springboot @Configuration和@Componment的区别及说明

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
public @interface Configuration {
    @AliasFor(
        annotation = Component.class
    )
    String value() default "";
}

public class Car {

    private int id;

    private String name;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

public class Driver {

    private int id;

    private String name;

    private Car car;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Car getCar() {
        return car;
    }

    public void setCar(Car car) {
        this.car = car;
    }

}
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MyTestConfig {

    @Bean
    public Driver driver() {
        Driver driver = new Driver();
        driver.setId(1);
        driver.setName("driver");
        driver.setCar(car());
        return driver;
    }

    @Bean
    public Car car() {
        Car car = new Car();
        car.setId(1);
        car.setName("car");
        return car;
    }

}
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Component
public class MyTestConfig {
    @Bean
    public Driver driver() {
        Driver driver = new Driver();
        driver.setId(1);
        driver.setName("driver");
        driver.setCar(car());
        return driver;
    }
    @Bean
    public Car car() {
        Car car = new Car();
        car.setId(1);
        car.setName("car");
        return car;
    }

}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

//@Configuration
@Component
public class MyTestConfig2 {

    @Autowired
    Car car;
    
    @Bean
    public Driver driver() {
        Driver driver = new Driver();
        driver.setId(1);
        driver.setName("driver");
        driver.setCar(car);
        return driver;
    }

    @Bean
    public Car car() {
        Car car = new Car();
        car.setId(1);
        car.setName("car");
        return car;
    }

}