跳ajax方式进行前后台交互之后台代码要怎么写

 package com.zq.www.mis.action;

 import java.util.List;

 import org.apache.struts2.convention.annotation.Result;
 import org.apache.struts2.convention.annotation.Results;
 import org.springframework.beans.factory.annotation.Autowired;

 import com.zq.www.common.BaseAction;
 import com.zq.www.mis.dao.TorderManagerDAO;
 /**
  *
  * @author zzw 订单审核
  *
  */
 @SuppressWarnings("serial")
 @Results( {
     @Result(name = "show", location = "/BacksAdmin/order_approve/list.jsp"),
     @Result(name = "shenhes", location = "/BacksAdmin/order_approve/list.jsp")

 })
 public class Order1Action extends BaseAction{
     @Autowired
     private TorderManagerDAO dao;
     List<String[]> orderlist;
     private Integer id;
     private String ajaxtext;

     //前台展示全部待审核的信息
     public String show1() throws Exception{
     orderlist=dao.select();
     this.ajaxSendJson(orderlist, true);   //我封装了代码
     return null;
     }
     //这个函数将对应参数的的支付状态修改为"已退款"
     public String shenhe() throws Exception{
     System.out.println("id="+id);
     dao.updateStatus(id);
     this.ajaxSendSuccess();
     return null;
     }
     //批量修改
     public String shenhes() throws Exception
     {
     System.out.println("ajaxtext="+ajaxtext);
     String[] a=ajaxtext.split(",");
     for(int i=1;i<a.length;i++)
     {
         System.out.println("拆开的值是;"+a[i]);
         dao.updateStatus(Integer.parseInt(a[i]));

     }
     return "shenhes";
     }

     public List<String[]> getOrderlist() {
         return orderlist;
     }
     public void setOrderlist(List<String[]> orderlist) {
         this.orderlist = orderlist;
     }
     public Integer getId() {
         return id;
     }
     public void setId(Integer id) {
         this.id = id;
     }
     public String getAjaxtext() {
         return ajaxtext;
     }
     public void setAjaxtext(String ajaxtext) {
         this.ajaxtext = ajaxtext;
     }

   }

我封装的代码如下

 package com.zq.www.common;

 import javax.servlet.ServletContext;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import javax.servlet.http.HttpSession;

 import org.apache.struts2.ServletActionContext;

 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.serializer.SerializerFeature;
 import com.opensymphony.xwork2.ActionSupport;

 //提取的公共Action
 public class BaseAction extends ActionSupport{

     // 取得Request/Response/Session的简化函数 //

         /**
          * 取得HttpRequest的简化方法.
          */
         public static HttpServletRequest getRequest() {
             return ServletActionContext.getRequest();
         }

         /**
          * 取得HttpResponse的简化方法.
          */
         public static HttpServletResponse getResponse() {
             return ServletActionContext.getResponse();
         }

         /**
          * 取得HttpSession的简化方法.
          */
         public static HttpSession getSession() {
             return ServletActionContext.getRequest().getSession();
         }

         /**
          * 取得Application的简化方法.
          */
         public static ServletContext getApplication() {
             return ServletActionContext.getServletContext();
         }

         /**
          * 发送普通的json
          */
         public static void ajaxSendJson(Object obj) throws Exception{
             ajaxSendJson(obj,false);
         }

         /**
          * 发送普通的json，带日期
          */
         public static void ajaxSendJson(Object obj,boolean isDate) throws Exception{
             String result="";
             if(isDate)
                 result=JSON.toJSONString(obj,SerializerFeature.WriteDateUseDateFormat);
             else
                 result=JSON.toJSONString(obj);
             getResponse().getWriter().write(result);
         }

         /*
          *发送success
          *
          */
         public static void ajaxSendSuccess()throws Exception{
             getResponse().getWriter().write(JSON.toJSONString("success"));
         }

 }