如何知道java中jar文件的目录？ [英] How to know the directory of jar file in java?

问题描述

我有一个可执行的jar文件，我希望它能够读取和写入与.jar文件位于同一目录的txt文件的信息。我怎样才能做到这一点？如何获取可执行jar文件目录路径。它只需要在Windows平台上工作，它就是桌面应用程序。

I have an executable jar file and I want it to be able to read and write info to a txt file that is located at the same dir as the .jar file is. How can I do that? How can I get the executable jar file dir path. It only has to work on windows platform and it's a desktop application.

推荐答案

以下代码片段将为您完成此任务：

The following code snippet will do this for you:

final File f = new File(MyClass.class.getProtectionDomain().getCodeSource().getLocation().getPath());

_{用您的<替换 MyClass code> main class}

_{replace MyClass with your main class}

生成的文件对象 f 表示已执行的 .jar 文件。
您可以使用此对象获取文件所在的目录，并使用它来构建目录路径。

The resulting File object f represents the .jar file that was executed. You can use this object to get the directory the file is in and use that to build a directory path.

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