springboot 使用官方工具类手动读取yml文件

代码： 

    //读取文件
	private Map getResource(String classPath) {
		ClassPathResource resource = new ClassPathResource(classPath);
		InputStream inputStream;
		Yaml yaml = new Yaml();
		Map res = new linkedHashMap<>();
		try {
			inputStream = resource.getInputStream();
			BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
			Map map = yaml.load(reader);
			buildFlattenedMap(res, asMap(map), null);
		} catch (IOException e) {
			LOGGER.info("get input stream fail", e);
		}
		return res;
	}

    //转为map
	private Map asMap(Object object) {
		// YAML can have numbers as keys
		Map result = new linkedHashMap<>();
		if (!(object instanceof Map)) {
			// A document can be a text literal
			result.put("document", object);
			return result;
		}

		Map map = (Map) object;
		map.forEach((key, value) -> {
			if (value instanceof Map) {
				value = asMap(value);
			}
			if (key instanceof CharSequence) {
				result.put(key.toString(), value);
			} else {
				// It has to be a map key in this case
				result.put("[" + key.toString() + "]", value);
			}
		});
		return result;
	}

    
	private void buildFlattenedMap(Map result, Map source, @Nullable String path) {
		source.forEach((key, value) -> {
			if (org.springframework.util.StringUtils.hasText(path)) {
				if (key.startsWith("[")) {
					key = path + key;
				} else {
					key = path + '.' + key;
				}
			}
			if (value instanceof String) {
				result.put(key, value);
			} else if (value instanceof Map) {
				// Need a compound key
				@SuppressWarnings("unchecked")
				Map map = (Map) value;
				buildFlattenedMap(result, map, key);
			} else if (value instanceof Collection) {
				// Need a compound key
				@SuppressWarnings("unchecked")
				Collection