@Difference between component and @configuration

@Configuration In essence @Component, also @Configuration The marked class must meet the following requirements ：
1. Configuration class cannot be final class 、 Must be declared as static
2. Configuration annotations are usually used to pass @Bean Annotation generation Spring Container managed classes , It is usually meant to indicate that this is a configuration class , Use this class to register multiple Bean
3. Configuration classes can be declared in methods , It can't be private

Important differences

• If you use @Configuration Annotated class , And in this note proxyBeanMethods The value of the property is true, Will be for this bean Create a proxy class , This proxy class will intercept all the @Bean The method of decoration , In the method logic of interception , The required singleton object will be returned from the container .

• Use @Component Annotated class , Not for this bean Create a proxy class . Then we will directly execute the user's method , So every time a new object is returned .

If we were to @Configuration In the annotations proxyBeanMethods Property is set to false, Then whether its behavior will follow @Component The annotation is the same ？

@Configuration(proxyBeanMethods = false)
public class Config {
    

	@Bean
	public Hello hello(){
    
		return new Hello();
	}
}

Pass the result , We can conclude that ： If you will @Configuration In the annotations proxyBeanMethods Property is set to false, Then its behavior will follow @Component The annotation is the same . So the biggest difference is , One uses the singleton mode and the other does not

Reference boss ：https://juejin.cn/post/6873314485449261069