JSP forward *HELP*

Question

Hi,
Im trying to forward a JSP page to another if user password is blank,,
the code is :
errorString rURL = "myURL";
if (Pass.length() == 0){response.sendRedirect(rURL);}  but I get the following error:
HTTP Status 500 - Internal Server Error
type Exception report
message Internal Server Error
description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Cannot forward after response has been committed
     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684)
     at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:432)
     at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:356)
     at org.apache.jsp.mainController_jsp._jspService(mainController_jsp.java:52)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
Can you please help me..

Answer 1

Try it like this:
if (Pass.length() == 0){
  response.sendRedirect(rURL); 
  return;
} Basically after you redirect/forward from your servlet, you should make sure the execution leaves your servlet/jsp page. Otherwise your page will keep adding to the output, which may result in this sort of error - particularly if it tries to forward/redirect to another page.
if (test){
  response.sendRedirect(...);
  return;
}or
if (test){
  response.sendRedirect(...);
else {
}