title: Is there a way to get the names of all configuration properties in Spring boot?
body: <p>I am really new to Spring. I use the external configuration feature provided by spring boot. It works well and I used it in several configuration classes, often only with default values. Now I want to get an overview over the configuration properties I used. 
  That means I need to know all properties set with <code>@Value(...)</code> or or with <code>@ConfigurationProperties(prefix = ...)</code>. Is there a way to get this information from Spring? I can do this with reflections but I think this is not the best way.</p>