Use this code to explicitly send an exception to the JSP error page from a servlet:
public void doPost(HttpServletRequest request, HttpServletResponseresponse) 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.
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