contextlistener.java

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package com.briup.run.web.listener;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import com.briup.run.common.util.BeanFactory;
import com.briup.run.service.IMemberService;

public class ContextListener implements ServletContextListener {

	public void contextDestroyed(ServletContextEvent arg0) {
		// TODO Auto-generated method stub
		ServletContext context=arg0.getServletContext();
		String path=context.getRealPath("/data/count.dat");  //获得应用程序的根目录
		File f=new File(path);
		try{
			FileOutputStream fos=new FileOutputStream(f);
			Integer count=(Integer)context.getAttribute("count");
			fos.write(count);
			fos.close();
			context.removeAttribute("count");
		}catch(Exception e){
			e.printStackTrace();
		}
	}

	public void contextInitialized(ServletContextEvent arg0) {
		// TODO Auto-generated method stub
		ServletContext context=arg0.getServletContext();
		String path=context.getRealPath("/data/count.dat");  //获得应用程序的根目录
		
		File f=new File(path);
		try{
			if(!f.exists())
				f.createNewFile();
			FileInputStream file=new FileInputStream(f);
			int count=file.read();
			if(count==-1)
				count=0;
			file.close();
			context.setAttribute("count", count);
		}catch(Exception e){
			e.printStackTrace();
		}
	}

}