Java 使用 Socket 实现客户端和服务器的信息交互

服务器

public class Server{

	private ServerSocket serverSocket;

	private Socket socket;

	private BufferedReader in;

	private PrintWriter out;

	public Server() {

		try {

			//	定义连接端口

			serverSocket = new ServerSocket(10000);

			while(true) {

				//	等待客户端连接

				socket = serverSocket.accept();

				//	获取本机地址

				String RemoteIP = socket.getInetAddress().getHostAddress();

				//	获取本机端口号

				String RemotePort = ":" + socket.getLocalPort();

				System.out.println("服务器：有一个用户进来了! IP 地址为：" + RemoteIP + RemotePort);

				in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

				//	获取用户输入的内容

				String line = in.readLine();

				System.out.println("用户：" + line);

				out = new PrintWriter(socket.getOutputStream(),true);

				out.println("服务器：已经收到消息");

				//	关闭资源

				out.close();

				in.close();

				socket.close();

			}

		}catch(IOException e) {

			out.println("wrong");

		}

	}

	public static void main(String[] args) {

		new Server();

	}

}

客户端

public class Client{

	private Socket socket;

	private BufferedReader in;

	private PrintWriter out;

	public Client() {

		try {

			System.out.println("尝试连接  127.0.0.1:10000");

			// 设置本机地址和端口号

			socket = new Socket("127.0.0.1",10000);

			System.out.println("连接成功！");

			System.out.print("请输入你想说的话：");

			BufferedReader line = new BufferedReader(new InputStreamReader(System.in));

			out = new PrintWriter(socket.getOutputStream(),true);

			// 获取服务器传过来的消息

			out.println(line.readLine());

			in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

			System.out.println(in.readLine());

			//	关闭资源

			out.close();

			in.close();

			socket.close();

		} catch (IOException e) {

			// TODO Auto-generated catch block

			out.println("Wrong");

		}

	}

	public static void main(String[] args) {

		new Client();

	}

}

服务器

客户端