ServletException

[kwame Iwegbue]

Can someone please help with this problem.
I have a search field in a JSP page. when the submit button is pressed the servlet responds appropriately. However if 'Enter" is pressed with caret in search field, I get "javax.servlet.ServletException"

this is the complete report:

  javax.servlet.ServletException: Class ` ' was not found in classpath.
Classes normally belong in /WEB-INF/classes.
at com.caucho.server.http.Application.instantiateServlet(Application.java:3198)
at com.caucho.server.http.Application.createServlet(Application.java:3104)
at com.caucho.server.http.Application.loadServlet(Application.java:3065)
at com.caucho.server.http.QServletConfig.loadServlet(QServletConfig.java:435)
at com.caucho.server.http.Application.getFilterChainServlet(Application.java:2809)
at com.caucho.server.http.Invocation.service(Invocation.java:311)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:222)
at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:103)
at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:80)
at hopenet.PatientServlet.doGet(PatientServlet.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:126)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
at com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
at com.caucho.server.http.Invocation.service(Invocation.java:315)
at com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:346)
at com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:274)
at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
at java.lang.Thread.run(Thread.java:595)
  

[David O'Meara]

hopenet.PatientServlet.doGet(PatientServlet.java:73)

Well, your Servlet is getting called. My guess is that it is a deploym,ent issue: you haven't included all of the classes and libraries required at runtime.

[kwame Iwegbue]

My guess is that it is a deploym,ent issue: you haven't included all of the classes and libraries required at runtime.

The thing is, if that were the case, then the servlet wouldn't run when i click on the submit button with the mouse. But it does run!

In other words the exception is only being thrown when i use the "Enter" button on the keyboard.

I'm sure there must be some really simple explanation for this behaviour, but right now i'm totally stumped

[David O'Meara]

Well what is on line 73? You're probably going to need to provide more information for us, like the HTML page and srevlet listing, or atleast parts of them.

[Paul Clapham]

From the stack trace you can see that line 73 is calling a method called "forward". Perhaps Kwame is trying to forward to a URL that is blank, or something like that. Investigating the URL would be what I would do next.

[Eddy Lee Sin Ti]

Is it possible for you to post your servlet code? It would be helpful.

[kwame Iwegbue]

Thanks guys. This is the servlet code:

  
package pack;
 
import java.io.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
import pack.beans.*;
import pack.utils.*;
 
public class PatientServlet extends HttpServlet {
  public void doGet(HttpServletRequest request,
                     HttpServletResponse response)
      throws ServletException, IOException {
      
    response.setContentType("text/html");
    String address=" ";
    String userid;
    PatientBean pbean;
    Patient_DB pdb;
 
    pbean = new PatientBean();
    HttpSession session = request.getSession();
    userid =  (String) session.getAttribute("userid");
    BeanUtilities.populateBean(pbean, request);
    pdb = new Patient_DB();
    
      if (request.getParameter("search") != null)
      {
      pbean.setSocial(request.getParameter("social").trim());
      
      if (pbean.getSocial().equals(" "))
      {
      new MessageUtil().setErrorMessage("PLEASE ENTER SOCIAL SECURITY NO.!", "/search.jsp",
  request, response);
       }
     else if (pbean.getSocial().indexOf("-",0) < 3)
       {
 new MessageUtil().setErrorMessage("ENTER SOCIAL AS ###-##-#### ", "/search.jsp",
  request, response);
       }
       pbean = pdb.getInfo(pbean);
       address ="/log.jsp";
      }
      
     request.setAttribute("pbean", pbean);
     RequestDispatcher dispatcher = request.getRequestDispatcher(address);
     dispatcher.forward(request, response);
      }
      
}  

...and this is the block of html from the jsp page

  <div id="formcontainer">
<form action="/servlet/pack.PatientServlet" method="get">
<div class="clearfix">
<label>Social Security Number</label><input type="text" name="social" value="" />
<input type="submit" name="search"  value="Find" />
</div>
 
</form>
</div><!--end formcontainer-->  

recall that this all works perfectly when the "Find" button is clicked with mouse, but not when "Enter" is pressed on keyboard!!!

i noticed something. when "Enter" is pressed, the URL dosen't containt the name of the "Find" button, which is "search", but this is included in the url when the button is explicitly clicked on!?
[ March 19, 2006: Message edited by: kwame Iwegbue ]

[David O'Meara]

If 'search' is null then 'address' doesn't get set. This could be caused by (for instance) having two forms and having the enter key submitting the other form.

[kwame Iwegbue]

Thank you so much David!!!

I simply wasn't handling the case where "search" is null.

I know this is not strictly a servlet question, but how then do i make the button send its name to the servlet?