如何将文件从客户端发送到服务器到另一个客户端？

Question

what I want ask is could I do something with file? which Stream is file send by ?Should file change to another data?

Answer 1

You can read the file using an InputStream and write its data to the OutputStream of a Socket .

This may look something like this:

OutputStream out = null;
FileInputStream in = null;

try {
    // Input from file
    String pathname = "path/to/file.dat";
    File file = new File(pathname);
    in = new FileInputStream(file);

    // Output to socket
    String host = "10.0.1.8";
    int port = 6077;
    Socket socket = new Socket(host, port);
    socket.connect(endpoint); // TODO: define endpoint
    out = socket.getOutputStream();

    // Transfer
    while (in.available() > 0) {
        out.write(in.read());
    }

} catch (Exception e) {
    // TODO: handle exception

} finally {
    if (out != null)
        out.close();
    if (in != null)
        in.close();
}

PS: I'm not sure if this actually works. It's meant to get you started...