import Java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public final class LoggingFilter implements Filter
{
private FilterConfig filterConfig = null;
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain)
throws IOException, ServletException
{
long start = System.currentTimeMillis();
String address = request.getRemoteAddr();
String file = ((HttpServletRequest) request).getRequestURI();
chain.doFilter(request, response);
filterConfig.getServletContext().log(
"User Access! " +
" User IP: " + address +
" Resource: " + file +
" Milliseconds used: " + (System.currentTimeMillis() - start)
);
}
public void destroy() { }
public void init(FilterConfig filterConfig) {
this.filterConfig = filterConfig;
}
}
（出处：http://www.knowsky.com）
