如何从URL或字符串中删除文件名？Stringos=System.getProperty("os.name").toLowerCase();StringnativeDir=Game.class.getProtectionDomain().getCodeSource().getLocation().getFile().toString();//Removethe.jarfromthestringif(nativeDir.endsWith(".jar"))nativeDir=nativeDir.substring(0,nativeDir.lastIndexOf("/"));//Loadth