byte[]转为FileInputStream

byte[]可以通过将其写入一个临时文件来转换为FileInputStream。下面是一个示例代码，演示了如何将byte[]转换为FileInputStream：

FileInputStream byteToFile(byte[] bytes, String fileName) {
    File file = new File(fileName);
    FileInputStream fileInputStream = null;
    try {
        OutputStream output = new FileOutputStream(file);
        BufferedOutputStream bufferedOutput = new BufferedOutputStream(output);
        bufferedOutput.write(bytes);
        fileInputStream = new FileInputStream(file);
        file.deleteOnExit();
        return fileInputStream;
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return fileInputStream;
}