i = 0; i < lands.length-1; i++) {
                //为每一个复选框创建一个DIV
                chkDIV = document.createElement("div");
                //每一个复选框用input创建，类型为checkBox
                chkinfo = document.createElement("input");
                chkinfo.name = "landDkbh";
                chkinfo.id = "landDkbh";
                chkinfo.type = "checkbox";
               // chkinfo.onclick = test;
                //将每一个chinesename为复选框赋值
                chkinfo.value = lands[i];
               //将复选框添加到Div中
                chkDIV.appendChild(chkinfo);
                //为Div设置样式
                chkDIV.style.height = "50px";
                chkDIV.style.width = "150px";
                chkDIV.style.float = "left";
                chkDIV.align = "left";
                chkDIV.appendChild(document.createTextNode(lands[i]));
                //将创建的div添加到前台预留的DIV下
                insertDiv.appendChild(chkDIV);
            }
            }
         }
     });

  }

后台

 package org.lq.ssm.gp.controller;

 import java.io.IOException;
 import java.io.PrintWriter;

 import javax.annotation.Resource;
 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import org.lq.ssm.gp.service.LandUserBiz;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 @SuppressWarnings("serial")
 @Controller
 @RequestMapping("httpserver.do")
 public class httpserverController extends HttpServlet{

     @Resource(name="landUserAction")
     private LandUserBiz landUserBiz;

     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         response.setContentType("text/html;charset=gbk");
         response.setHeader("Cache-Control", "no-cache");
         response.setCharacterEncoding("gbk");
         PrintWriter out=response.getWriter();
         request.setCharacterEncoding("gbk");
         //获取搜索框输入的内容

         String userqygs=request.getParameter("userQygs");
         userqygs=new String(userqygs.getBytes("iso-8859-1"), "gbk");
         System.out.println("区域："+userqygs);

         String res=landUserBiz.getLands(userqygs);
         System.out.println("字符串："+res);
         //response.getWriter().write(res);
         out.write(res);

     }

     @RequestMapping(params="doPost")
     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         doGet(request, response);

     }

     public LandUserBiz getLandUserBiz() {
         return landUserBiz;
     }

     public void setLandUserBiz(LandUserBiz landUserBiz) {
         this.landUserBiz = landUserBiz;
     }

 }