@Autowired

In Spring, the "@Autowired" annotation is commonly used for dependency injection, which means injecting a Spring bean into another component or class. This annotation can be applied to fields, setter methods, or constructors to indicate that Spring should automatically inject the corresponding bean.

Here's a brief overview of how "@Autowired" can be used:

Field Injection

import org.springframework.beans.factory.annotation.Autowired;

public class YourClass {

    @Autowired

    private YourBean yourBean;

}

Setter Method Injection

import org.springframework.beans.factory.annotation.Autowired;

public class YourClass {

    private YourBean yourBean;

    @Autowired

    public void setYourBean(YourBean yourBean) {

        this.yourBean = yourBean;

    }

}

Constructor Injection

import org.springframework.beans.factory.annotation.Autowired;

public class YourClass {

    private final YourBean yourBean;

    @Autowired

    public YourClass(YourBean yourBean) {

        this.yourBean = yourBean;

    }

}

By using "@Autowired", Spring will automatically inject the appropriate bean into the annotated field, setter method, or constructor during the bean creation process.

Note: In recent Spring versions, "@Autowired" is not strictly required, especially when using constructor injection. If your class has a single constructor, Spring will automatically consider it as the constructor to inject dependencies, and you can omit the "@Autowired" annotation. However, explicitly using "@Autowired" can provide additional clarity in your code.