如何在java中提取.war文件？ ZIP与JAR [英] How to extract .war files in java? ZIP vs JAR

问题描述

我有一个网络程序，我希望用户能够导入 .war 文件，我可以从中提取某些文件.war 文件。我找到了两个类库： java.util.zip。* 和 java.util.jar。* 。据我所知，WAR文件是一个特殊的JAR文件，它是一个特殊的ZIP文件。那么使用 java.util.jar 会更好吗？如果ZIP和JAR文件几乎相同，为什么需要两个不同的库？

I have a web program where I want the user to be able to import a .war file and I can extract certain files out of the .war file. I have found two class libraries: java.util.zip.* and java.util.jar.*. From what I understand, a WAR file is a special JAR file which is a special ZIP file. So would it be better to use java.util.jar? If ZIP and JAR files are pretty much the same why is there a need for two different libraries?

推荐答案

如果你看一下 JarFile API，您会看到它是 ZipFile 类的子类。

If you look at the JarFile API you'll see that it's a subclass of the ZipFile class.

特定于jar的类主要只是添加特定于jar的功能，比如直接支持清单文件属性等等。

The jar-specific classes mostly just add jar-specific functionality, like direct support for manifest file attributes and so on.

这是OOP在行动中;由于jar文件是zip文件，因此jar类可以使用zip功能并提供额外的实用程序。

It's OOP "in action"; since jar files are zip files, the jar classes can use zip functionality and provide additional utility.

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