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"));
        }
        
        
        

}