TCP传输

服务端

package TCPUDP;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;

public class TcpServerDemo01 {
    
    public static void main(String[] args) throws Exception {
    
        //1,创建一个端口
        ServerSocket serverSocket = new ServerSocket(9000);
        //2，监听客户端的连接
        Socket socket = serverSocket.accept();//阻塞式监听，会一至等客户端连接

        //3,获取输入流
        InputStream is = socket.getInputStream();

        //4，文件移动
        FileOutputStream fos = new FileOutputStream(new File("receive"));
        byte[] buffer = new byte[1024];
        int len;
        while((len=is.read(buffer))!=-1){
    
            fos.write(buffer,0,len);
        }

        //通知·客户端接收完毕
        OutputStream os = socket.getOutputStream();
        os.write("我接收完毕，你可以断开了".getBytes());
        //关闭资源
        fos.close();
        is.close();
        socket.close();
        serverSocket.close();
    }
}

客户端

有bug图片一直找不到，已经放弃，代码还可无错

package TCPUDP;

import java.io.*;
import java.net.InetAddress;
import java.net.Socket;

public class TcpClientDemo02 {
    
    public static void main(String[] args) throws IOException {
    
        //1,创建一个Socket连接
        Socket socket = new Socket(InetAddress.getByName("127.0.0.1"), 9000);

        //2,创建一个输出流
        OutputStream os=socket.getOutputStream();
        //3,文件流
        FileInputStream fis = new FileInputStream(new File("fj.jpg"));

        //4,写出文件
        byte[] buffer = new byte[1024];
        int len;
        while((len=fis.read())!=-1){
    
            os.write(buffer,0,len);
        }

        //通知服务器，我已经结束了
        socket.shutdownOutput();//我已经传输完了
        //确定服务器接收完毕，才能断开连接(字符串管道流)
        InputStream inputStream=socket.getInputStream();
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buffer2 = new byte[1024];
        int len2;
        while((len2=inputStream.read(buffer2))!=-1){
    
            baos.write(buffer2,0,len2);
        }
        //关闭资源
        baos.close();
        inputStream.close();
        fis.close();
        os.close();
        socket.close();
    }

}