CODEWITHSUNDEEP
javajar
ilija
ilija

Reputation: 563

Search and extract a file from jar. Java

I get jar files from net. I've been able to open it and to search for a file(.txt file) that I need inside it. For doing that I am using JarEntry and method getNextJarEntry(). Finally when I identify the file I need I would like to save it in some directory on my disc. I don't know how to do this. The object I have after file identification is JarEntry which corresponds to the file I want to save. Can anybody suggest me a way how to store the file I need?

My bad, I only have JarInputStream and not the jar itself.

Upvotes: 0

Views: 538

Answers (3)

david a.
david a.

Reputation: 5291

You might load the JAR using a custom classloader (java.net.URLClassloader), then get the resource using getResourceAsStream.

Upvotes: 1

JB Nizet
JB Nizet

Reputation: 691685

Use the JarFile.getInputStream(ZipEntry) method, read all the bytes from the input stream, and write them to a FileOutputStream.

Upvotes: 2

Guillaume Polet
Guillaume Polet

Reputation: 47608

On the original JarFile object, you can pass the JarEntry and get an InputStream:

 InputStream    getInputStream(ZipEntry ze)

Upvotes: 2

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