Servlet Error Display : Error Page « Servlet

Servlet Error Display : Error Page « Servlet « Java Tutorial

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Java Tutorial » Servlet » Error Page

25. 18. 2. Servlet Error Display


import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import java.util.*;



public class MyServlet extends HttpServlet {

  public void doGet(HttpServletRequest req, HttpServletResponse res) 

                               throws ServletException, IOException {

    res.setContentType("text/html");

    PrintWriter out = res.getWriter();



    String code = null, message = null, type = null;

    Object codeObj, messageObj, typeObj;



    codeObj = req.getAttribute("javax.servlet.error.status_code");

    messageObj = req.getAttribute("javax.servlet.error.message");

    typeObj = req.getAttribute("javax.servlet.error.exception_type");



    if (codeObj != null) code = codeObj.toString();

    if (messageObj != null) message = messageObj.toString();

    if (typeObj != null) type = typeObj.toString();



    String reason = (code != null ? code : type);



    out.println("<HTML>");

    out.println("<HEAD><TITLE>" + reason + ": " + message + "</TITLE></HEAD>");

    out.println("<BODY>");

    out.println("<H1>" + reason + "</H1>");

    out.println("<H2>" + message + "</H2>");

    out.println("<HR>");

    out.println("<I>Error accessing " + req.getRequestURI() + "</I>");

    out.println("</BODY></HTML>");

  }

}


<?xml version="1.0" encoding="ISO-8859-1"?>



<!DOCTYPE web-app

    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"

    "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">



<web-app>

    <servlet><servlet-name>MyServletName</servlet-name>

             <servlet-class>MyServlet</servlet-class>



             

    </servlet>

    

    <servlet-mapping><servlet-name>MyServletName</servlet-name>

        <url-pattern>/index.html</url-pattern>

    </servlet-mapping>

</web-app>

Download: ServletErrorDisplay.zip( 89 k)

25. 18. Error Page
	25. 18. 1.	Servlet Error Page
	25. 18. 2.	Servlet Error Display

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