Source code: mypackage/Hello.java
1 /*
2 * Copyright 1999,2004 The Apache Software Foundation.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package mypackage;
18
19 import java.io.IOException;
20 import java.io.PrintWriter;
21 import java.util.Enumeration;
22 import javax.servlet.ServletException;
23 import javax.servlet.http.HttpServlet;
24 import javax.servlet.http.HttpServletRequest;
25 import javax.servlet.http.HttpServletResponse;
26
27
28 /**
29 * Simple servlet to validate that the Hello, World example can
30 * execute servlets. In the web application deployment descriptor,
31 * this servlet must be mapped to correspond to the link in the
32 * "index.html" file.
33 *
34 * @author Craig R. McClanahan <Craig.McClanahan@eng.sun.com>
35 */
36
37 public final class Hello extends HttpServlet {
38
39
40 /**
41 * Respond to a GET request for the content produced by
42 * this servlet.
43 *
44 * @param request The servlet request we are processing
45 * @param response The servlet response we are producing
46 *
47 * @exception IOException if an input/output error occurs
48 * @exception ServletException if a servlet error occurs
49 */
50 public void doGet(HttpServletRequest request,
51 HttpServletResponse response)
52 throws IOException, ServletException {
53
54 response.setContentType("text/html");
55 PrintWriter writer = response.getWriter();
56
57 writer.println("<html>");
58 writer.println("<head>");
59 writer.println("<title>Sample Application Servlet Page</title>");
60 writer.println("</head>");
61 writer.println("<body bgcolor=white>");
62
63 writer.println("<table border=\"0\">");
64 writer.println("<tr>");
65 writer.println("<td>");
66 writer.println("<img src=\"images/tomcat.gif\">");
67 writer.println("</td>");
68 writer.println("<td>");
69 writer.println("<h1>Sample Application Servlet</h1>");
70 writer.println("This is the output of a servlet that is part of");
71 writer.println("the Hello, World application. It displays the");
72 writer.println("request headers from the request we are currently");
73 writer.println("processing.");
74 writer.println("</td>");
75 writer.println("</tr>");
76 writer.println("</table>");
77
78 writer.println("<table border=\"0\" width=\"100%\">");
79 Enumeration names = request.getHeaderNames();
80 while (names.hasMoreElements()) {
81 String name = (String) names.nextElement();
82 writer.println("<tr>");
83 writer.println(" <th align=\"right\">" + name + ":</th>");
84 writer.println(" <td>" + request.getHeader(name) + "</td>");
85 writer.println("</tr>");
86 }
87 writer.println("</table>");
88
89 writer.println("</body>");
90 writer.println("</html>");
91
92 }
93
94
95 }