Redirect jsp page problem

          I have problem when I want to redirect a page, inputparam2test.jsp back to the perious
          page, inputparam1test.jsp. Everything works until I
          add a "if" statement in the inputparam1test.jsp.
          The error is "Error 500--Internal Server Error".
          Can anybody help me out? Thanks a lot!
          inputparam1test.jsp:
          <html>
          <head>
          <title>create a patameter input form</title>
          </head>
          <body>
          <%!
          String dataset;
          String modeltype;
          %>
          <%
          dataset = request.getParameter("dataset");
          modeltype = request.getParameter("modeltype");
          %>
          <center>
          <form action="inputparam2test.jsp" method="post">
          <table cellspacing=10>
          <tr>
          <td colspan=2>
                    Please enter model parameters
               </td>
               </tr>
          <tr>
               <td>
                    Dell LRI
               </td>
               <td>
                    <select name="DellLRI">
                    <option value="1">1
                    <option value="0">0
                    </select>
               </td>
               </tr>
               <%
               if(modeltype.equals("Direct")) {
          out.println("in if");
          %>
               <tr>
               <td>
               </td>
               <td>
                    <input type="submit" value="Next>" name="Next>">
               </td>
               </tr>
          </form>
          </center>
          </body>
          </html>
          inputparam2test.jsp:
          <html>
          <head>
          <title>continue input parameters </title>
          </head>
          <body>
          <%
          response.sendRedirect("inputparam1test.jsp");
          %>
          </body>
          </html>

You do not check if the modelType is null and
          if(modeltype.equals("Direct")) {
          out.println("in if");
          will result in a NullPointerException when it is null.
          Almond Huang <[email protected]> wrote:
          > I have problem when I want to redirect a page, inputparam2test.jsp back to the perious
          > page, inputparam1test.jsp. Everything works until I
          > add a "if" statement in the inputparam1test.jsp.
          > The error is "Error 500--Internal Server Error".
          > Can anybody help me out? Thanks a lot!
          > inputparam1test.jsp:
          > <html>
          > <head>
          > <title>create a patameter input form</title>
          > </head>
          > <body>
          > <%!
          > String dataset;
          > String modeltype;
          > %>
          > <%
          > dataset = request.getParameter("dataset");
          > modeltype = request.getParameter("modeltype");
          > %>
          > <center>
          > <form action="inputparam2test.jsp" method="post">
          > <table cellspacing=10>
          > <tr>
          > <td colspan=2>
          >           Please enter model parameters
          >      </td>
          >      </tr>
          > <tr>
          >      <td>
          >           Dell LRI
          >      </td>
          >      <td>
          >           <select name="DellLRI">
          >           <option value="1">1
          >           <option value="0">0
          >           </select>
          >      </td>
          >      </tr>
          >      <%
          >      if(modeltype.equals("Direct")) {
          > out.println("in if");
          >      }
          > %>
          >      <tr>
          >      <td>
          >      </td>
          >      <td>
          >           <input type="submit" value="Next>" name="Next>">
          >      </td>
          >      </tr>
          > </form>
          > </center>
          > </body>
          > </html>
          > inputparam2test.jsp:
          > <html>
          > <head>
          > <title>continue input parameters </title>
          > </head>
          > <body>
          > <%
          > response.sendRedirect("inputparam1test.jsp");
          > %>
          > </body>
          > </html>
          Dimitri

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at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
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at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
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at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)
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at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:619)
</pre>
Edited by: iceman513 on Aug 11, 2010 7:14 PM
Edited by: iceman513 on Aug 24, 2010 10:32 AM
Edited by: iceman513 on Aug 24, 2010 10:33 AM

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Problem with onload in jsp page

