Skip to content

Instantly share code, notes, and snippets.

@CarlEkerot
Created May 14, 2012 10:43
Show Gist options
  • Save CarlEkerot/2693246 to your computer and use it in GitHub Desktop.
Save CarlEkerot/2693246 to your computer and use it in GitHub Desktop.
Simple java file transfer
package client;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.Socket;
public class FileClient {
private Socket s;
public FileClient(String host, int port, String file) {
try {
s = new Socket(host, port);
sendFile(file);
} catch (Exception e) {
e.printStackTrace();
}
}
public void sendFile(String file) throws IOException {
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
FileInputStream fis = new FileInputStream(file);
byte[] buffer = new byte[4096];
while (fis.read(buffer) > 0) {
dos.write(buffer);
}
fis.close();
dos.close();
}
public static void main(String[] args) {
FileClient fc = new FileClient("localhost", 1988, "cat.jpg");
}
}
package server;
import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class FileServer extends Thread {
private ServerSocket ss;
public FileServer(int port) {
try {
ss = new ServerSocket(port);
} catch (IOException e) {
e.printStackTrace();
}
}
public void run() {
while (true) {
try {
Socket clientSock = ss.accept();
saveFile(clientSock);
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void saveFile(Socket clientSock) throws IOException {
DataInputStream dis = new DataInputStream(clientSock.getInputStream());
FileOutputStream fos = new FileOutputStream("testfile.jpg");
byte[] buffer = new byte[4096];
int filesize = 15123; // Send file size in separate msg
int read = 0;
int totalRead = 0;
int remaining = filesize;
while((read = dis.read(buffer, 0, Math.min(buffer.length, remaining))) > 0) {
totalRead += read;
remaining -= read;
System.out.println("read " + totalRead + " bytes.");
fos.write(buffer, 0, read);
}
fos.close();
dis.close();
}
public static void main(String[] args) {
FileServer fs = new FileServer(1988);
fs.start();
}
}
@ThanhSon232
Copy link

You guys need to set the size for the buffer as the same as your file, also fileSize, the best solution.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment