Java JAR 找不到文件 [英] Java JAR can't find file
问题描述
我正在 eclipse 中运行一个程序,该程序引用了程序源文件夹中的一个文件.但是,当我将程序导出到可运行的 JAR 中时,该程序似乎找不到该文件.从本质上讲,该程序在 eclipse 中运行良好,但当它是独立程序时就不行了.
I am running a program in eclipse that references a file in the program's source folder. However, when I export the program into a runnable JAR, the program cannot seem to find the file. Essentially, the program works perfect in eclipse but doesn't do so when it's a standalone program.
我附上了一张我如何在程序中引用文件的照片.
I've attached a photo of how I reference the file in the program.
推荐答案
一旦它在 jar 中,您就无法使用 new File()
找到它——它现在是一个类路径资源.您需要使用 this.getClass().getResourceAsStream("/TestFileFolder/TRANSFER.xls");
(或者,如果您的方法是静态的,则需要使用 className.class
代替 getClass()
).
Once it's in the jar, you can't find it using new File()
-- it's now a class path resource. You need to use this.getClass().getResourceAsStream("/TestFileFolder/TRANSFER.xls");
(or, if your method is static, you need to use the className.class
in place of getClass()
).
这实际上是一个功能——如果出于任何原因您需要更改 TRANSFER.xls
资源,您可以通过在类路径中隐藏它来实现,而无需重新打包 jar.
this is actually a feature -- if for any reason you need to change the TRANSFER.xls
resource, you can do so by shadowing it in the classpath without repacking the jar.
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