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;
    }
    
   
}