Error-page Servlet Exception
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Servlet Error Page Redirect
2016 by Pankaj 13 Comments Today we will look into Servlet servlet 3.0 error page Exception and Error Handling. Sometime back I wrote a post about Exception Handling in Java but when it
Servlet Filter Redirect To Error Page
comes to web application, we need more than normal exception handling in java.Servlet ExceptionIf you notice, doGet() and doPost() methods throw javax.servlet.ServletException and IOException, let's see what happens when servlet exception handling we throw these exception from our application. I will write a simple servlet that will throw the ServletException. package com.journaldev.servlet.exception; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet("/MyExceptionServlet") public class MyExceptionServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { throw new ServletException("GET exception handling in servlet and jsp method is not supported."); } } Now when we invoke this servlet through browser with GET method, we get response like below image.Since browser understand only HTML, when our application throw exception, servlet container processes the exception and generate a HTML response. This logic is specific to servlet container. I am using tomcat and getting this error page. If you will use some other servers like JBoss or Glassfish, you might get different error HTML response.The problem with this response is that it's of no value to user. Also it's showing our application classes and server details to user that makes no sense to user and it's not good from security point of view.Servlet ErrorI am sure you must have seen 404 error when you are trying to hit a URL that doesn't exists. Let's see how our servlet container responds to 404 error. If we send request for an invalid URL, we get response HTML like below image.Again it's a generic HTML generated by server on our application behalf and hold little to
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Web.xml Error-page Exception-type
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Web.xml Error-page Example
Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign http://www.journaldev.com/1973/servlet-exception-and-error-handling-example-tutorial up How to Properly Handle Exceptions in a JSP/Servlet App? up vote 9 down vote favorite 3 How do you properly handle errors encountered in a servlet? Right now, the app that I inherited (uses only plain JSP/Servlet) has a superclass called Controller which extends HttpServlet and which all other servlets extend from. In that Controller class is a try and catch block http://stackoverflow.com/questions/6182771/how-to-properly-handle-exceptions-in-a-jsp-servlet-app like the following: try { // execute doPost or doGet here } catch (Exception e) { // show a generic error page } Is this the proper way of doing it? It seems clunky and doesn't seem to always work. I'm only an intern so I don't have a lot of experience with this. Any advice? I'm trying to make the app for robust.. java jsp servlets share|improve this question asked May 31 '11 at 3:37 Damian Wells 48115 A related question that gives an example of handling exceptions in a filter, which is another option in addition to the answer below (that question is in the context of Spring but still applies). –Jason C Aug 30 at 14:31 add a comment| 4 Answers 4 active oldest votes up vote 16 down vote accepted The standard thing to do is have your Servlet's doXxx() method (eg. doGet(), doPost(), etc.) throw a ServletException and allow the container to catch and handle it. You can specify a custom error page to be shown in WEB-INF/web.xml using the
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of http://stackoverflow.com/questions/26801038/how-to-redirect-to-error-page-when-exception-occurs-from-servlet this site About Us Learn more about Stack Overflow the company Business http://www.eclipse.org/jetty/documentation/9.3.x/custom-error-pages.html Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign error page up How to redirect to error page when exception occurs from servlet? up vote 3 down vote favorite 1 I am writing a servlet, in that if any exception occurs i donэt want to display exception/error message on browser, so I will redirect to my customized error page. So I have done like this: protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException servlet error page { try{ //Here is all code stuff }catch(Exception e){ request.getRequestDispatcher("/ErrorPage.jsp").forward(request, response); e1.printStackTrace(); } Is this the correct way, if I am wrong please correct me and if there is any better mechanism please tell me. java jsp servlets error-handling jstl share|improve this question edited Nov 11 '14 at 9:13 Roman C 34.3k133559 asked Nov 7 '14 at 12:13 Raghu 4491926 Duplicate of stackoverflow.com/q/7066192 Performing forward() as in your snippet and in the answer below is at least wrong. If you really want to do it programmatically, you should be using sendError(), not forward(). –BalusC Jul 1 at 7:25 add a comment| 3 Answers 3 active oldest votes up vote 1 down vote accepted Only way to handle it in a generic way is to use web.xml like below:
versioned snapshots for indefinite support ... scalability guidance for your apps and Ajax/Comet projects ... development services for sponsored feature development Creating Custom Error PagesDefining error pages in web.xmlConfiguring error pages context filesCustom ErrorHandler classServer level 404 errorThe following sections describe several ways to create custom error pages in Jetty.Defining error pages in web.xmlYou can use the standard webapp configuration file located in webapp/WEB-INF/web.xml to map errors to specific URLs with the error-page element. This element creates a mapping between the error-code or exception-type to the location of a resource in the web application.error-code - an integer valueexception-type - a fully qualified class name of a Java Exception typelocation - location of the resource in the webapp relative to the root of the web application. Value should start with /.Error code example: