Error In Jsp Page
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either inside the page or outside the page (such as in a called JavaBean). This section describes the JSP error processing mechanism and provides a simple example. Using JSP Error Pages Any runtime error encountered during execution of a JSP page is jsp error page example handled using the standard Java exception mechanism in one of two ways: You can catch
Web Xml Error Page
and handle exceptions in a Java scriptlet within the JSP page itself, using standard Java exception-handling code. Exceptions you do not catch jsf error page in the JSP page will result in forwarding of the request and uncaught exception to an error page. This is the preferred way to handle JSP errors. You can specify the URL of an error jsp errorpage page by setting the errorPage parameter in a page directive in the originating JSP page. (For an overview of JSP directives, including the page directive, see "Directives". ) In a servlet 2.2 environment, you can also specify a default error page in the web.xml deployment descriptor with instructions such as the following:
Servlet Error Page
page must have a page directive setting the isErrorPage parameter to true. The exception object describing the error is a java.lang.Exception instance that is accessible in the error page through the implicit exception object. Only an error page can access the implicit exception object. (For information about JSP implicit objects, including the exception object, see "Implicit Objects".) See the next section, "JSP Error Page Example", for an example of error page usage. Note: There is ambiguity in the JSP 1.1 specification regarding exception types that can be handled through the JSP mechanism. A page implementation class generated by the OracleJSP translator can handle an instance of the java.lang.Exception class or a subclass, but cannot handle an instance of the java.lang.Throwable class or any subclass other than Exception. A Throwable instance will be thrown by the OracleJSP container to the servlet container. The ambiguity is expected to be addressed in the JSP 1.2 specification. OracleJSP behavior will be modified appropriately in a future release. JSP Error Page Example The following example, nullpointer.jsp, generates an error and uses an error page, myerror.jsp, to output contents of the implicit exception object. Code for nullpointer.jsp
<%@ page errorPage="myerror.jsp" %> Null pointer is generated below: <% String s=null; s.length(); %> Code for myerror.jsp <%@ page isErrorPage=- Life Cycle JSP - Syntax JSP - Directives JSP - Actions JSP - Implicit Objects JSP - Client Request JSP - Server Response JSP jsp iserrorpage - Http Codes JSP - Form Processing JSP - Writing Filters JSP sample jsp error page - Cookies Handling JSP - Session Tracking JSP - File Uploading JSP - Handling Date JSP - Page
Jsp Custom Error Page
Redirect JSP - Hits Counter JSP - Auto Refresh JSP - Sending Email Advanced JSP Tutorials JSP - Standard Tag Library JSP - Database Access JSP - XML Data JSP https://docs.oracle.com/cd/A87860_01/doc/java.817/a83726/basics6.htm - Java Beans JSP - Custom Tags JSP - Expression Language JSP - Exception Handling JSP - Debugging JSP - Security JSP - Internationalization JSP Useful Resources JSP - Questions and Answers JSP - Quick Guide JSP - Useful Resources JSP - Discussion Selected Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is http://www.tutorialspoint.com/jsp/jsp_exception_handling.htm Who JSP - Exception Handling Advertisements Previous Page Next Page When you are writing JSP code, a programmer may leave a coding errors which can occur at any part of the code. You can have following type of errors in your JSP code: Checked exceptions: Achecked exception is an exception that is typically a user error or a problem that cannot be foreseen by the programmer. For example, if a file is to be opened, but the file cannot be found, an exception occurs. These exceptions cannot simply be ignored at the time of compilation. Runtime exceptions: A runtime exception is an exception that occurs that probably could have been avoided by the programmer. As opposed to checked exceptions, runtime exceptions are ignored at the time of compliation. Errors: These are not exceptions at all, but problems that arise beyond the control of the user or the programmer. Errors are typically ignored in your code because you can rarely do anything about an error. For example, if a stack overflow occurs, an error will arise. They are also ign
QuestionsJava Interview QuestionsJDBC Interview QuestionsServlet Interview QuestionsJSP Interview QuestionsStruts2 Interview QuestionsSpring Interview QuestionsHibernate Interview QuestionsJSF Interview QuestionsResourcesStoreHome » Java » Java EE » JSP Exception Handling - JSP Error PageJSP Exception Handling - JSP Error PageSeptember 11, 2016 by http://www.journaldev.com/2049/jsp-exception-handling-jsp-error-page Pankaj 3 Comments Exception handling in JSP is done by JSP exception pages.Exception Handling in JSPSometime back I wrote a post about Servlet Exception Handling and why do we need it. Same explanation is also applicable for JSP pages also and that's why Java EE provides a clear approach for exception handling in JSP using JSP error pages.To handle exceptions thrown error page by the JSP page, all we need is an error page and define the error page in JSP using jsp page directive.JSP Error PageTo create a JSP error page, we need to set page directive attribute isErrorPage value to true, then we can access exception jsp implicit object in the JSP and use it to send customized error message to the jsp error page client.JSP Error Page ConfigurationWe need to set page directive errorPage attribute to define the JSP that will handle any exception thrown by the JSP service method. When JSP Error page is translated to servlet code, it extends org.apache.jasper.runtime.HttpJspBase in Tomcat.Error Page Deployment Descriptor ConfigurationMost of the times, we have a common error page that we want to use for all the JSPs, so rather than configuring it in all the JSPs individually, we can define error page in web.xml with error-page element. We can configure JSP error page to handle other error codes like 404 also.Let's see how all these fit together in a web application.We will create a simple web application JSPExceptionHandling whose project structure will look like below image. The entry point of the application is index.jsp whose code is given below. <%@ page language="java" contentType="text/html; charset=US-ASCII" pageEncoding="US-ASCII"%>