js程式碼：

function getExcel(){
  var table=document.getElementById('mytable');
  var rows=table.rows;
  var rowsdata=new Array();
  for(i=0;i<rows.length;i++){
  var row=rows[i];
  var cells=row.cells;
  var celldata=new Array();
  for(j=0;j<6;j++){
  celldata.push(cells[j].innerHTML);
  }
  rowsdata.push(celldata);
  }
  dealXML(rowsdata);
  }
  var XMLHttpReq=false;
  function dealXML(data){
  XMLHttpReq=false;
  createXMLHttpRequest();
  var jsonstr='[';
  for(i=0;i<data.length;i++){
  jsonstr+='{"序號":"'+data[i][0]+'","使用者聯絡手機":"'+data[i][1]+'","使用者稱呼":"'+data[i][2]+'","反饋內容":"'+data[i][3]+'","反饋時間":"'+data[i][4]+'","反饋版本":"'+data[i][5]+'"},';
  }
  jsonstr=jsonstr.substring(0,jsonstr.length-1);
  jsonstr+=']';
  XMLHttpReq.open("GET","./saveExcel?data="+jsonstr, true);
  XMLHttpReq.onreadystatechange = handleResponse_CancelState;
<span style="white-space:pre">	</span>XMLHttpReq.send(null);
  }
  function createXMLHttpRequest(){
<span style="white-space:pre">	</span>if(window.XMLHttpRequest)
<span style="white-space:pre">	</span>{
<span style="white-space:pre">		</span>XMLHttpReq = new XMLHttpRequest();
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span>else
<span style="white-space:pre">	</span>{
<span style="white-space:pre">		</span>XMLHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
<span style="white-space:pre">	</span>}
  }


  function handleResponse_CancelState(){
  if(XMLHttpReq.readyState == 4){<span style="white-space:pre">	</span>
  if(XMLHttpReq.status == 200)
<span style="white-space:pre">		</span>{<span style="white-space:pre">	</span>
<span style="white-space:pre">		</span>alert('匯出成功');
<span style="white-space:pre">			</span>window.location.reload();
<span style="white-space:pre">		</span>}
<span style="white-space:pre">		</span>else{
<span style="white-space:pre">	</span>alert('匯出失敗');
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span>}
<span style="white-space:pre">	</span>}
 

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;


import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.setContentType("text/html;charset=utf-8");
		request.setCharacterEncoding("utf-8");
		String jsonString= new String (request.getParameter("data").getBytes("ISO-8859-1"),"utf-8");
	
		System.out.println(jsonString);
		 List<String> aList = new ArrayList<String>();
	        List<String> bList = new ArrayList<String>();
	        List<String> cList = new ArrayList<String>();
	        JSONArray jsa = JSONArray.fromObject(jsonString);
	        for(Object obj : jsa){
	            JSONObject jso = JSONObject.fromObject(obj);
	            aList.add( jso.get("序號").toString() );
	            bList.add( jso.get("使用者聯絡手機").toString() );
	            cList.add( jso.get("使用者稱呼").toString() );
	        }      
	        for(int i=0;i<aList.size();i++){
	            if(i==0)  
	                System.out.print("a:");
	            System.out.print(aList.get(i)+" ");
	        }      
	        for(int i=0;i<bList.size();i++){
	            if(i==0)  
	                System.out.print("b:");
	            System.out.print(bList.get(i)+" ");
	        }      
	        for(int i=0;i<cList.size();i++){
	            if(i==0) 
	                System.out.print("c:");
	            System.out.print(cList.get(i)+" ");
	        } 
	     
	     
		
			
	}
 

[{"序號":"序號","使用者聯絡手機":"使用者聯絡手機","使用者稱呼":"使用者稱呼","反饋內容":"反饋內容","反饋時間":"反饋時間","反饋版本":"反饋版本"},{"序號":"0","使用者聯絡手機":"18566925421","使用者稱呼":"李先生","反饋內容":"我是李先生","反饋時間":"2016-03-08 19:22:00.0","反饋版本":"1.0"},{"序號":"1","使用者聯絡手機":"13958756578","使用者稱呼":"王女士","反饋內容":"我是王女士","反饋時間":"2016-02-02 19:22:29.0","反饋版本":"1.0"}]
a:序號 0 1 b:使用者聯絡手機 18566925421 13958756578 c:使用者稱呼 李先生 王女士