Hi all,
I had two jsp pages, a search and a results page. I need to enter some search criteria in the first page and based on that criteria i will be getting the results in the results jsp. Now, when i click the back button in the results page, i need to go to the search page and the values which i entered in the search page needs to be present there. But the problem is i had a javascript function which runs on loading of the search page. This function will set all the values in this search page to empty whenever we go to the search page. I am calling this javascript function as follows in my search jsp page.
<body onload="setdefaultvalues('<%=name%>');">
I am having the code for the back button in the results page as follows.
<INPUT TYPE="button" VALUE='Back' onClick="javascript:history.go(-1);resetvalue(name);" class="button">
The problem i am facing is whenever i go to the search page by clicking on the back button, the values in the search page are getting empty because of the onload method. There is no way that i can remove this onload method as i require it for setting the values in the search page evrytime i get to that from other modules as it is the main page for my module. So, is there anyway that i can stop this function from executing when i come from the results page or is there any other way that i can store the values in the search page when going from the results page.

i think you really should have the result page include your search page contents rather than having the user need to click back as you'll end up with all sorts of nightmares in caching & session object management to be honest. if the search page is complex use javascript to hide contents and let the users expand them when they want to re-search.
however, if you feel you must i would suggest the following:
in your result page:
session.setAttribute("userQuery","true"); (you probably actually want to put a container object with the query information in here)
in your search page you could have something like:
<body <% session.getAttribute("userQuery")==null { %>onload="setdefaultvalues('<%=name%>');"<% } %>>
-or-
<body onload="setdefaultvalues('<%=name%>',<%=session.getAttribute("userQuery")==null?"true":"false"%>);">
function setdefaultvalues(name,run) { if ( !run ) return;....}
you'll have to decide when to remove the object though cause once its set its there until the session expires or you remove it.
hope that helps, good luck!

Problem in passing data from one .jsp page to another .jsp page

i have a problem here
Actually i have 2 jsp pages. What im trying to do here is actually i want to pass data from the first jsp page to the second for updating
The first jsp page contains data that user wants to update in the form of table.
<td><img src = "edit.gif" alt = "edit" border="0" ><td>
<TD><%= Name %></td>
<TD><%= rs.getInt("Age") %></td>
<TD><%= rs.getString("Gender") %></td>
So this page displays the data that users wants to update plus one image button (edit button). So when user clicks this button, all the data in this page will be brought to the second .jsp page called updatePersonal for updating.
The problem here is that it is not displaying the existing data in the second .jsp page.
The second page basically contains forms
<INPUT TYPE="text" NAME="FirstName" maxlength="30" value = "<%=FirstName%>">
Can someone please help me. I really dont know what to do..How do i get the data displayed in the text field that is passed from the first .jsp page..thankx in advance

Please modify below code to:
td><img src = "edit.gif" alt = "edit" border="0" ><td>
-----------------modified code
td><a href="updatePersonal.jsp?FirstName=<%=rs.getString(FirstName")%">&LastName=<%=rs.getString("LastName")%>&Age=<%=rs.getInt("Age")%>&Gender=<%=rs.getString("Gender")%>"><img src = "edit.gif" alt = "edit" border="0" ></a><td>
I'm sure it works</a>

Forwarding JSP page through requestdispatcher problem in submiting form

Hello everyone,
I am very much new to servlet.
My problem is somewhat this....
when i am forwarding one JSP page by requestdispather , there is no problem.But after that when i am trying to submit one html form written inside the jsp page , the request is not submiting the jsp page rather it resides in the servlet.
The code in servlet is
RequestDispatcher rd =getServletContext().getRequestDispatcher("/applyConfirm.jsp");
rd.forward(request,response);
Now in (applyConfirm.jsp )jsp page one button is there , so when i will click that button the page has to be submitted.But its not submitting rather the request resides in the servlet.
Dose someone will have any idea.
Thanks in advance

First check what sort of button you are using. It should be of "submit" type.
Check the URL to witch URL it is submitting i.e. Action property in <FORM> tag.
Make sure for the URLs in the client i.e HTML ex: href, action, and so on use the thumb rule of prefixing "<%=request.getContextPath()%>/" in your JSP or in servlet add it in the java code.
This should solve the relative URL reference problem.
Hope this helps.
Cheers.

Redirect jsp page problem

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