How to find the package of a class file in java

Question

I'm writing a java program that works with .class files. I want to be able to read a .class file on the filesystem (with InputStream) and determine the package that it is in. That .class file might not be in a nice package directory structure, it could be lying around in some random place. How can I do this?

Answer 1

阅读类文件格式文档 -或使用知道如何解析类文件的库，例如BCEL及其ClassParser类。