如何在JAR之外加载文件，但相对于JAR？ [英] How to Load File Outside of, but Relative to, the JAR?

问题描述

我需要在JAR之外加载一个文件，但相对于它（确切地说是 lib / config / config.ini ）。我使用了那个确切的路径，只要工作目录是JAR所在的地方就可以正常工作，即

I need to load a file outside of the JAR, but relative to it (lib/config/config.ini to be exact). I used that exact path, and it works fine as long as the working directory is where the JAR is, i.e.

/path/to/jar$ java -jar JAR.jar

如果它像这样运行：

~$ java -jar /path/to/jar/JAR.jar

找不到它。如何正确加载相对于JAR位置的文件？

It can't find it. How can I correctly load a file relative to the location of the JAR?

推荐答案

尝试使用 getClassLoader（ ）.getResource（classname）在jar文件中查找类的URL。你会发现它在jar路径和jar中的路径之间用！分隔，你可以轻松切片。

Try using getClassLoader().getResource("classname") to find the URL of a class in your jar file. You'll find it's delimited with a ! between the path to the jar, and the path within a jar, which you can easily slice.

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