Java套接字 - 将文件从客户端发送到服务器

Question

我已经看到很多将文件从服务器发送到客户端的示例.例如(在这里找到):

服务器:

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Main {
  public static void main(String[] args) throws IOException {
    ServerSocket servsock = new ServerSocket(123456);
    File myFile = new File("s.pdf");
    while (true) {
      Socket sock = servsock.accept();
      byte[] mybytearray = new byte[(int) myFile.length()];
      BufferedInputStream bis = new BufferedInputStream(new FileInputStream(myFile));
      bis.read(mybytearray, 0, mybytearray.length);
      OutputStream os = sock.getOutputStream();
      os.write(mybytearray, 0, mybytearray.length);
      os.flush();
      sock.close();
    }
  }
}

客户:

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.Socket;

public class Main {
  public static void main(String[] argv) throws Exception {
    Socket sock = new Socket("127.0.0.1", 123456);
    byte[] mybytearray = new byte[1024];
    InputStream is = sock.getInputStream();
    FileOutputStream fos = new FileOutputStream("s.pdf");
    BufferedOutputStream bos = new BufferedOutputStream(fos);
    int bytesRead = is.read(mybytearray, 0, mybytearray.length);
    bos.write(mybytearray, 0, bytesRead);
    bos.close();
    sock.close();
  }
}

有没有办法重写这个或类似的东西,以反过来使用,以便客户端可以将文件发送到服务器？

Answer 1

是的,可以做到.对于客户端,您将在本地读取文件并写入服务器的outpustream,而不是从服务器请求文件.在服务器端,您将接受新连接,并从服务器Inpustream中读取客户端发送的内容.