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### 23.6. 使用YAML代替Properties
[YAML](http://yaml.org/)是JSON的一个超集，也是一种方便的定义层次配置数据的格式。无论你何时将[SnakeYAML ](http://code.google.com/p/snakeyaml/)库放到classpath下，SpringApplication类都会自动支持YAML作为properties的替换。
**注**：如果你使用'starter POMs'，spring-boot-starter会自动提供SnakeYAML。