[Solved] Spring Boot external properties not loaded

Question

If you do new Admin (), you are creating a new instance of Admin and not a spring bean. So you don’t get any advantages which spring provides(for example Dependency Injection) And hence the value is null.

Instead you should Autowire it in your class. This way spring will inject the instance of Admin that it has created (with injected values)

@Autowired
Admin admin;

And before you ask, yes by default all beans are singleton(unless specified otherwise). So no matter whereever you Autowire Admin, you will get the same instance.

This is a broad topic, you should read about it.

Accepted Answer

If you do new Admin (), you are creating a new instance of Admin and not a spring bean. So you don’t get any advantages which spring provides(for example Dependency Injection) And hence the value is null.

Instead you should Autowire it in your class. This way spring will inject the instance of Admin that it has created (with injected values)

@Autowired
Admin admin;

And before you ask, yes by default all beans are singleton(unless specified otherwise). So no matter whereever you Autowire Admin, you will get the same instance.

This is a broad topic, you should read about it.