java擷取程式運行路徑、擷取當前jar路徑

public class RtuMain {    public static void main(String[] args) {        System.out.println(getProjectPath());        System.out.println(getRealPath());    }    public static String getProjectPath() throws UnsupportedEncodingException {        URL url = RtuMain.class.getProtectionDomain().getCodeSource().getLocation();        String filePath = URLDecoder.decode(url.getPath(), "utf-8");        if (filePath.endsWith(".jar")) {            filePath = filePath.substring(0, filePath.lastIndexOf("/") + 1);        }        File file = new File(filePath);        filePath = file.getAbsolutePath();        return filePath;    }    public static String getRealPath() {        String realPath = RtuMain.class.getClassLoader().getResource("").getFile();        File file = new File(realPath);        realPath = file.getAbsolutePath();        try {            realPath = URLDecoder.decode(realPath, "utf-8");        } catch (Exception e) {            e.printStackTrace();        }        return realPath;    }}