How can I print error stack trace in JSP page?

Question

I have set my error page like this in web.xml:

 
  java.lang.Exception
  /erro         


        

Answer 1

The following parameters will be set by the container when request is forwarded to the error page.

• javax.servlet.error.status_code
• javax.servlet.error.exception
• javax.servlet.error.message
• javax.servlet.error.request_uri
• javax.servlet.error.servlet_name
• javax.servlet.error.exception_type

In your error JSP do this,

<%request.getAttribute("javax.servlet.error.exception").printStackTrace(new java.io.PrintWriter(out))%>;

Or Else If your error page is defined as Error page with Page Directive like,

<%@ page isErrorPage="true" import="java.io.*"%>

The exception scripting variable will be declared in the JSP. You can printing the scripting variable using a scriptlet using,

exception.printStackTrace(new java.io.PrintWriter(out));

Or,

    exception.printStackTrace(response.getWriter())