Response not redirecting to errorPage.jsp which is declared in web.xml

[murali jackson]

Hi All,

I am trying to understand the redirection to errorpages set in web.xml.
I have written a sample program where i intentionally throw exception to see if my error page is displayed or not.
Its not getting displayed instead i get a standard page not found error.
Please advise .

My XML, Directory Structure and Servlet Code is below

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
   <servlet>
      <servlet-name>internalname1</servlet-name>
      <servlet-class>com.example.web.BeerSelect</servlet-class>
   </servlet>
   <servlet-mapping>
    <servlet-name> internalname1 </servlet-name>
   <url-pattern>/dscfdfdcv</url-pattern>
   </servlet-mapping>
   
   <context-param> 
   <param-name>uname</param-name>
   <param-value>Yasha@89</param-value>
   </context-param>
   <context-param> 
   <param-name>password</param-name>
   <param-value>Yasha@89</param-value>
   </context-param>

   <context-param> 
   <param-name>host</param-name>
   <param-value>jdbc:mysql://localhost:1527/Employee</param-value>
   </context-param>

    <welcome-file-list>
    <welcome-file>form.html</welcome-file>
    </welcome-file-list>
    
   <error-page>
    <exception-type>java.lang.Exception</exception-type>
    <location>/errorPage.jsp</location>
</error-page>
  
   
</web-app>

package com.example.web;

import javax.servlet.*;
import javax.servlet.http.*;

import com.example.model.BeerAdvice;

import java.io.*;

public class BeerSelect extends HttpServlet {

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws IOException, ServletException {

		HttpSession session = request.getSession();

		System.err.println("This is a new session");

		File f = new File("a.txt");
		String FILENAME = "E:\\test\\filename.txt";
		f.getPath();

		BufferedReader br = null;
		FileReader fr = null;

		fr = new FileReader(FILENAME);
		br = new BufferedReader(fr);

		String sCurrentLine;

		br = new BufferedReader(new FileReader(FILENAME));

		while ((sCurrentLine = br.readLine()) != null) {
			System.out.println(sCurrentLine);
		}

		RequestDispatcher rd = request.getRequestDispatcher("result.jsp");
		rd.forward(request, response);

	}

}

Directory Structure

Select --- project Name
|
|
WebContent
|
|
errorPage.jsp

[K. Tsang]

Does your result.jsp page have the errorPage attribute defined?

<%@ page contentType="text/html" pageEncoding="UTF-8" 
session="false" errorPage="error.jsp"%>

And where are you explicitly throwing exception in your program? in the servlet?

[murali jackson]

K. Tsang wrote:Does your result.jsp page have the errorPage attribute defined?

<%@ page contentType="text/html" pageEncoding="UTF-8" 
session="false" errorPage="error.jsp"%>

And where are you explicitly throwing exception in your program? in the servlet?

Hi Sang,

Yes, im throwing exception inside my servlet  by using the  below statement.

String FILENAME = "E:\\test\\filename.txt";

There is no such file name in the path, so i get an error in the console stating no file found IO exception which is expected.
But I am expecting the server will show the error.jsp page as per the below declaration in web.xml.
But somehow thats not happening, please advise.

 

<error-page>
    <exception-type>java.lang.Exception</exception-type>
    <location>/errorPage.jsp</location>
</error-page>

[K. Tsang]

Try changing the web.xml to IOException and see that works.

Honestly I can't remember if you need to specify each exception type to work.