多客户端之间的通信(模拟聊天室)

客户端的数据包通过服务器中转,发送到另一个客户端,

		public class Message implements Serializable {
			//消息包
			private String from;//发送者
			private String to;//接收者
			private int type;//消息类型
			private String info;//消息

			public Message() {
			}

			public Message(String from, String to, int type, String info) {
				this.from = from;
				this.to = to;
				this.type = type;
				this.info = info;
			}

			public String getFrom() {
				return from;
			}

			public void setFrom(String from) {
				this.from = from;
			}

			public String getTo() {
				return to;
			}

			public void setTo(String to) {
				this.to = to;
			}

			public int getType() {
				return type;
			}

			public void setType(int type) {
				this.type = type;
			}

			public String getInfo() {
				return info;
			}

			public void setInfo(String info) {
				this.info = info;
			}

			@Override
			public String toString() {
				return "Message{" +
						"from='" + from + '\'' +
						", to='" + to + '\'' +
						", type=" + type +
						", info='" + info + '\'' +
						'}';
			}
		}

		public final class MessageType {
			public static final int TYPE_LOGIN = 0x1;//登陆消息类型
			public static final int TYPE_SEND = 0x2;//发送消息类型
		}
		
		public class Server {
			//服务器端
			public static void main(String[] args) {
				//用来保存客户端处理的线程
				Vector<UserThread> vector = new Vector<>();
				ExecutorService es = Executors.newFixedThreadPool(5);
				//创建服务器端的Socket
				try {
					ServerSocket server = new ServerSocket(8888);
					System.out.println("服务器已启动,正在等待连接");
					while (true){
						Socket socket = server.accept();
						UserThread user = new UserThread(socket,vector);
						es.execute(user);
					}
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		//客户端处理的线程
		class UserThread implements Runnable{
			private String name;//客户端的用户名称(唯一)
			private Socket s;
			private Vector<UserThread> vector;//客户端处理线程的集合
			private ObjectInputStream ois;
			private ObjectOutputStream oos;
			private boolean flag = true;
			public UserThread(Socket s,Vector<UserThread> vector){
				this.s = s;
				this.vector = vector;
				vector.add(this);//当前线程添加到集合中
			}
			@Override
			public void run() {
				try{
					System.out.println("客户端"+s.getInetAddress().getHostAddress()+"已连接");
					ois = new ObjectInputStream(s.getInputStream());
					oos = new ObjectOutputStream(s.getOutputStream());
					while (flag){
						//读取消息对象
						Message msg = (Message) ois.readObject();
						int type = msg.getType();
						switch (type){
							case MessageType.TYPE_SEND:
								String to = msg.getTo();
								UserThread ut;
								int size = vector.size();
								for (int i = 0; i < size; i++) {
									ut = vector.get(i);
									if (to.equals(ut.name) && ut != this){
										ut.oos.writeObject(msg);
										break;
									}
								}
								break;
							case MessageType.TYPE_LOGIN:
								name = msg.getFrom();
								msg.setInfo("欢迎你:");
								oos.writeObject(msg);
								break;
						}
					}
					oos.close();
					ois.close();
				}catch (IOException | ClassNotFoundException e){
					e.printStackTrace();
				}
			}
		}
		
		public class Client {
			public static void main(String[] args) {
				ExecutorService es = Executors.newSingleThreadExecutor();
				Scanner input = new Scanner(System.in);
				try {
					Socket socket = new Socket("localhost",8888);
					System.out.println("服务器连接成功");
					ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());
					ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
					//向服务器发送登陆信息
					System.out.println("请输入名称:");
					String name = input.nextLine();
					Message msg = new Message(name,null,MessageType.TYPE_LOGIN,null);
					oos.writeObject(msg);
					msg = (Message) ois.readObject();
					System.out.println(msg.getInfo()+msg.getFrom());
					//启动读取消息的线程
					es.execute(new ReadInfoThread(ois));
					//使用主线程来实现发送消息
					boolean flag = true;
					while (flag){
						msg = new Message();
						System.out.println("To:");
						msg.setTo(input.nextLine());
						msg.setFrom(name);
						msg.setType(MessageType.TYPE_SEND);
						System.out.println("Info:");
						msg.setInfo(input.nextLine());
						oos.writeObject(msg);
					}
				} catch (IOException | ClassNotFoundException e) {
					e.printStackTrace();
				}
			}
		}
		//读取消息
		class ReadInfoThread implements Runnable{
			private ObjectInputStream in;
			private boolean flag = true;
			public ReadInfoThread(ObjectInputStream in){
				this.in = in;
			}
			public void setFlag(boolean flag) {
				this.flag = flag;
			}

			@Override
			public void run() {
				try{
					while (flag){
						Message message = (Message) in.readObject();
						System.out.println("["+message.getFrom()+"]对我说:"+message.getInfo());
					}
					if (in != null){
						in.close();
					}
				}catch (IOException | ClassNotFoundException e){
					e.printStackTrace();
				}
			}
		}