Jquery定时无刷新更新页面数据

js代码：

$(document).ready(function () {
setInterval(refreshMeetInfo, 5000);
});
function refreshMeetInfo() {
$.ajax({
   type:'post',
   url:'bookShop.do?parameter=refreshMeetInfo',
   cache:false,
       async:true,
       success:function(booklist){
       var doc=booklist.documentElement;
       var nodelist=doc.getElementsByTagName("book");
       var htmlstr="";
       for(var i=0;i<nodelist.length;i++)
          {
             var author=nodelist[i].getElementsByTagName("author")[0].text;
             var bookname=nodelist[i].getElementsByTagName("bookName")[0].text;
             var bookid=nodelist[i].getElementsByTagName("bookId")[0].text;
             var id=nodelist[i].getElementsByTagName("Id")[0].text;
             var booknumber=nodelist[i].getElementsByTagName("booknumber")[0].text;
             var bookprice=nodelist[i].getElementsByTagName("bookprice")[0].text;
  
             htmlstr+='<tr><td>'
                    +bookid
                    +'</td>'
                    +'<td>'
                    +bookname
                    +'</td>'
                    +'<td>'
                    +author
                    +'</td>'
                    +'<td>'
                    +bookprice
                    +'</td>'
                    +'<td>'
                    +"<a href=bookShop.do?parameter=getBookListCar&bookid="+bookid+">"
                    +"shoping"
                    +"</a></td>"
                   
                    ;
            htmlstr+='</tr>'
          }
          
        $("#memberList").html(htmlstr);
       }
     
});
}



action代码：
public ActionForward refreshMeetInfo(ActionMapping mapping,
ActionForm form, HttpServletRequest request,
HttpServletResponse response) throws Exception {
List<Bookshoping> book = bookShopListBiz.getBookShopList();
Bookshoping bs = new Bookshoping();
Document doc = DocumentHelper.createDocument();
Element el = doc.addElement("rsp");
Element bk = null;
for (int i = 0; i < book.size(); i++) {

bs = (Bookshoping) book.get(i);
bk = el.addElement("book");
bk.addElement("author").setText(bs.getAuthor());
bk.addElement("bookName").setText(bs.getBookname());
bk.addElement("bookId").setText(bs.getBookid().toString());
bk.addElement("Id").setText(bs.getId().toString());
bk.addElement("booknumber").setText(bs.getNumber().toString());
bk.addElement("bookprice").setText(bs.getPrice().toString());
System.out.println("***************"+bs.getPrice().toString());
}
     

writerXML(response, doc);

return null;
}