private static String _getOperatingSystem() {
        String name = System.getProperty("os.name").toLowerCase().trim();
        if (name.startsWith("linux")) {
            return "linux";
        }
        if (name.startsWith("mac os x")) {
            return "osx";
        }
        if (name.startsWith("win")) {
            return "windows";
        }
        return name.replaceAll("\\W+", "_");
    }
@author Robert HG (254963746@qq.com) on 4/6/16.
lts-core/src/main/java/com/github/ltsopensource/core/commons/utils/PlatformUtils.java