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Internationalization

The J2EE application client and Web client distributed with the Duke's Bank application are internationalized. All strings that appear in the user interfaces are retrieved from resource bundles. The administration client uses resource bundles named AdminMessages_*.properties. The Web client uses resource bundles named WebMessages_*.properties. Both clients are distributed with English and Spanish resource bundles.

The application client retrieves locale information from the command line. For example, to use the Spanish resource bundle, invoke the application like this:

runclient -client BankApp.ear -name BankAdmin es
 

The administration client class BankAdmin creates a ResourceBundle with a locale created from the command-line arguments:

//Constructor	
public BankAdmin(Locale currentLocale) {	
   //Internationalization setup	
   messages = ResourceBundle.getBundle("AdminMessages",	
   currentLocale);
 

The Web client Dispatcher component retrieves the locale (set by a browser language preference) from the request, opens the resource bundle, and then saves the bundle as a session attribute:

ResourceBundle messages = (ResourceBundle)session.	
   getAttribute("messages");	
   if (messages == null) {	
      Locale locale=request.getLocale();	
      messages = ResourceBundle.getBundle("WebMessages",	
         locale); 	
      session.setAttribute("messages", messages);	
   }
 

In the Web client, each JSP page first retrieves the resource bundle from the session:

<% ResourceBundle messages = 	
   (ResourceBundle)session.getAttribute("messages"); %>
 

and then looks up any string that it needs in the bundle. For example, here is how accountHist.jsp generates the headings for the transactions table:

<td><b><%=messages.getString("TxDate")%></b></td>	
<td><b><%=messages.getString("TxDescription")%></b></td>	
<td><b><%=messages.getString("TxAmount")%></b></td>	
<td><b><%=messages.getString("TxRunningBalance")%></b></td>
 

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