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 Web 程序，我希望用户能够在其中导入 .war 文件，并且我可以从 .war 文件中提取某些文件.我发现了两个类库:java.util.zip.* 和 java.util.jar.*.据我了解，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

如果看JarFile API 你会看到它是 ZipFile 类.

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

jar 特定的类大多只是添加 jar 特定的功能，例如对清单文件属性的直接支持等.

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"；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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