servlet和JSP过滤器Filter

作者: 来源:网络文章时间:2005-12-15 0:10:56

servlet和JSP过滤器Filter(32) import Java.util.*;
import Java.text.*;

/** Filter that keeps track of Accesses that occur
* at unusual hours.
*/
public class LateAccessFilter implements Filter {
  private FilterConfig config;
  private ServletContext context;
  private int startTime, endTime;
  private DateFormat formatter;
  public void doFilter(ServletRequest request,
                       ServletResponse response,
                       FilterChain chain)
        throws ServletException, IOException {
    HttpServletRequest req = (HttpServletRequest)request;
    GregorianCalendar calendar = new GregorianCalendar();
    int currentTime = calendar.get(calendar.HOUR_OF_DAY);
    if (isUnusualTime(currentTime, startTime, endTime)) {
      context.log("WARNING: " +
      req.getRemoteHost() +
      " Accessed " +

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