Spring's two attribute injection methods setter injection and constructor injection or automatic injection

1. The attribute is automatically injected here, and the annotation configuration bean is different. The automatic injection here refers to the automatic injection of the bean attribute.

Bean attributes are automatically injected, including ByName and Bytype.

2. All ApplicationContext implements the Resourceloader interface, which allows the resource instance to be accessed through Resourceloader, allowing access to the resource file.

Therefore, to get the resource instance in the class, the Applicationcontextaware interface must be implemented.

Spring's two attribute injection methods setter injection and constructor injection or automatic injection