首先使用datainputstream发送文件名，然后接收文件。要将字节转换为文件，请执行以下操作：-
这是一个问题本身

try (FileOutputStream fos = new FileOutputStream("pathname")) {
   fos.write(myByteArray);
   //fos.close(); There is no more need for this line since you had created the instance of "fos" inside the try. And this will automatically close the OutputStream
}