Error Handling Jsp Example
Contents |
▼ JSP Tutorial JSP Introduction Life cycle of JSP JSP API JSP in Eclipse JSP scripting elements JSP scriptlet tag JSP expression tag JSP exception handling in jsp example declaration tag 9 Implicit Objects JSP Request JSP Response JSP Config JSP
Jsp Error Handling And Debugging
Application JSP Session JSP PageContext JSP Page JSP Exception JSP Directive Elements JSP page directive JSP include
Event Handling In Jsp Example
directive JSP taglib directive JSP Exception Action Elements jsp:forward jsp:include Java Bean class jsp:useBean set & getProperty Displaying applet in JSP Expression Language MVC in JSP JSTL JSP Custom
Error Handling Servlet
tags Example of Custom Tag Attributes Iteration Custom URI JSP Pagination JSP Pagination Example JSP CRUD JSP CRUD Example Development in JSP Registration Form Login Form Uploading File Downloading File Interview Questions JSP Quiz next>> <
ContentHandling JSP Page Errors Any number of exceptions error handling javascript can arise when a JSP page is executed. To specify error handling java that the web container should forward control to an error page if an exception j2ee error handling occurs, include the following page directive at the beginning of your JSP page: <%@ page errorPage="file-name" %> The Duke’s Bookstore application page tut-install/javaeetutorial5/examples/web/bookstore2/web/template/preludeErrorPage.jspf contains http://www.javatpoint.com/exception-handling-in-jsp the directive: <%@ page errorPage="errorpage.jsp"%> The following page directive at the beginning of tut-install/javaeetutorial5/examples/web/bookstore2/web/error/errorpage.jsp indicates that it is serving as an error page: <%@ page isErrorPage="true" %> This directive makes an object of type javax.servlet.jsp.ErrorData available to the error page so that you can retrieve, interpret, and possibly display https://docs.oracle.com/cd/E19575-01/819-3669/bnahi/index.html information about the cause of the exception in the error page. You access the error data object in an EL (see Unified Expression Language) expression by way of the page context. Thus, ${pageContext.errorData.statusCode} retrieves the status code, and ${pageContext.errorData.throwable} retrieves the exception. You can retrieve the cause of the exception using this expression: ${pageContext.errorData.throwable.cause} For example, the error page for Duke’s Bookstore is as follows: <%@ page isErrorPage="true" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
: ${pageContext.errorData.throwable.cause} Note – You can also define error pages for the WAR that contains a JSP page. If error pages are defined for both the WAR and a JSP page, the JSP page’s error page takes precedence. Previous: BufferingNext: Creating Static Content © 2010, Oracle Corporation and/or its affiliates
through exception handling in JSP, let's understand what is exception and how it is different from errors. Exception: These are nothing but the abnormal conditions which http://beginnersbook.com/2013/11/jsp-exception-handling/ interrupts the normal flow of execution. Mostly they occur because of the wrong http://www.avajava.com/tutorials/lessons/how-do-i-create-a-jsp-error-page-to-handle-exceptions.html data entered by user. It is must to handle exceptions in order to give meaningful message to the user so that user would be able to understand the issue and take appropriate action. Error: It can be a issue with the code or a system related issue. We should not handle error handling errors as they are meant to be fixed. Methods of handling exceptions: We can handle exceptions using the below two methods. Exception handling using exception implicit object Exception handling using try catch blocks within scriptlets Exception handling using exception implicit object In the below example - we have specified the exception handling page using errorPage attribute of Page directive. If any exception occurs in handling in jsp the main JSP page the control will be transferred to the page mentioned in errorPage attribute. The handler page should have isErrorPage set to true in order to use exception implicit object. That's the reason we have set the isErrorPage true for errorpage.jsp. index.jsp <%@ page errorPage="errorpage.jsp" %>
errorpage.jsp
An exception has occurred in the index.jsp Page. Please fix the errors. Below is the error message: <%= exception %> output: Exception handling using try catch blocks within scriptlets We have handled the exception using try catch blocks in the below example. Since try catch blocks are java code so it must be placed inside sciptlet. In the below example I have declared an array of length 5 and tried to access the 7th element which doesn't exist. It caused Array Index out of bounds exception. error.jspTutorial Categories: Ajax (1)Ant (16)Apache Web Server (8)Bioinformatics (10)Cascading Style Sheets (47)Classes and Objects (14)Database (13)Design Patterns (22)Eclipse (39)Files (62)General Java (69)JSPs (9)Java Basics (11)Linux (23)Logging (5)Maven (88)Search (12)Servlets (20)Struts (1)Text (19)Tomcat (8)Version Control (8)Windows (2)XML (1) How do I create a JSP error page to handle exceptions? Author: Deron Eriksson Description: This Java tutorial describes how to create a JSP error page to handle exceptions. Tutorial created using: Windows XP || JDK 1.5.0_09 || Eclipse Web Tools Platform 2.0 (Eclipse 3.3.0) || Tomcat 5.5.20 Page: 1 2> When an exception is thrown in your web application and it is not caught, you will typically see the result featuring the exception displayed in your browser window, as shown here: Rather than displaying the above default page when an exception occurs, you can redirect the user to a custom-written error page for a particular type of exception. You can do this via the error-page element in web.xmlW, in which you can specify an exception-type and the location of the resource where a user should be sent if an error occurs. In this example, I specified the exception-type as java.lang.Throwable so that all exceptions would be sent to the error.jsp page.