udpserver.java

uml ooad 有ppt文件 和源码哦！跟大家分享

package server;
import java.net.*;
import java.util.*;
public class UDPServer implements Server{
	Map<String,User> users;
	DatagramSocket ds;
	ServerAction action;
	public UDPServer(){
		try {
			users=new HashMap<String,User>();
			ds=new DatagramSocket(9000);
			action=new UDPServerAction(ds);
		} catch (SocketException e) {}
	}
	public void service() throws Exception{
		act();		
	}
	public void sendAll(String text){
		Collection<User> vs=users.values();
		for(User u:vs) action.send(text, u);
	}
	public void act() {
		try {
			while (true) {
				String t = action.receive();
				String[] ss = t.split(":");
				if (ss[0].equals("0")){
					User u=users.get(ss[2]);
					action.send(t, u);
				}
				if (ss[0].equals("1")){
					User user=StaticData.currentUser;
					user.setName(ss[1]);
					Set<String> others=users.keySet();
					for(String o:others){
						action.send("1:"+o, user);
					}
					users.put(ss[1], user);
					this.sendAll(t);
				}
				if (ss[0].equals("2")){
					users.remove(ss[1]);
					this.sendAll(t);
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}