servlet和JSP过滤器Filter(23) <LI>Web content filters <LI>Kalman filters <LI>Servlet and JSP filters</UL>Check out <A HREF="TodaysSpecial">Today's Special</A>.</CENTER></BODY></HTML>程序清单9-5 TodaysSpecialServlet.Javapackage moreservlets;import Java.io.*;import Javax.servlet.*;import Javax.servlet.http.*;/** Sample servlet used to test the simple filters. */public class TodaysSpecialServlet extends HttpServlet { private String title, picture; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { updateSpecials(); response.setContentType("text/html"); PrintWriter out = response.getWriter(); String docType = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 " + "Transitional//EN\">\n"; out.println (docType +