statfilter.java

访问统计系统

package stat;

import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.FilterChain;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import javax.servlet.http.HttpSession;
import java.util.StringTokenizer;

public class StatFilter
    implements Filter {
    public StatFilter() {
    }

    public void init(FilterConfig filtercfg) throws javax.servlet.
        ServletException {
    }

    public void doFilter(ServletRequest request,
                         ServletResponse response,
                         FilterChain filterchain) throws java.io.IOException,
        javax.servlet.ServletException {
        HttpServletRequest httpRequest = (HttpServletRequest) request;
        HttpSession session = httpRequest.getSession(true);
        if (session.getAttribute("isRecorded") == null) {
            //濡傛灉鏈