📄 simplei18nservlet.java
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// Output stream for the response PrintWriter out = res.getWriter(); out.println("<html>"); out.println("<head><title>Including another servlet from a servlet</title></head>"); out.println("<body>"); out.println("<br>The name from forwarding servlet : " + name ); RequestDispatcher dispatcher; dispatcher = getServletContext().getRequestDispatcher("/ForwardedServlet"); dispatcher.forward(req, res); } catch (Exception e) { e.printStackTrace(); } } /** Send error messages using response's sendError method. The sendError method sends multi byte error messages correctly * based on the content type set to appropriate encoding. * @param req servlet request * @param res servlet response */ protected void sendErrorMessage (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { try { String name = req.getParameter("name"); String charsetval = req.getParameter("charsetval"); res.setContentType("text/html; charset=" + charsetval); res.sendError(404, "I18n error message from servlet "+ name); } catch (Exception e) { e.printStackTrace(); } } /** Load resource bundle based on client's locale. If there is no resource bundle available, the default resource bundle * will be picked up * @param req servlet request * @param res servlet response */ protected void useResourceBundle (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { try { String name = req.getParameter("name"); String charsetval = req.getParameter("charsetval"); res.setContentType("text/html; charset=" + charsetval); ResourceBundle rb = null; rb = ResourceBundle.getBundle("LocalStrings",req.getLocale()); String msg; PrintWriter out = res.getWriter(); out.println("<html>"); out.println("<head>"); try { msg = rb.getString ("title"); out.println("<title>" + msg + "</title>"); out.println("</head>"); out.println("<body>"); out.println("<br><H1> Hello " + name + ", the following messages are displayed from a resource bundle</H1>"); msg = rb.getString ("msg"); out.println("<br><br><H2>" + msg + "</H2>"); msg = rb.getString ("thanks"); out.println("<br><br><H3>" + msg + "</H3>"); } catch (MissingResourceException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } out.println("<br>"); out.println("<P><BR><A HREF=\"/i18n-simple\">Back to sample home</A></P>"); out.println("</body></html>"); out.close(); } catch (Exception e) { e.printStackTrace(); } } /** Forwards request from servlet to jsp using RequestDispatcher's forward method. Here the data display behaviour * changes based on the content type set. If the forwarded jsp sets the content type to a different value then the new content type * should be set for the output stream * @param req servlet request * @param res servlet response */ protected void forwardJsp (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { try { RequestDispatcher dispatcher; dispatcher = getServletContext().getRequestDispatcher("/ForwardedJsp.jsp"); dispatcher.forward(req, res); } catch (Exception e) { e.printStackTrace(); } } /** It uses a new API introduced in servlet 2.4 to set character set encoding * of a response object. * @param req servlet request * @param res servlet response */ protected void expSetResCharset (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { try { /* get locale name and encoding name which is returned in * "locale:charset" format. * locale name is used for selecting a resource bundle as well as response locale. * encoding name is used for setting the response chraset. */ String loc_enc = req.getParameter("loc_enc_name"); String default_loc_enc = "en:ISO_8859-1"; if (loc_enc == null) { System.out.println("No locale encoding informaiton was received."); System.out.println("Using the default: "+default_loc_enc); loc_enc = default_loc_enc; } String[] input_array = loc_enc.split(":"); int index = input_array[0].indexOf('_'); Locale loc = null; if (index < 0){ loc = new Locale(input_array[0]); } else { String[] lang_country = input_array[0].split("_"); loc = new Locale(lang_country[0], lang_country[1]); } /* * Set response charset and response locale - new in Servlet2.4 */ res.setCharacterEncoding(input_array[1]); res.setLocale(loc); /* * Use resource bundle to get localized string */ String