如何处理类路径冲突
在我的项目中，我同时使用 glassfish-embedded 3.1.1 和 guava lib...问题是 glassfish 附带了 guava 的旧实现（即 google-collections）...
这会导致运行时出现 NoSuchMethodError，例如，当使用稍后在 guava 中引入的 Lists.reverse() 或 Sets.newIdentityHashSet() 时。
我找不到任何解决方案来解决这个问题...（唯一的方法是手动将 glassfish jar 中的 com/google 类目录删除...）
In my project, I'm using both glassfish-embedded 3.1.1 and the guava lib... The problem is that glassfish comes with the old implementation of guava (ie google-collections)...
This results in NoSuchMethodError at runtime, for example when using Lists.reverse(), or Sets.newIdentityHashSet() which were introduced later in guava.
I don't find any solution to solve this... (the only one is to manually trash the com/google classes directory in the glassfish jar...)
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您可以通过指定以下内容来克服这个问题。阅读类加载器一章的委托部分。
检查此 SO 帖子，了解 Java EE 应用程序中的类加载情况：Java EE 类加载标准
You can overcome this be specifying the below. Read the Delegation section of the Class Loaders chapter.
Check this SO post for class loading in Java EE apps in general: Java EE class loading standard
Glassfish 永远不应该在自己的 jar 中包含 com.google 类。那是一个错误。
更新[@sly7_7]：看来 glassfish 不再在自己的罐子中包含番石榴，但它取决于番石榴工件。这应该可以解决问题。
感谢@JagWire 指出这一点。
Glassfish should never have included com.google classes in their own jar. That was an error.
UPDATE[@sly7_7]: It seems like glassfish does not include guava in their own jar anymore, but it depends on the guava artifact instead. This should resolve the problem.
Thanks to @JagWire for pointing this.
我能够通过使用以下 Glassfish v4 版本来消除错误：
http://grepcode.com/snapshot/maven.java.net/content/groups/promoted/org.glassfish.main.extras/glassfish-embedded-all/4.0.1-b01
可能值得一看。
I was able to make the error go away by using the following Glassfish v4 build:
http://grepcode.com/snapshot/maven.java.net/content/groups/promoted/org.glassfish.main.extras/glassfish-embedded-all/4.0.1-b01
Might be worth taking a look.