如何从ouside读取jar资源中的文件 [英] How to read a file inside a jar's resources from ouside the jar

问题描述

我在abc.jar的类路径中有一个文件X.json。 abc.jar中有一个readFile方法，该文件的读取方式为

I have a file X.json inside abc.jar in its classpath. There is a method readFile in abc.jar which reads the file as

URL url = Abc.class.getClassLoader().getResource("X.json");  
File file = new File(url.toURI());*

如果我从jar的上下文中运行它很好，即abc.jar内部某个文件中的main方法

which reads it fine if i run it from within the jar's context i.e main method in some file inside the abc.jar

但是当从abc.jar外部从某些调用readFile时其他代码因 java.lang.IllegalArgumentException而失败：URI不是分层的

But when readFile is called from from outside of abc.jar from some other code it fails with java.lang.IllegalArgumentException: URI is not hierarchical

如何获取File对象通过从罐子的上下文外部调用方法readFile？

How do I get the File object by calling the method readFile from outside the jar's context ?

推荐答案

在部署时，这些资源将成为 embedded-resource 。在这种情况下，必须通过 URL 而不是 File 访问资源。有关标签的信息，请参见信息页面，以了解形成 URL 。

By the time of deployment, those resources will become an embedded-resource. That being the case, the resource must be accessed by URL instead of File. See the info page for the tag, for a way to form an URL.

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