简版的TCP协议聊天

客户端

```

package com.tcp2;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.InetAddress;
import java.net.Socket;

/**

1.客户端
*/
public class 客户端 {
public static void main(String[] args) {
//客户端对象
try(Socket client=new Socket(InetAddress.getByName("localhost"), 9000);
//用户输入
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
//向服务器端发送信息，输出流
BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
//读取从服务器写入的内容 输入流
BufferedReader bre=new BufferedReader(new InputStreamReader(client.getInputStream()));
){
System.out.println("客户端要发送到服务器端的内容为：");
//通过用户输入信息
String msg = br.readLine();
//将用户输入的信息发送到服务器端
bw.write(msg);
//换行的标识
bw.newLine();
//刷新缓冲区
bw.flush();
//等待接收
String msgServer = bre.readLine();
System.out.println("从服务器获取的信息："+msgServer);
}catch (Exception e) {
e.printStackTrace();
}
}
}

```

服务器端：

```

package com.tcp2;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;

/**

1.服务器端
*/
public class 服务器端 {
public static void main(String[] args) {
//服务器
try(ServerSocket ss=new ServerSocket(9000);){
System.out.println("等待客户端的连接。。。。。");
//连接每一个客户端
try(Socket client=ss.accept();
//读取客户端发送的信息
BufferedReader br=new BufferedReader(new InputStreamReader(client.getInputStream()));
//获取服务器端用户输入的信息
BufferedReader bin=new BufferedReader(new InputStreamReader(System.in));
// 向客户端写入信息
BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
){
//读取客户端发来的信息
String clientMsg = br.readLine();
System.out.println("从客户端发来的消息为："+clientMsg);
System.out.println("服务器端要发送到客户端的内容为：");
//服务器端用户输入信息
String input = bin.readLine();
//向客户端写入
bw.write(input);
bw.newLine();
bw.flush();
}catch (Exception e) {
e.printStackTrace();
}
}catch (Exception e) {
e.printStackTrace();
}
}
}

```