Spring detailed usage of annotations in Java Spring Framework __java

This article focuses on the use of annotations in the Java Spring Framework, including a description of the Java bean definition, and the friends you need can refer to the

1. Using spring annotations to inject properties

1.1. How we injected attributes before using annotations
Implementation of the class:?

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Class Usermanagerimpl implements Usermanager {private Userdao Userdao;    public void Setuserdao (Userdao Userdao) {this. Userdao = Userdao; }    ... }

Configuration file:?