java网络编程-tcp-server-client

服务器端

import java.net.*;
import java.io.*;

public class GreetingServer extends Thread {
    private ServerSocket serverSocket;
    public GreetingServer(int port) throws IOException {
        serverSocket = new ServerSocket(port);
        serverSocket.setSoTimeout(100000);
    }
    public void run() {
        while (true) {
            try {
                System.out.println("等待远程连接，端口号为：" + serverSocket.getLocalPort() + "...");
                Socket server = serverSocket.accept();
                System.out.println("远程主机地址：" + server.getRemoteSocketAddress());
                // 获取客户端发送过来的数据
                DataInputStream in = new DataInputStream(server.getInputStream());
                System.out.println(in.readUTF());
                // 向客户端发送数据
                DataOutputStream out = new DataOutputStream(server.getOutputStream());
                out.writeUTF("谢谢链接我" + server.getLocalSocketAddress() + "\nGoodby!");
                server.close();
            } catch (SocketTimeoutException s) {
                System.out.println("Socket timed out!");
            } catch (IOException e) {
                // 打印异常堆栈信息到标准错误流
                e.printStackTrace();
                break;
            }
        }
    }
    public static void main(String[] args) {
        int port = Integer.parseInt(args[0]);
        try {
            Thread t = new GreetingServer(port);
            t.run();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

客户端

import java.net.*;
import java.io.*;

public class GreetingClient {
    public static void main(String[] args) {
        String serverName = args[0];
        int port = Integer.parseInt(args[1]);
        try {
            System.out.println("连接到主机：" + serverName + "端口号" + port);
            Socket client = new Socket(serverName, port);
            System.out.println("远程主机地址：" + client.getRemoteSocketAddress());
            OutputStream outToServer = client.getOutputStream();
            DataOutputStream out = new DataOutputStream(outToServer);
            out.writeUTF("hello from " + client.getLocalSocketAddress());
            InputStream inFromServer = client.getInputStream();
            DataInputStream in = new DataInputStream(inFromServer);
            System.out.println("服务器响应：" + in.readUTF());
            client.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}