客户端:

package Dem2;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

/** 
* 
*/
public class TcpClient {
 public static void main(String[] args) throws Exception {
	//1。创建一个客户端的对象
	 InetAddress address = InetAddress.getLocalHost();
     Socket s=new Socket(address,12544);
   //3.获取输入输出流用于交互
     OutputStream outputStream = s.getOutputStream();
     InputStream inputStream =s.getInputStream();
   //4.封装为高级流，拥有更快的效率
     BufferedReader br=new BufferedReader(new InputStreamReader(inputStream));
     BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(outputStream));
     Scanner sc=new Scanner(System.in);
     System.out.println("请开始你的表演:");
     while(true) {
    	 String nextLine = sc.nextLine();
    	 bw.write(nextLine);
    	 bw.newLine();
    	 bw.flush();
    	System.out.println("服务器:");
      String readLine = br.readLine();
   	  System.out.println(readLine);
    	 
     }
     
}
}

服务端：

package Dem2;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

/**

 */
public class TcpServer {
	public static void main(String[] args) throws Exception {
		//1。创建一个服务器的对象2
          ServerSocket s=new ServerSocket(12544);
        //2.监听是否有客户端访问  
          Socket ss = s.accept();
        //3.获取输入输出流用于交互
          OutputStream outputStream = ss.getOutputStream();
          InputStream inputStream = ss.getInputStream();
        //4.封装为高级流，拥有更快的效率
          BufferedReader br=new BufferedReader(new InputStreamReader(inputStream));
          BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(outputStream));
          
        //5.服务端不能主动访问客户端，所以第一次交互只能响应，接收客户端的请求
          Scanner sc=new Scanner(System.in);
          while(true) {
        	  System.out.println("客户端:");
        	  String readLine = br.readLine();
        	  System.out.println(readLine);
        	  
        	 
        	  String nextLine = sc.nextLine();
         	   bw.write(nextLine);
         	   bw.newLine();
         	   bw.flush();
        	  
          }
	}
}