要求使用javax.servlet.filter实现统计某个用户访问了多少次tomcat服务器的功能

发布网友发布时间：2022-05-02 17:04

共2个回答

热心网友时间：2023-10-09 00:59

// Import required java libraries
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;

public class SiteHitCounter implements Filter{

  private int hitCount;

  public void  init(FilterConfig config)
                    throws ServletException{
     // Reset hit counter.
     hitCount = 0;
  }

  public void  doFilter(ServletRequest request,
              ServletResponse response,
              FilterChain chain)
              throws java.io.IOException, ServletException {

      // increase counter by one
      hitCount++;

      // Print the counter.
      System.out.println("Site visits count :"+ hitCount );

      // Pass request back down the filter chain
      chain.doFilter(request,response);
  }
  public void destroy()
  {
      // This is optional step but if you like you
      // can write hitCount value in your database.
  }
}

　　....
<filter>
   <filter-name>SiteHitCounter</filter-name>
   <filter-class>SiteHitCounter</filter-class>
</filter>
<filter-mapping>
   <filter-name>SiteHitCounter</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>
....

热心网友时间：2023-10-09 00:59

每来一个用户+1