test6.java

jsp编程jsp工程项目与实践 jsp源代码

package com.proser;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class Test6 extends HttpServlet {
	
	private PrintWriter out;
	private HttpSession session;
	long	quit;
	int 	time=10;
	
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{
		request.setCharacterEncoding("GB2312");
		response.setContentType("text/html; charset=gb2312");
		out=response.getWriter();
		session=request.getSession();
		session.setMaxInactiveInterval(time);
		quit=(System.currentTimeMillis()-session.getCreationTime())/1000;
		out.print("会话已存在"+quit+"秒,过"+time+"秒后将自动退出");
		if(quit>=time){
			session.invalidate();
			response.sendRedirect("Test7");
		}
	}
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{
		doPost(request,response);
	}
}