byte[] 到 Java 文件 [英] byte[] to file in Java

问题描述

使用 Java:

我有一个 byte[] 代表一个文件.

I have a byte[] that represents a file.

如何将其写入文件(即C:myfile.pdf)

How do I write this to a file (ie. C:myfile.pdf)

我知道它已经通过 InputStream 完成，但我似乎无法解决.

I know it's done with InputStream, but I can't seem to work it out.

推荐答案

使用 Apache Commons IO

FileUtils.writeByteArrayToFile(new File("pathname"), myByteArray)

或者，如果你坚持为自己工作......

Or, if you insist on making work for yourself...

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
}

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