在 Java 中将字节 [] 写入文件 [英] Write byte[] to File in Java

问题描述

Java 中如何将字节数组转换为文件?

How to convert byte array to File in Java?

byte[] objFileBytes, File objFile

推荐答案

文件对象不包含文件的内容.它只是指向硬盘驱动器(或其他存储介质，如 SSD、USB 驱动器、网络共享)上的文件的指针.所以我认为你想要的是将它写入硬盘.

A File object doesn't contain the content of the file. It is only a pointer to the file on your hard drive (or other storage medium, like an SSD, USB drive, network share). So I think what you want is writing it to the hard drive.

您必须使用 Java API 中的某些类编写文件

You have to write the file using some classes in the Java API

BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(yourFile));
bos.write(fileBytes);
bos.flush();
bos.close();

您也可以使用 Writer 而不是 OutputStream.使用 writer 将允许您编写文本 (String, char[]).

You can also use a Writer instead of an OutputStream. Using a writer will allow you to write text (String, char[]).

BufferedWriter bw = new BufferedWriter(new FileWriter(yourFile));

既然你说你想把所有东西都保存在内存中，不想写任何东西，你可以尝试使用ByteArrayInputStream.这模拟了一个 InputStream，您可以将其传递给大多数类.

Since you said you wanted to keep everything in memory and don't want to write anything, you might try to use ByteArrayInputStream. This simulates an InputStream, which you can pass to the most of the classes.

ByteArrayInputStream bais = new ByteArrayInputStream(yourBytes);

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