res_base="resources.ResourceString"; ResourceBundle rb = ResourceBundle.getBundle(res_base,loc); String page_msg = rb.getString("pageLang"); /* * Use MessageFormatter to insert a dynamic variable to the 2nd string * obtained through the resource bundle. */ MessageFormat mf = new MessageFormat(""); mf.setLocale(loc); mf.applyPattern(rb.getString("pageEnc")); Object[] msg_arg = { res.getCharacterEncoding()}; String enc_msg = mf.format(msg_arg); res.setContentType("text/html"); PrintWriter out = res.getWriter(); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet i18n samples</title></head>"); out.println("<body>"); out.println("<P><FONT FACE=\"Times New Roman\"><FONT SIZE=6><B>Servlet i18n samples</B></FONT></FONT></P>"); out.println("<p><FONT FACE=\"Times New Roman\"><b>Explicitly set character encoding for the response object</b></p>"); out.println("<p>"+page_msg+"<br>"+enc_msg+"</p>"); out.println("<P><BR><FONT FACE=\"Times New Roman\"><A HREF=\"/i18n-simple\">Back to sample home</A></P>"); out.println("<p><font size=1><font face=\"verdana,arial,helvetica,sans-serif\">Copyright(c) 2004 Sun Microsystems, Inc. All rights reserved.</font></p>"); out.close(); } catch (Exception e) { e.printStackTrace(); } } /** It uses a new API introduced in servlet 2.4 to set character set encoding * of a response object in implicity manner. * @param req servlet request * @param res servlet response */ protected void impSetResCharset (HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { try { /* get locale name and encoding name which is returned in * "locale.charset" format. * locale name is used for selecting a right resource bundle. * encoding name is used for setting the response chraset. */ String loc_name = req.getParameter("loc_name"); String default_loc = "en"; if (loc_name == null) { System.out.println("No locale encoding informaiton was received."); System.out.println("Using the default: "+default_loc); loc_name = default_loc; } int index = loc_name.indexOf('_'); Locale loc = null; if (index < 0){ loc = new Locale(loc_name); } else { String[] lang_country = loc_name.split("_"); loc = new Locale(lang_country[0], lang_country[1]); } /* * Set response charset and response locale - new in Servlet2.4 */ res.setLocale(loc); /* * Use resource bundle to get localized string */ String res_base="resources.ResourceString"; ResourceBundle rb = ResourceBundle.getBundle(res_base,loc); String page_msg = rb.getString("pageLang"); /* * Use MessageFormatter to insert a dynamic variable to the 2nd string * obtained through the resource bundle. */ MessageFormat mf = new MessageFormat(""); mf.setLocale(loc); mf.applyPattern(rb.getString("pageEnc")); Object[] msg_arg = { res.getCharacterEncoding()}; String enc_msg = mf.format(msg_arg); res.setContentType("text/html"); PrintWriter out = res.getWriter(); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet i18n samples</title></head>"); out.println("<body>"); out.println("<P><FONT FACE=\"Times New Roman\"><FONT SIZE=6><B>Servlet i18n samples</B></FONT></FONT></P>"); out.println("<p><FONT FACE=\"Times New Roman\"><b>Implicitly set character encoding for the response object</b></p>"); out.println("<p>"+page_msg+"<br>"+enc_msg+"</p>"); out.println("<P><BR><FONT FACE=\"Times New Roman\"><A HREF=\"/i18n-simple\">Back to sample home</A></P>"); out.println("<p><font size=1><font face=\"verdana,arial,helvetica,sans-serif\">Copyright(c) 2004 Sun Microsystems, Inc. All rights reserved.</font></p>"); out.close(); } catch (Exception e) { e.printStackTrace(); } } /** Handles the HTTP <code>GET</code> method. * @param request servlet request * @param response servlet response */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException { processRequest(request, response); } /** Handles the HTTP <code>POST</code> method. * @param request servlet request * @param response servlet response */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException { processRequest(request, response); } /** Simple servlet to demonstrate i18n capabilities of Application Server */ public String getServletInfo() { return "This is a simple servlet to demonstrate i18n capabilities of Application Server"; }}⌨️ 快捷键说明
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