服务端代码

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

public class SocketServer {

	public static void main(String[] args) throws IOException {
		System.out.println("---------------------服务开启-----------------------");
		// 建立端口，监听新的请求
		ServerSocket ss = new ServerSocket(9856);
		Socket s = ss.accept();

		// 读取客户端输入的信息
		BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream()));

		String line = null;
		// 进行输出
		while ((line = br.readLine()) != null) {
			System.out.println("-----客户端输入的信息是-----");
			System.out.println(line);
		}
		s.close();
	}
}

客户端代码

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.net.UnknownHostException;

public class Client {

	public static void main(String[] args) throws UnknownHostException, IOException {

		// 建立连接
		Socket s = new Socket("127.0.0.1", 9856);

		// 读取键盘输入流
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		// 端口输出
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));

		String line = null;

		// 输入886结束输出
		while ((line = br.readLine()) != null) {
			if ("886".equals(line)) {
				break;
			}
			bw.write(line);
			bw.newLine();
			bw.flush();
		}
		s.close();
	}
}

测试结果