爪哇咖啡屋 : [轉貼]Servlet、Jsp性能优化

public class ControllerServlet extends HttpServlet
{
   private javax.sql.DataSource testDS = null;

   public void init(ServletConfig config) throws ServletException
   {
      super.init(config);
      Context ctx  = null;
      try
      {
         ctx = new InitialContext();
         testDS = (javax.sql.DataSource)ctx.lookup("jdbc/testDS");
      }
      catch(NamingException ne)
      {
         ne.printStackTrace();              
       }
       catch(Exception e)
       {
          e.printStackTrace();
       }
   }

   public javax.sql.DataSource getTestDS()
      {
         return testDS;
      }
   ...
   ...
}

<%@ page session="false"%>

public void doGet(HttpServletRequest request, HttpServletResponse response)
          throws IOException, ServletException
{
          
   OutputStream out = null

   // Check the Accepting-Encoding header from the HTTP request.
   // If the header includes gzip, choose GZIP.
   // If the header includes compress, choose ZIP.
   // Otherwise choose no compression.

   String encoding = request.getHeader("Accept-Encoding");    
      
   if (encoding != null && encoding.indexOf("gzip") != -1)
   {
       response.setHeader("Content-Encoding" , "gzip");
       out = new GZIPOutputStream(response.getOutputStream());
   }
   else if (encoding != null && encoding.indexOf("compress") != -1)
   {
       response.setHeader("Content-Encoding" , "compress");
       out = new ZIPOutputStream(response.getOutputStream());
   }
   else
   {
       out = response.getOutputStream();

   }
   ...
   ...                        
}