initservletcontextlistener.java

用JSP完成根据用户的身份实现登录识别的下载

package com.mypack.listener;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashMap;

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

import com.mypack.dto.UserInfo;

public class InitServletContextListener implements ServletContextListener {


	public void contextDestroyed(ServletContextEvent arg0) {
		// TODO Auto-generated method stub

	}


	public void contextInitialized(ServletContextEvent arg0) {
		ServletContext sc = arg0.getServletContext();
		String userInfoFile = sc.getInitParameter("userInfoFile");
		InputStream is = sc.getResourceAsStream(userInfoFile);
		BufferedReader br = new BufferedReader(new InputStreamReader(is));
		String line = null;
		HashMap<String, UserInfo> hmUserInfo = new HashMap<String, UserInfo>();
		try {
			while ((line = br.readLine()) != null) {
				String[] userInfo = line.split("\\|");
				hmUserInfo.put(userInfo[0], new UserInfo(userInfo[0],
						userInfo[1], userInfo[2]));
			}
			sc.setAttribute("hmUserInfo", hmUserInfo);
			System.out.println("用户数据加载完成!");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}