一对多聊天服务器

服务器设计

1.服务器的连接设计

2.服务器的线程设计

创建一对多聊天服务应用

/**
 * 接收客户端消息的线程类
 */
class ChatReceive extends Thread {
    private Socket socket;
    public ChatReceive(Socket socket){
        this.socket = socket;
    }
    @Override
    public void run(){
        this.receiveMsg();
    }
    /**
     * 实现接收客户端发送的消息
     */
    private void reveiveMsg(){
        try(BufferedReader br = new BufferedReader(new InputStreamReader(this.socket.getInputStream()))
        ){
            while(true){
                String msg = br.readLine();
                synchronized("abc"){
                    //把读取到的数据写入公共数据区
                    ChatRoomServer.buf="["+this.socket.getInetAddress()+"] "+msg;
                    //唤醒发送消息的线程对象
                    "abc".notifyAll();
                }
            }
        }catch(Exception e){
            e.printStackTrace();
        }
    }
}

/**
 * 向客户端发送消息的线程类
 */
class ChatSend extends Thread {
    private Socket socket;
    public ChatSend(Socket socket){
        this.socket = socket;
    }
    @Override
    public void run(){
        this.sendMsg();
    }
    /**
     * 将公共数据区的消息发送给客户端
     */
    private void sendMsg(){
        try(PrintWriter pw = new PrintWriter(this.socket.getOutputStream())
        ){
            while(true){
                synchronized("abc"){
                    //让发送消息的线程处于等待状态
                    "abc".wait();
                    //将公共数据区中的消息发送给客户端
                    pw.println(ChatRoomServer.buf);
                    pw.flush();
                }
            }
        }catch(Exeception e){
            e.printStackTrace();
        }
    }
}

public class ChatRoomServer {
    //定义公共数据区
    public static String buf;
    public static void main(String[] args){
        System.out.println("Chat Server Version 1.0");
        System.out.println("Listen at 8888");
        try(ServerSocket serverSocket = new ServerSocket(8888)
        ){
            while(true){
                Socket socket = ServerSocket.accept();
                System.out.println("连接到："+socket.getInetAddress());
                new ChatReceive(socket).start();
                new ChatSend(socket).start();
            }
        }catch(Exception e){
            e.printStackTrace();
        }
    }
}