实现简单TCP传递信息

一、思路及部分代码 ：

客户端

1.获取服务器的地址，端口号

            //1.获取服务器的地址，端口号
            InetAddress serverIP = InetAddress.getByName("127.0.0.1");
            int port = 666;

2.创建一个Socket连接，参数为：地址和端口号

            //2.创建一个Socket连接    
	       Socket socket= new Socket(serverIP,port);

3.往服务器发送内容

            //3.发送消息
	       OutputStream os = socket.getOutputStream();
            os.write("hello,world!".getBytes());

4.关闭流（先开后关）

           //4.关闭流
	      if(os != null){
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(socket != null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

服务端

1.创建一个IP地址

             //1、新建一个ip地址
             ServerSocket serverSocket  = new ServerSocket(666);

2. 等待客户端连接过来

             //2.等待客户端连接过来
             Socket socket = serverSocket.accept();

3.读取客户端的信息

             //3.读取客户端的消息
             is = socket.getInputStream();

             //管道流
             baos = new ByteArrayOutputStream();
             byte[] buffer = new byte[1024];
             int len;
             while ((len = is.read(buffer))!= -1){
                 baos.write(buffer,0,len);
             }
             System.out.println(baos.toString());

4.关闭流

           //4.关闭流
	   if(baos != null){
                try {
                     baos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
             }
            if(is != null){
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
            }
            if(socket != null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
            }
            if(serverSocket != null){
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
             }

二、具体代码

客户端

package com.gitee.luee.network;

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

//客户端
public class TcpClientDemo01 {
    public static void main(String[] args) {

        Socket socket = null;
        OutputStream os = null;
        try {
            //1.获取服务器的地址，端口号
            InetAddress serverIP = InetAddress.getByName("127.0.0.1");
            int port = 666;

            //2.创建一个socket连接
             socket = new Socket(serverIP,port);
            //3.发送消息
             os = socket.getOutputStream();
            os.write("hello,world!".getBytes());
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            if(os != null){
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(socket != null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }

        }

    }

}

服务端

package com.gitee.luee.network;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

//服务器
public class TcpServerDemo01 {
    public static void main(String[] args) {

        ServerSocket serverSocket = null;
        Socket socket = null;
        InputStream is = null;
        ByteArrayOutputStream baos = null;
        
        try {
            //1、新建一个ip地址
             serverSocket = new ServerSocket(666);
            while (true){
                //2.等待客户端连接过来
                socket = serverSocket.accept();

                //3.读取客户端的消息
                is = socket.getInputStream();

                //管道流
                baos = new ByteArrayOutputStream();
                byte[] buffer = new byte[1024];
                int len;
                while ((len = is.read(buffer))!= -1){
                    baos.write(buffer,0,len);
                }
                System.out.println(baos.toString());
            }

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if(baos != null){
                try {
                    baos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(is != null){
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(socket != null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(serverSocket != null){
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

四、运行结果

至此，实现一个简单的tcp传递信息的例子就完成了。

实现简单TCP传递信息

原文：https://www.cnblogs.com/lyj-tec-blog/p/14265080.html