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What this is

This file is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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The source code

 *  Copyright 1999-2004 The Apache Software Foundation
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.

// If this class were in a package, it would need to go in the
// corresponding subdirectory

import java.util.Enumeration;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

 * Simple servlet to validate that the Hello, World example can
 * execute servlets.  In the web application deployment descriptor,
 * this servlet must be mapped to correspond to the link in the
 * "index.html" file.
 * @author Craig R. McClanahan 

public final class Hello extends HttpServlet {

     * Respond to a GET request for the content produced by
     * this servlet.
     * @param request The servlet request we are processing
     * @param response The servlet response we are producing
     * @exception IOException if an input/output error occurs
     * @exception ServletException if a servlet error occurs
    public void doGet(HttpServletRequest request,
                      HttpServletResponse response)
      throws IOException, ServletException {

	PrintWriter writer = response.getWriter();

	writer.println("Sample Application Servlet Page");

"); writer.println(""); writer.println(""); writer.println("

Sample Application Servlet

"); writer.println("This is the output of a servlet that is part of"); writer.println("the Hello, World application. It displays the"); writer.println("request headers from the request we are currently"); writer.println("processing."); writer.println("
"); writer.println(""); Enumeration names = request.getHeaderNames(); while (names.hasMoreElements()) { String name = (String) names.nextElement(); writer.println(""); writer.println(" "); writer.println(" "); writer.println(""); } writer.println("
" + name + ":" + request.getHeader(name) + "
"); writer.println(""); writer.println(""); } }
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