Create an error page for JSP pages (original) (raw)

This is an example of how to create an error page in JSP pages. JavaServer Pages (JSP) is a server-side programming technology that enables the creation of dynamic, platform-independent method for building Web-based applications. Creating an error page implies that you should:

Create a jsp page. Inside the <%code fragment%> scriptlet define the java code to be executed.
Add any comments in the page inside the `<%-- ... --%>` tags.
Then create the error page with a message in the <%code fragment%> scriptlet. Declare the page as error page using the <%@ page ... %> directive.

PageWithError.jsp

<%@ page errorPage="errorpage.jsp" %> <%-- NullPointerException if the parameter param does not exist --%> <%= request.getParameter("param").toString() %>

errorpage.jsp

<%@ page isErrorPage="true" %>

An error has occurred. The Exception was: <%= exception %>

URL:

http://myhost:8080/jcgsnippets/PageWithError.jsp

Output:

An error has occurred. The Exception was: java.lang.NullPointerException

This was an example of how to create an error page for JSP pages.

Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.