Java -- using TCP to upload files

Blog description

graphic

step

1. [Client] input stream, read the file data from the hard disk to the program.
2. [Client] output stream, write out the file data to the server.
3. [server] input stream, read the file data to the server program.
4. [server] output stream, write out file data to server hard disk

code implementation

The server

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

/**
 * @author ServerTCP
 * @date 2020/4/25 10:51 morning
 */
public class ServerTCP {
    public static void main(String[] args) throws IOException {
        System.out.println("Service started, waiting for connection");
        //Create ServerSocket object, bind port, start waiting for connection
        ServerSocket ss = new ServerSocket(8888);
        //accept method, return socket object
        Socket server = ss.accept();
        //Get input object, read file
        BufferedInputStream bis = new BufferedInputStream(server.getInputStream());
        //Save to local
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("copy.txt"));

        //Create byte array
        byte[] b = new byte[1024 * 8];
        //Read character array
        int len;
        while ((len = bis.read(b)) != -1) {
            bos.write(b, 0, len);
        }

        //close resource
        bos.close();
        bis.close();
        server.close();
        System.out.println("Upload succeeded");
    }
}

client

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

/**
 * @author ClientTCP
 * @date 2020/4/25 10:58 morning
 */
public class ClientTCP {
    public static void main(String[] args) throws IOException {
        //Create input stream
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("in.txt"));
        //Create Socket
        Socket client = new Socket("127.0.0.1", 8888);
        //Output stream
        BufferedOutputStream bos = new BufferedOutputStream(client.getOutputStream());
        //Write data
        byte[] b = new byte[1024 * 8];
        int len;
        while ((len = bis.read(b)) != -1) {
            bos.write(b, 0, len);
            bos.flush();
        }
        System.out.println("File uploaded");

        //close resource
        bos.close();
        client.close();
        bis.close();
        System.out.println("File upload completed");
    }
}

Result

Thank