这个配置文件的工具类有没有存在的必要？

[VKRUSSIA]

`public class PropertiesUtils extends Properties {

private static final long serialVersionUID = 1L;
private static final String DEFAULT_PROPERTIES;
static {
	DEFAULT_PROPERTIES = "config/application.properties";
}

@SuppressWarnings("unused")
private PropertiesUtils() {

}

public PropertiesUtils(@Nullable ClassLoader classLoader, String... configPath) {
	String file = configPath.length == 0 ? DEFAULT_PROPERTIES : configPath[0];
	Optional<InputStream> inStream = Optional.of(Optional.ofNullable(classLoader).orElseGet(() -> {
		ClassLoader[] classLoaders = new ClassLoader[] { Thread.currentThread().getContextClassLoader(),
				ClassLoader.getSystemClassLoader(), PropertiesUtils.class.getClassLoader() };
		return Arrays.stream(classLoaders).filter(cl -> cl.getResourceAsStream(file) != null).findFirst().get();
	}).getResourceAsStream(file));
	if (inStream.isPresent())
		try {
			super.load(inStream.get());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

}

}`