给定Java InputStream，如何确定流中的当前偏移量？ [英] Given a Java InputStream, how can I determine the current offset in the stream?

问题描述

我喜欢类似于通用的，可重复使用的 getPosition（）方法，它会告诉我从流的起始点读取的字节数。理想情况下，我更喜欢使用它来处理所有的InputStream，所以当我从不同的来源获取它们时，我不必包装它们中的每一个。

I'd like something like a generic, re-usable getPosition() method that will tell me the number of bytes read from the starting point of the stream. Ideally, I would prefer this to work with all InputStreams, so that I don't have to wrap each and every one of them as I get them from disparate sources.

这样的野兽存在吗？如果没有，任何人都可以推荐现有的计数实现 InputStream ？

Does such a beast exist? If not, can anyone recommend an existing implementation of a counting InputStream?

推荐答案

查看 CountingInputStream 在Commons IO包中。他们也有很多其他有用的InputStream变种。

Take a look at CountingInputStream in the Commons IO package. They have a pretty good collection of other useful InputStream variants as well.

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