When I go to a directory and make a jar file in command prompt, it works correctly. But, when I am in dir1 and make a jar file from dir2, it makes the jar file in dir1 and the jar file has error : When I go to a directory and make a jar file in
阅读背景：
如何在java中更改user.dir（或命令提示符中的当前目录）？
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