java网络编程测试demo

旧城等待， 2022-12-29 00:27 220阅读 0赞

import java.io.InputStream;
    import java.net.ServerSocket;
    import java.net.Socket;
    
    public class Server {
        public static final int port = 7002;//监听的端口号
    
        public static void main(String[] args) {
            System.out.println("Server...\n");
            Server server = new Server();
            server.init();
        }
    
        public void init() {
            try {
                //创建一个ServerSocket，这里可以指定连接请求的队列长度
                //new ServerSocket(port,3);意味着当队列中有3个连接请求是，如果Client再请求连接，就会被Server拒绝
                ServerSocket serverSocket = new ServerSocket(port);
                while (true) {
                    //从请求队列中取出一个连接
                    Socket client = serverSocket.accept();
                    // 处理这次连接
                    new HandlerThread(client);
                }
            } catch (Exception e) {
                System.out.println("服务器异常: " + e.getMessage());
            }
        }
    
        private class HandlerThread implements Runnable {
            private Socket socket;
            public HandlerThread(Socket client) {
                socket = client;
                new Thread(this).start();
            }
    
            public void run() {
                try {
                    // 读取客户端数据
                    InputStream inputStream = socket.getInputStream();
                    byte[] bytes = new byte[2048];
                    int i = 0;
                    if (inputStream.read(bytes)!=-1){
                        String s = new String(bytes);
                        System.out.println(s);
                    }
    //                BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
    //                String clientInputStr = input.readLine();//这里要注意和客户端输出流的写方法对应,否则会抛 EOFException
    //                // 处理客户端数据
    //                System.out.println("客户端发过来的内容:" + clientInputStr);
    //
    //                // 向客户端回复信息
    //                PrintStream out = new PrintStream(socket.getOutputStream());
    //                System.out.print("请输入:\t");
    //                // 发送键盘输入的一行
    //                String s = new BufferedReader(new InputStreamReader(System.in)).readLine();
    //                out.println(s);
    //
    //                out.close();
    //                input.close();
                } catch (Exception e) {
                    System.out.println("服务器 run 异常: " + e.getMessage());
                } finally {
                    if (socket != null) {
                        try {
                            socket.close();
                        } catch (Exception e) {
                            socket = null;
                            System.out.println("服务端 finally 异常:" + e.getMessage());
                        }
                    }
                }
            }
        }
    }