logservlet.java

这是一个关于J2EE的开源包common里的许多组件的示例应用程序,可以借鉴.

/**
 * Title : Base Dict Class
 * Description : here Description is the function of class, here maybe multirows    
 * @author        kevin
 * @Version       1.0 
 */

package web;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.apache.log4j.NDC;

/**
 * Class description goes here.
 * @version 1.0  2005-11-7 
 * @author kevin
 */
public class LogServlet extends HttpServlet
{

	static Logger log = Logger.getLogger(LogServlet.class.getName());

	/**
	 * 
	 * @see javax.servlet.http.HttpServlet#service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	 */
	public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
	{
		//log.info("A NEW client connected.");

		String ip = request.getRemoteAddr();
		// 将IP放进 NDC中
		NDC.clear();
		NDC.push(ip);
		log.info("A NEW client connected, who's ip should appear in this log message.");
		//NDC.pop();
		NDC.remove();
		System.out.println("ip==="+ip);
	}
}