HelloServlet


1   package webclient;
2   
3   import java.io.IOException  ;
4   import java.io.PrintWriter  ;
5   import javax.servlet.ServletException  ;
6   import javax.servlet.http.HttpServlet  ;
7   import javax.servlet.http.HttpServletRequest  ;
8   import javax.servlet.http.HttpServletResponse  ;
9   
10  public class HelloServlet extends HttpServlet   {
11      
12      /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
13       * @param request servlet request
14       * @param response servlet response
15       */
16      protected void processRequest(HttpServletRequest   request, HttpServletResponse   response)
17      throws ServletException  , IOException   {
18          String   username = request.getParameter("username");
19          response.setContentType("text/html;charset=UTF-8");
20          PrintWriter   out = response.getWriter();
21          out.println("<html>");
22          out.println("<head>");
23          out.println("<title>HelloServlet</title>");
24          out.println("</head>");
25          out.println("<body>");
26          if (username != null && username.length() > 0) {
27              try {
28                  out.println("<img SRC=\"duke.waving.gif\">");
29                  out.println("<h2><font color=\"black\">");
30                  out.println(getHelloSEIPort().sayHello(username));
31                  out.println("</font></h2>");
32              } catch(java.rmi.RemoteException   ex) {
33                  ex.printStackTrace(out);
34              }
35          } else {
36              out.println("You didn't specify your name.<br/>");
37          }
38          out.println("<a HREF=\"index.jsp\">back</a>");
39          out.println("</body>");
40          out.println("</html>");
41          out.close();
42      }
43      
44      // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
45      /** Handles the HTTP <code>GET</code> method.
46       * @param request servlet request
47       * @param response servlet response
48       */
49      protected void doGet(HttpServletRequest   request, HttpServletResponse   response)
50      throws ServletException  , IOException   {
51          processRequest(request, response);
52      }
53      
54      /** Handles the HTTP <code>POST</code> method.
55       * @param request servlet request
56       * @param response servlet response
57       */
58      protected void doPost(HttpServletRequest   request, HttpServletResponse   response)
59      throws ServletException  , IOException   {
60          processRequest(request, response);
61      }
62      
63      /** Returns a short description of the servlet.
64       */
65      public String   getServletInfo() {
66          return "Short description";
67      }
68      // </editor-fold>
69      
70      private webclient.Hello getHello() {
71          webclient.Hello hello = null;
72          try {
73              javax.naming.InitialContext   ic = new javax.naming.InitialContext  ();
74              hello = (webclient.Hello) ic.lookup("java:comp/env/service/Hello");
75          } catch(javax.naming.NamingException   ex) {
76              
77          }
78          return hello;
79      }
80      
81      private webclient.HelloSEI getHelloSEIPort() {
82          webclient.HelloSEI helloSEIPort = null;
83          try {
84              helloSEIPort = getHello().getHelloSEIPort();
85          } catch(javax.xml.rpc.ServiceException   ex) {
86              
87          }
88          return helloSEIPort;
89      }
90  }
91
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