code: private static void printProviders() {
  		LogUtil.writeLog("Providers List:");
  		Provider[] providers = Security.getProviders();
  		for (int i = 0; i < providers.length; i++) {
  			LogUtil.writeLog(i + 1 + "." + providers[i].getName());
  		}
  	}
docs: 打jre中印算法提供者列表