无法从META-INF读取文件 [英] cannot read a file from META-INF

问题描述

我有一个很大的问题，做一些非常愚蠢的事情。也就是说打开我的META-INF文件夹中的资源文件的流。我正在研究一个jar工具，并且这样做：

I have a big issue doing something really stupid. That is to say open a stream to a resource file in my META-INF folder. I am working on a jar tool and on doing this:

InputStream schemaIS = this.getClass().getClassLoader().getResourceAsStream("/META-INF/schema.xsd");

我只是得到一个空！该项目使用maven构建，xsd文件最终在META-INF文件夹中，但它仍然无法正常工作。

I simply get a null! The project is built using maven and the xsd file ends up in the META-INF folder, but it still won't work.

我不明白的是它背后的理论？ ClassLoader如何在文件系统中执行查找？如何获取文件？

What I don't understand is the theory behind it? How do the ClassLoader execute the lookup in the file system? How do I get my hands on the file?

推荐答案

尝试删除第一个斜杠：

InputStream schemaIS = this.getClass().getClassLoader().getResourceAsStream("META-INF/schema.xsd");

如果要调用 getResourceAsStream 类对象上的$ c>方法。在 ClassLoader 对象上，路径始终是绝对路径，并且不需要前导斜杠。

You need a leading slash if you are calling the getResourceAsStream method on a Class object. On a ClassLoader object, the path is always absolute, and the leading slash is not necessary.

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