1、将File、fileInputStream 转换为byte数组:File file = new File(“file.txt”);InputStream input = new FileInputStream(file);byte[] byt = new byte[input.available()];input.read(byt);
2、将byte数组转换为InputStream:byte[] byt = new byte[1024];InputStream input = new ByteArrayInputStream(byt);
3、将byte数组转换为File:File file = new File(”);OutputStream output = new FileOutputStream(file);BufferedOutputStream bufferedOutput = new BufferedOutputStream(output);bufferedOutput.write(byt);