Problem in Using Ajax within JSP

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • JagPeram
    New Member
    • Jan 2007
    • 13
    #1

    Problem in Using Ajax within JSP

    Is it Possible To return a xml object from a jsp file?
    i tried. but i get an error. i have pasted the code & error below.

    Code :
    <body>
    <table width="100%">
    <tr>
    <td>
    <%
    String testOne = request.getPara meter("HeyYou") ;
    response.setCon tentType("appli cation/xml");
    response.setHea der("Cache-Control", "no-cache");
    response.getWri ter().write("<t estValue>"+test One+"</testValue>");
    %>
    </td>
    </tr>
    </table>
    </body>

    Exception :

    The XML page cannot be displayed
    Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later.
    --------------------------------------------------------------------------------

    Only one top level element is allowed in an XML document. Error processing resource
    Tags: None
    • acoder
      Recognized Expert MVP
      • Nov 2006
      • 16032
      #2
      If the XML is incorrect, it's not going to work. To correct your XML, ask in the XML forum. If you're using Ajax, that's client-side+server-side. You're showing the JSP.

      Also, for XML, you can't put it in a table. Form a proper XML document in a JSP file, then from the client-side use an XMLHttpRequest object to request the JSP response. Finally parse the reponse text and display on the client-side.

      Perhaps, you should study Ajax/XML further, see here.

        Comment

        • JagPeram
          New Member
          • Jan 2007
          • 13
          #3
          Dear moderator,
          thanx for the reply.
          Actually i have worked with ajax. In the jsp, i 'll be writing the script that forms the xmlhttprequest object, and i 'll call a url wich corressponds to java code, where i 'll do my server side activities and then return it to jsp as a xml object. and in the jsp again i 'll parse the responseXML and i'll put it in the form.

          But for the application, which i'm trying now is to
          i'm passing a jsp file as a url in ajax in a jsp file SampleJsp.jsp.
          ex:
          var url = "myjsp.jsp?myCo de=1";
          req.open("GET", url, true);

          And in myjsp.jsp,
          i'm using the javacode in myjsp.jsp file to return a xmlresponse
          ex:
          response.setCon tentType("html/xml");
          response.setHea der("Cache-Control", "no-cache");
          response.getWri ter().write("<t estValue>"+requ est.getParamete r("myCode")+" </testValue>");

          Now, im trying to parse the responseXML in SampleJsp.jsp
          ex:
          var responseValue = responseXML.get ElementsByTagNa me("testValue" )[0];

          The problem is i'm getting a responseValue as a null object.
          My doubt is whether a jsp can return a responseXML .

            Comment

            • acoder
              Recognized Expert MVP
              • Nov 2006
              • 16032
              #4
              Originally posted by JagPeram
              The problem is i'm getting a responseValue as a null object.
              My doubt is whether a jsp can return a responseXML .
              For that, you'll have to ask in the Java forum. All JSP questions are answered in the Java forum.

              Why don't you try a simple response first? If that works then you can build on it. If you've already done this, then you need to find out about JSP and XML, but I think it should be able to do it.

              Also, one last thing, don't forget that you should add:
              Code:
              req.send(null);
              when making the request to the server. Also, you should have an onreadystatecha nge event handler for the Ajax to work.

                Comment

                • JagPeram
                  New Member
                  • Jan 2007
                  • 13
                  #5
                  Dear Moderator,

                  Thanx again for replying.

                  Now i have figured that the problem is in returing a xml object from another jsp file instead of java file. And there is no problem with implementing ajax, coz i'm getting a response object. but it is null.

                  As per ur suggestion,I 'll post my question in jsp or java group.

                  - Jagadesh

                    Comment

                    Previous template Next
                    Working...