META-INF的目的是什么？ [英] What's the purpose of META-INF?

问题描述

在Java中，您经常会看到包含一些元文件的META-INF文件夹。这个文件夹的目的是什么，我可以放在那里？

In Java, you often see a META-INF folder containing some meta files. What is the purpose of this folder and what can I put there?

推荐答案

一般来说，你不应该把任何东西放到META- INF自己。相反，你应该依靠你用来打包你的JAR的任何东西。这是我认为Ant真正擅长的领域之一：指定JAR文件清单属性。这很容易说：

Generally speaking, you should not put anything into META-INF yourself. Instead, you should rely upon whatever you use to package up your JAR. This is one of the areas where I think Ant really excels: specifying JAR file manifest attributes. It's very easy to say something like:

<jar ...>
    <manifest>
        <attribute name="Main-Class" value="MyApplication"/>
    </manifest>
</jar>

至少，我觉得这很容易......： - ）

At least, I think that's easy... :-)

重点是META-INF应被视为内部Java meta 目录。别乱吧！您希望包含在JAR中的任何文件都应放在其他子目录中或JAR本身的根目录下。

The point is that META-INF should be considered an internal Java meta directory. Don't mess with it! Any files you want to include with your JAR should be placed in some other sub-directory or at the root of the JAR itself.

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