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Tip of the Day
Language: Java
Expertise: Advanced
Apr 9, 2004

Send an Exception to a JSP Error Page from a Servlet

Use this code to explicitly send an exception to the JSP error page from a servlet:

public void doPost(HttpServletRequest request, HttpServletResponse
response)
      throws  ServletException, IOException {
	...
	//Create your exception
	Exception myException = new Exception    ("error message");
	//Set this request attribute
	request.setAttribute("javax.servlet.jsp.jspException", myException );

	//forward to the error page
                RequestDispatcher rd =
request.getRequestDispatcher("/Error.jsp");
	rd.forward(request, response);
}
The JSP error page simply accesses the implicit object exception to extract the error message.
Massimo Zerbini
 
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