classLoader.getResource在jar文件中不起作用

Question

ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
URL url = classLoader.getResource("com/x/y/z.cfg");
File file = new File(url.getPath());

This works when running jar file from Eclipse but not works when running in a jar file.

java.io.FileNotFoundException: file:\\C:\\Users\\nova\\Desktop\\Matcher.jar!\\c om\\x\\y\\z.cfg

This is not a duplicate. I've checked all other questions, no useful information.

Answer 1

When file is bundled inside the jar then it become byte stream instead of a normal File object.

Try

InputStream stram=getClass().getClassLoader().getResourceAsStream(relativePath);

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Answer 2

You can't create a File instance, because the only file you have is the JAR. That's why getResource() returns URL. You can get stream by using URL.openStream() method to read contents.