ajax调用servlet并重定向到jsp

这里在下面的代码我想通过ajax调用一个servlet然后我将数据从servlet重定向到jsp.ajax调用servlet工作正常但问题是重定向到jsp页面没有显示在浏览器和同一个jsp当我使用没有ajax的javascript代码时显示页面.

jsp文件中的javascript ajax代码：

function generate(){
...
...
 var url="RedirectServlet";
 var ajax=new AJAXInteraction(url,"RedirectServlet");
 var param    ="FD="+FD+"&TD="+TD+"&actionid="+status+"&usercode="+usercode+"&action=reports"+"";
 ajax.send(param);

....
 }
 function AJAXInteraction(url,actionType) {
     this.url = url;

     var req = init();
   var actionRequested = actionType;
     req.onreadystatechange = processRequest;      
    function init() {
        if (window.XMLHttpRequest) {
            return new XMLHttpRequest();
        } else if (window.ActiveXObject) {
            return new ActiveXObject("Microsoft.XMLHTTP");
        }
     }

     function processRequest () {
        if (req.readyState == 4) {
            if (req.status == 200) {                                
                if(actionRequested=="TestDelegation") {                     
                    PostProcess1(req.responseXML);
                }

            }
        }
     }
     this.send = function(param) {
        req.open("POST",url,true);

        req.setRequestHeader("Content-Type","application/x-www-form-urlencoded");

        req.send(param);


     }
}//end of AJAX Interaction object.

Servlet代码：

protected void doPost(HttpServletRequest request,HttpServletResponse response)
        throws ServletException,IOException
        {
    System.out.println("calling doPost() ");

    response.setContentType("text/html;charset=WINDOWS-1256");
    String action=request.getParameter("action");
    System.out.println(action);

    if(action.equals("reports")){
        System.out.println("inside reports");



        //Getting values from Reports_arb.jsp
        String Fromdate=request.getParameter("FD");
        String Todate=request.getParameter("TD");
        String status=request.getParameter("actionid");
        String usercode=request.getParameter("usercode");

        //placing given values in a session 


        request.setAttribute("FD",Fromdate);
        request.setAttribute("TD",Todate);
        request.setAttribute("actionid",status);
        request.setAttribute("usercode",usercode);


        //Redirecting to showReport_arb.jsp
        //response.sendRedirect("showReport_arb.jsp");

          ServletContext sc = getServletContext();
            sc.getRequestDispatcher("/sample.jsp").forward(request,response);

您需要了解以下事实：当您从ajax发送http请求时,这意味着您在单独的线程中而不是在主线程(您发送请求的页面本身)中发送请求.因此servlet的重定向不会反映在客户端.为了实现这一点,请将要重定向的URL作为对请求的响应发送回来,并且在ajax的成功方法上只需使用java脚本window.location(URL);

在servlet

JSONObject jobj = new JSONObject()
String urlToRedirect = "test.jsp";
jobj.put("url",urlStr);
response.getWriter().write(jobj.toString());

在客户端

$.ajax({
                url: 'servletName',data: {
                    userID: selectedID
                },type: 'post',success: function(data){
                  window.location = data.url;
                } 

            });

原文链接：https://www.f2er.com/ajax/160218.html

ajax调用servlet并重定向到jsp

猜你在找的Ajax相关文章