loginservlet.java

简单的在线聊天系统 jsp javabean entity

package com.chatroom.servlet;

import java.io.IOException;
import java.util.Date;
import java.util.Map;

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

import com.chatroom.bean.Chat;
import com.chatroom.bean.Room;
import com.chatroom.entity.Word;

public class LoginServlet extends HttpServlet {
	public void doGet(HttpServletRequest request, HttpServletResponse response)  throws IOException , ServletException{
		this.doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException , ServletException{
		try {
			String nickname = request.getParameter("txtName");
			nickname = new String(nickname.getBytes("ISO-8859-1"),"gbk");
			if (nickname == null || ("".equals(nickname.trim()))) {
				response.sendRedirect("Login.html");
				return;
			}
			Map map = Room.getRoom().allUsers;
			if (map.containsKey(nickname)) {
				response.sendRedirect("Login.html");
				return;
			}
			Long time = (new Date()).getTime();
			map.put(nickname, time);
			String content = "<font color=red>系统消息:" + nickname
					+ "来到了聊天室</font>";
			Chat.getChat().area.add(new Word(time, content));
			request.getSession().setAttribute("nickname", nickname);
			response.sendRedirect("ChatRoom.jsp");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}