Customized Error Page for java application

Sometimes application will throw exception page. thinking of addin a custom f开发者_JAVA百科riendly error page which user can report to us then we can trace easily.

Initially idea is to add a issue ID, date & time.

Anyone have any suggestions?

Assuming Tomcat Servlet container:

You can define your own custom error pages in your web.xml file. In the example shown below, we define 2 web pages -- server_error.html and file_not_found.html -- which will be displayed when the server encounters an error 500 or an error 404 respectively.

 <error-page>
    <error-code>500</error-code>
    <location>/server_error.html</location>
 </error-page>
 <error-page>
    <error-code>404</error-code>
    <location>/file_not_found.html</location>
 </error-page>   

Reference: http://linux-sxs.org/internet_serving/c581.html

The best way to handle errors will depend on your servlet container (Tomcat, WebSphere, etc). But there is a generic way to handle JSP errors which you should work on any container.

If you put this at the top of your JSP pages:

<%@ page errorPage="errorpage.jsp"%>

then if an error occurs on that JSP page the user will be redirected to errorpage.jsp. You can then put the following page directive in your error page JSP:

<%@ page isErrorPage="true" %>

That makes an javax.servlet.jsp.ErrorData object available to the error page code, which you could log along with an ID, date & time. Read more at http://download.oracle.com/javaee/5/tutorial/doc/bnahe.html#bnahi

However as suggested by The MYYN in another answer, depending on your framework there are probably other options for error handling, and they might be more robust.