package com.imooc.total;

import java.awt.image.SampleModel;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import javax.servlet.ServletContextEvent;

import javax.servlet.ServletContextListener;

import javax.servlet.ServletRequestEvent;

import javax.servlet.ServletRequestListener;

public class RequestTotalListener implements ServletContextListener,ServletRequestListener{

@Override

public void requestDestroyed(ServletRequestEvent sre) {

// TODO Auto-generated method stub

}

@Override

public void requestInitialized(ServletRequestEvent sre) {

// TODO Auto-generated method stub

List<String>timeList = (List)sre.getServletContext().getAttribute("timeList");

List<Integer>valueList = (List)sre.getServletContext().getAttribute("valueList");

Date date = new Date();

SimpleDateFormat saf = new SimpleDateFormat("HH:mm");

String time = saf.format(date);

if(timeList.indexOf(time)==-1) {

timeList.add(time);

valueList.add(1);

sre.getServletContext().setAttribute("timeList", timeList );

sre.getServletContext().setAttribute("valueList", valueList);

}else {

int index = timeList.indexOf(time);

int value = valueList.indexOf(index);

valueList.set(value, value+1);

sre.getServletContext().setAttribute("valueList", valueList);

}

}

@Override

public void contextDestroyed(ServletContextEvent sce) {

// TODO Auto-generated method stub

}

@Override

public void contextInitialized(ServletContextEvent sce) {

// TODO Auto-generated method stub

List timeList=new ArrayList();

List valueList=new ArrayList();

sce.getServletContext().setAttribute("timeList", timeList);

sce.getServletContext().setAttribute("valueList", valueList);

}

}

package com.imooc.total;

import java.io.IOException;

import java.util.List;

import javax.servlet.ServletContext;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

 * Servlet implementation class RequestTotalServlet

 */

@WebServlet("/rt")

public class RequestTotalServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

    /**

     * @see HttpServlet#HttpServlet()

     */

    public RequestTotalServlet() {

        super();

        // TODO Auto-generated constructor stub

    }

/**

* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

*/

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

ServletContext content=request.getServletContext();

List<String>timeList = (List)content.getAttribute("timeList");

List<Integer>valueList = (List)content.getAttribute("valueList");

response.setContentType("text/html;utf-8");

response.getWriter().println(timeList.toString());

response.getWriter().println("<br/>");

response.getWriter().println(valueList.toString());

}

/**

* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

*/

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

doGet(request, response);

}

}