Error Page Servlet
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- Internationalization Servlet Useful Resources Servlets - Questions and Answers Servlets - Quick Guide Servlets - Useful Resources Servlets - Discussion Selected Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who Servlets - Exception Handling Advertisements Previous Page Next Page When a servlet javax servlet error status code throws an exception, the web container searches the configurations in web.xml that use the exception-type element for a match with the thrown exception type. You would have to use the error-page element in web.xml to specify the invocation of servlets in response to certain exceptions or HTTP status codes. web.xml Configuration: Consider, you have an ErrorHandler servlet which would be called whenever there is any defined exception or error. Following would be the entry created in web.xml.
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Servlet Filter Redirect To Error Page
TutorialServlet Exception and Error Handling Example TutorialJuly 14, 2016 by Pankaj 13 Comments
Servlet Error An Exception Occurred
Today we will look into Servlet Exception and Error Handling. Sometime back I wrote a post about Exception Handling in Java http://www.tutorialspoint.com/servlets/servlets-exception-handling.htm but when it 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 we throw these exception from our application. I will write http://www.journaldev.com/1973/servlet-exception-and-error-handling-example-tutorial 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 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
Servlet Errors Any number of exceptions can occur when a servlet executes. error page When an exception occurs, the web container generates a default page containing the message A Servlet Exception Has Occurred But you can also specify that error page servlet the container should return a specific error page for a given exception. Review the deployment descriptor file included with the example to learn how to map the exceptions exception.BookNotFound, exception.BooksNotFound, and exception.OrderException returned by the Duke’s Bookstore application to errorpage.html. See Mapping Errors to Error Screens for instructions on how to specify error pages using NetBeans IDE. Previous: Handling Servlet Life-Cycle EventsNext: Sharing Information © 2010, Oracle Corporation and/or its affiliates
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