How do I create an input stream from a ZipEntry

Question

I have a class which wraps ZipEntrys, but I'm struggling to see how I could then write a method that returns an input stream from any one ZipEntry. I managed to write something that could return an array of input streams for a ZipFile, but I need a way to get an input stream from just one ZipEntry.

Answer 1

How about this?

ZipFile zipFile = new ZipFile("file.zip"); ZipEntry zipEntry = zipFile.getEntry("fileName.txt");        InputStream inputStream = zipFile.getInputStream(zipEntry); 

Answer 2

Do you not have the ZipFile instance from which the ZipEntry was sourced? If you do you could use ZipFile.getInputStream(ZipEntry).

https://docs.oracle.com/javase/8/docs/api/java/util/zip/ZipFile.html

PS. Just had a quick look at the code and a ZipEntry is not a wrapper for the underlying data in the zip file. It is just a "place holder" for the entry as far as I can see (i.e. zipped file attributes not the data). The actual stream is created through a JNI call in the ZipFile class. Meaning that I do not believe you can do what you are looking to do in a practical way.