import java.io.*;
import javax.servlet.*;

public class MyFilter implements Filter{
    public void init(FilterConfig arg0) throws ServletException {}

    public void doFilter(ServletRequest req, ServletResponse res,
            FilterChain chain) throws IOException, ServletException {
    
        PrintWriter out=res.getWriter();
        
        out.print("
this site is underconstruction..");
        out.close();
        
    }
    public void destroy() {}
}

import java.io.*;
import javax.servlet.*;

public class MyFilter implements Filter{
    static int count=0;
    public void init(FilterConfig arg0) throws ServletException {}

    public void doFilter(ServletRequest req, ServletResponse res,
            FilterChain chain) throws IOException, ServletException {
    
        PrintWriter out=res.getWriter();
        chain.doFilter(request,response);
        
        out.print("
Total visitors "+(++count));
        out.close();
        
    }
    public void destroy() {}
}

import java.io.*;
import javax.servlet.*;

public class MyFilter implements Filter{
    static int count=0;
    public void init(FilterConfig arg0) throws ServletException {}

    public void doFilter(ServletRequest req, ServletResponse res,
            FilterChain chain) throws IOException, ServletException {
    
        PrintWriter out=res.getWriter();
        long before=System.currentTimeMillis();

        chain.doFilter(request,response);
        
        long after=System.currentTimeMillis();
        out.print("
Total response time "+(after-before)+" miliseconds");
        out.close();
        
    }
    public void destroy() {}
}