import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

public class TestTcpServer {
	public static void main(String[] args) {
		ServerSocket ss = null;
		BufferedReader in = null;
		try {
			ss = new ServerSocket(8888);
			System.out.println("服務(wù)器啟動(dòng)");
			Socket socket = ss.accept();
			
			System.out.println("連接建立");
			System.out.println(socket.getInetAddress().getHostAddress());
			
			//服務(wù)器接收客戶端發(fā)送的數(shù)據(jù)
			in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
			
			String clientContent = in.readLine();
			
			System.out.println("接收客戶端消息： " +clientContent);

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

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class TestTcpClient {
	public static void main(String[] args) {
		Socket socket = null;
		BufferedWriter out = null;
		
		//客戶端發(fā)送數(shù)據(jù)，服務(wù)器端接收
		try {
			socket = new Socket("127.0.0.1",8888);
			System.out.println("與服務(wù)器連接了");
			Scanner sc = new Scanner(System.in);
			String content = sc.nextLine();

			out = new BufferedWriter((new OutputStreamWriter(socket.getOutputStream())));
			
			out.write(content);
			out.flush();
   sc.close();
		} catch (UnknownHostException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally{
			try {
				out.close();
			
				socket.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
}