缓冲区一个大文件;的BufferedInputStream限制到2GB;阵列限制为2 ^ 31字节 [英] Buffer a large file; BufferedInputStream limited to 2gb; Arrays limited to 2^31 bytes

问题描述

我按顺序处理大型文件，我想保持一大块，它在内存，16GB内存可在64位系统。

I am sequentially processing a large file and I'd like to keep a large chunk of it in memory, 16gb ram available on a 64 bit system.

有一个快速和肮脏的方法是做到这一点，仅仅是包裹输入流中一个缓冲的输入流，遗憾的是，这只是给了我一个2GB的缓冲区。我想在内存中多了吧，我有什么办法？

A quick and dirty way is to do this, is simply wrap the input stream into a buffered input stream, unfortunately, this only gives me a 2gb buffer. I'd like to have more of it in memory, what alternatives do I have?

推荐答案

你有没有考虑在MappedByteBuffer的java.nio？这是在我的头上，但也许这就是你所期待的。

Have you considered the MappedByteBuffer in java.nio? It's over my head but maybe it is what you are looking for.

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