获取程序正在运行的.jar文件的URL [英] Get URL of file in .jar that the program is running

问题描述

给定使用maven编译的hello.jar，我想访问位于folder / file.file下的资源。但是我不知道如何获取我所在的当前JAR的URL。

Given hello.jar, which is compiled with maven, I want to access a resource located under folder/file.file. However I don't know how to get the URL of the current JAR I am in. Would

file://./folder/file.file

正常工作，或者

jar:file://./!hello.jar/folder/file.file

还是有更简单的方法吗？

or is there an easier way to do this?

（抱歉这个愚蠢的问题，我是maven的新手。）

(Sorry for the dumb question, I'm new to maven.)

推荐答案

这对我有用：

URL url = this.getClass().getProtectionDomain().getCodeSource().getLocation();
String jarPath = URLDecoder.decode(url.getFile(), "UTF-8");

jarPath 然后包含完整路径带有该代码的类所在的jar文件。

jarPath then contains the complete path to the jar file where the class with that code is located.

通过URLDecoder注意绕行，否则如果找到jar文件，你将得到一个包含％20的文件名在包含空格的目录中。

Note the "detour" through URLDecoder, otherwise you'll get a filename containing %20 if the jar files is located in a directory that contains spaces.

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