设置主目录或工作目录

Question

I have a java application and have bundled it as App.jar . There are some third party tools I have used (lets call it NumberGenerator ). App.jar starts a process and calls NumberGenerator to get the output. To refer the executable, I have used relative paths new File("lib/NumberGenerator.exe") and it works all well.

Now on Mac, i have bundled the application using this and it automatically generates an application launcher. When I run by clicking at launcher, it launches the application. But it sets the home directory as ~ ie /Users/Jatin and not where the jar file was lying. Hence my application is unable to detect the lib folder (Obviously because it doesn't lie in that location)

In my Java code, how do I set the home folder as where my jar was lying?

Answer 1

I had a similar problem with linux. I don't know much about osx not AppBundler but in linux I solved it by creating this script

#!/usr/bin/env sh
java -Duser.dir=$(pwd) -jar myapp.jar

It may work if you manage to run the script by double clicking on it... see How to run a shell script in OS X by double-clicking?

Answer 2

return new File(MyClass.class.getProtectionDomain().getCodeSource().getLocation().getPath());

只需检查此线程如何获取正在运行的JAR文件的路径？

Answer 3

I see two approaches:

• In Info.plist , specify a java.library.path relative to $JAVAROOT , as described in the articles cite here .

   <key>Java</key> <dict> ... <key>Properties</key> <dict> <key>java.library.path</key> <string>$JAVAROOT/</string> </dict> ... </dict> 

• Use Java Web Start , which lets you manage native resources by OS and architecture.

Answer 4

您可以尝试以下方法：

System.setProperty("user.home", "your-dir");