使用java.nio在内存中写入文件？ [英] write file in memory with java.nio?

问题描述

使用nio可以将现有文件映射到内存中。但是有可能只在内存中创建它而没有硬盘上的文件吗？

With nio it is possible to map an existing file in memory. But is it possible to create it only in memory without file on the hard drive ?

我想模仿CreateFileMapping窗口函数，它允许你在内存中写入。

I want to mimic the CreateFileMapping windows functions which allow you to write in memory.

Java中是否有一个等效的系统？

Is there an equivalent system in Java ?

目标是在内存中写入另一个程序（c ）阅读它。

The goal is to write in memory in order for another program ( c ) to read it.

推荐答案

看看以下内容。创建了一个文件，但这可能与您要获得的文件一样接近。

Have a look at the following. A file is created but this might be as close as your going to get.

MappedByteBuffer
MappedByteBuffer.load()
FileChannel
FileChannel.map()

这是一个尝试的片段让你开始吧

Here is a snippet to try and get you started.

    filePipe = new File(tempDirectory, namedPipe.getName() + ".pipe");
    try {
        int pipeSize = 4096;
        randomAccessFile = new RandomAccessFile(filePipe, "rw");
        fileChannel = randomAccessFile.getChannel();
        mappedByteBuffer = fileChannel.map(FileChannel.MapMode.READ_WRITE, 0, pipeSize);
        mappedByteBuffer.load();
    } catch (Exception e) {
    ...

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