How to read a file from JAR archive? [duplicate]

Question

I need to read the content of /test/a.xml from a test.jar file (they are both variables, of course, not constants). What is the simplest way to do it?

File file = new File("test.jar"); String path = "/test/a.xml"; String content = // ... how?

You can try to adapt this example: javaworld.com/javaworld/javatips/javatip49/JarResources.java — Hari Menon
– Hari Menon, Commented May 30, 2013 at 17:29

yegor256 · Accepted Answer · 2013-05-30 17:34:35Z

How about this:

JarFile file = new JarFile(new File("test.jar")); JarEntry entry = file.getJarEntry("/test/a.xml"); String content = IOUtils.toString(file.getInputStream(entry));

Jimmy T. · Accepted Answer · 2013-05-30 17:29:21Z

Use a ZipInputStream and search for your requested file.

FileInputStream fis = new FileInputStream(args[0]); ZipInputStream zis = new ZipInputStream(fis); ZipEntry ze; while ((ze = zis.getNextEntry()) != null) if(ze.getName().equals("/test/a.xml") { //use zis to read the file's content }

@mendel when you're in that if you can use fis like a regular InputStream and it will give you the content of the file

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