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
<%-- ... --%> - 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.
