实现服务端接收多个客户端的消息_(重点)

如何实现服务端接收多个客户端的消息

1.主线程定义了循环负责接收客户端Socket管道连接

2.每接收到一个Socket通信管道后分配一个独立的线程负责处理它。

 

 

客户端

public class ClientDemo1 {
    public static void main(String[] args) {
        try {
            //1. 创建Socket通信管道请求有服务端的链接
            //public Socket(String host, int port)
            //参数一:服务端的IP地址
            //参数二:服务端的端口
            Socket socket = new Socket("127.0.0.1",9999);

            //2.从socket通信管道中得到一个字节输出流, 负责发送数据
            OutputStream os = socket.getOutputStream();

            //3.把低级的字节流包装成打印流
            PrintStream printStream = new PrintStream(os);

            Scanner sc = new Scanner(System.in);
            //4.发送消息
            while(true){
                System.out.println("请说:");
                String rs = sc.nextLine();
                printStream.println(rs);
                printStream.flush();
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
===
服务端

public class ServerDemo2 {
    public static void main(String[] args) {
        try {
            //1.注册端口
            ServerSocket serverSocket = new ServerSocket(9999);

            //a.定义一个死循环由主线程负责,不断地接受客户端的Socket管道的连接
            while (true) {
                //每接收到一个客户端的Socket管道, 交给一个独立的子线程负责读取消息
                Socket socket = serverSocket.accept();
                System.out.println(socket.getRemoteSocketAddress()+"上线了");
                new ServerReader(socket).start();

            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
===
线程

class ServerReader extends Thread{
    private Socket sk;

    public ServerReader(Socket sk) {
        this.sk = sk;
    }

    @Override
    public void run() {

        try {
            InputStream is = sk.getInputStream();
            //4.把字节输入流包装成缓冲字符输入流进行消息的接收
            InputStreamReader inputStreamReader = new InputStreamReader(is);//转换流(将字节输入流转换成字符输入流)
            BufferedReader br = new BufferedReader(inputStreamReader);
            //按行读取消息
            String rs;
            while ((rs = br.readLine()) != null){
                System.out.println(sk.getRemoteSocketAddress()+"说了"+rs);
            }
        } catch (IOException e) {
            System.out.println(sk.getRemoteSocketAddress()+"下线了");
        }
    }
}