KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > converter > ConverterServlet


1 /*
2  * ConverterServlet.java
3  *
4  * Created on 04 May 2005, 18:38
5  */
6
7 package converter;
8
9 import java.io.*;
10 import java.net.*;
11
12 import javax.servlet.*;
13 import javax.servlet.http.*;
14
15 /**
16  *
17  * @author Administrator
18  * @version
19  */
20 public class ConverterServlet extends HttpServlet {
21     
22     /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
23      * @param request servlet request
24      * @param response servlet response
25      */
26     protected void processRequest(HttpServletRequest request, HttpServletResponse response)
27     throws ServletException, IOException {
28         response.setContentType("text/html;charset=UTF-8");
29         PrintWriter out = response.getWriter();
30         out.println("<html>");
31         out.println("<head>");
32         out.println("<title>Servlet ConverterServlet</title>");
33         out.println("</head>");
34         out.println("<body>");
35         out.println("<h1><b><center>Converter</center></b></h1>");
36         out.println("<hr>");
37         out.println("<p>Enter an amount to convert:</p>");
38         out.println("<form method=\"get\">");
39         out.println("<input type=\"text\" name=\"amount\" size=\"25\">");
40         out.println("<br>");
41         out.println("<p>");
42         out.println("<input type=\"submit\" value=\"Submit\">");
43         out.println("<input type=\"reset\" value=\"Reset\">");
44         out.println("</form>");
45         String JavaDoc amount = request.getParameter("amount");
46         if ( amount != null && amount.length() > 0 ) {
47             try {
48                 converter.ConverterRemote converter;
49                 converter = lookupConverterBean();
50                 
51                 java.math.BigDecimal JavaDoc d = new java.math.BigDecimal JavaDoc(amount);
52                 out.println("<p>");
53                 out.println("<p>");
54                 out.println(amount + " Dollars are " + converter.dollarToYen(d) + " Yen.");
55                 out.println("<p>");
56                 out.println(amount + " Yen are " + converter.yenToEuro(d) + " Euro.");
57                 
58                 converter.remove();
59             } catch (Exception JavaDoc e){
60                 out.println("Cannot lookup or execute EJB!");
61             }
62             
63         }
64         out.println("</body>");
65         out.println("</html>");
66         out.close();
67     }
68     
69     // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
70 /** Handles the HTTP <code>GET</code> method.
71      * @param request servlet request
72      * @param response servlet response
73      */
74     protected void doGet(HttpServletRequest request, HttpServletResponse response)
75     throws ServletException, IOException {
76         processRequest(request, response);
77     }
78     
79     /** Handles the HTTP <code>POST</code> method.
80      * @param request servlet request
81      * @param response servlet response
82      */
83     protected void doPost(HttpServletRequest request, HttpServletResponse response)
84     throws ServletException, IOException {
85         processRequest(request, response);
86     }
87     
88     /** Returns a short description of the servlet.
89      */
90     public String JavaDoc getServletInfo() {
91         return "Short description";
92     }
93     // </editor-fold>
94
95     private converter.ConverterRemote lookupConverterBean() {
96         try {
97             javax.naming.Context JavaDoc c = new javax.naming.InitialContext JavaDoc();
98             Object JavaDoc remote = c.lookup("java:comp/env/ejb/ConverterBean");
99             converter.ConverterRemoteHome rv = (converter.ConverterRemoteHome) javax.rmi.PortableRemoteObject.narrow(remote, converter.ConverterRemoteHome.class);
100             return rv.create();
101         } catch(javax.naming.NamingException JavaDoc ne) {
102             java.util.logging.Logger.getLogger(getClass().getName()).log(java.util.logging.Level.SEVERE,"exception caught" ,ne);
103             throw new RuntimeException JavaDoc(ne);
104         } catch(javax.ejb.CreateException JavaDoc ce) {
105             java.util.logging.Logger.getLogger(getClass().getName()).log(java.util.logging.Level.SEVERE,"exception caught" ,ce);
106             throw new RuntimeException JavaDoc(ce);
107         } catch(java.rmi.RemoteException JavaDoc re) {
108             java.util.logging.Logger.getLogger(getClass().getName()).log(java.util.logging.Level.SEVERE,"exception caught" ,re);
109             throw new RuntimeException JavaDoc(re);
110         }
111     }
112 }
113
Popular Tags