客户端
```
1 package com.tcp2; 2 3 import java.io.BufferedReader; 4 import java.io.BufferedWriter; 5 import java.io.InputStreamReader; 6 import java.io.OutputStream; 7 import java.io.OutputStreamWriter; 8 import java.net.InetAddress; 9 import java.net.Socket; 10 11 /** 12 13 1.客户端 14 */ 15 public class 客户端 { 16 public static void main(String[] args) { 17 //客户端对象 18 try(Socket client=new Socket(InetAddress.getByName("localhost"), 9000); 19 //用户输入 20 BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); 21 //向服务器端发送信息,输出流 22 BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(client.getOutputStream())); 23 //读取从服务器写入的内容 输入流 24 BufferedReader bre=new BufferedReader(new InputStreamReader(client.getInputStream())); 25 ){ 26 System.out.println("客户端要发送到服务器端的内容为:"); 27 //通过用户输入信息 28 String msg = br.readLine(); 29 //将用户输入的信息发送到服务器端 30 bw.write(msg); 31 //换行的标识 32 bw.newLine(); 33 //刷新缓冲区 34 bw.flush(); 35 //等待接收 36 String msgServer = bre.readLine(); 37 System.out.println("从服务器获取的信息:"+msgServer); 38 }catch (Exception e) { 39 e.printStackTrace(); 40 } 41 } 42 } 43 44 ```
服务器端:
```
1 package com.tcp2; 2 3 import java.io.BufferedReader; 4 import java.io.BufferedWriter; 5 import java.io.InputStreamReader; 6 import java.io.OutputStreamWriter; 7 import java.net.ServerSocket; 8 import java.net.Socket; 9 10 /** 11 12 1.服务器端 13 */ 14 public class 服务器端 { 15 public static void main(String[] args) { 16 //服务器 17 try(ServerSocket ss=new ServerSocket(9000);){ 18 System.out.println("等待客户端的连接。。。。。"); 19 //连接每一个客户端 20 try(Socket client=ss.accept(); 21 //读取客户端发送的信息 22 BufferedReader br=new BufferedReader(new InputStreamReader(client.getInputStream())); 23 //获取服务器端用户输入的信息 24 BufferedReader bin=new BufferedReader(new InputStreamReader(System.in)); 25 // 向客户端写入信息 26 BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(client.getOutputStream())); 27 ){ 28 //读取客户端发来的信息 29 String clientMsg = br.readLine(); 30 System.out.println("从客户端发来的消息为:"+clientMsg); 31 System.out.println("服务器端要发送到客户端的内容为:"); 32 //服务器端用户输入信息 33 String input = bin.readLine(); 34 //向客户端写入 35 bw.write(input); 36 bw.newLine(); 37 bw.flush(); 38 }catch (Exception e) { 39 e.printStackTrace(); 40 } 41 }catch (Exception e) { 42 e.printStackTrace(); 43 } 44 } 45 } 46 47 ```