How to read a file from a JAR archive?

Question

I need to read the contents of /test/a.xml from the test.jar file (they are both variables, of course, not constant). What is the easiest way to do this?

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

Answer 1

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)); 

Answer 2

Use ZipInputStream and search for the desired 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 content }