Java tutorial
import java.util.*; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.security.*; public class MyServlet implements Filter { public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { System.out.println("In filter"); chain.doFilter(request, response); System.out.println("Leaving filter"); } public void destroy() { } public void init(FilterConfig filterConfig) { } }