确定类来自哪个JAR文件 [英] Determine which JAR file a class is from

问题描述

我现在不在IDE的前面，只需查看API规范。

I am not in front of an IDE right now, just looking at the API specs.

CodeSource src = MyClass.class.getProtectionDomain().getCodeSource();
if (src != null) {
    URL jar = src.getLocation();
}

我想确定类是从哪个JAR文件。这是做到的方法吗？

I want to determine which JAR file a class is from. Is this the way to do it?

推荐答案

是的。它适用于所有类，除了由bootstrap classloader加载的类。另一种确定方法是：

Yes. It works for all classes except classes loaded by bootstrap classloader. The other way to determine is:

Class klass = String.class;
URL location = klass.getResource('/' + klass.getName().replace('.', '/') + ".class");

$ b $ p < 方法返回类文件本身的位置。例如：

As notnoop pointed out getProtectionDomain().getCodeSource().getLocation() method returns the location of the class file itself. For example:

jar:file:/jdk/jre/lib/rt.jar!/java/lang/String.class
file:/projects/classes/pkg/MyClass$1.class

$ c> klass.getResource（）方法返回jar文件或CLASSPATH的位置

The klass.getResource() method returns the location of the jar file or CLASSPATH

file:/Users/home/java/libs/ejb3-persistence-1.0.2.GA.jar
file:/projects/classes

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