#How does spring boot finds all the classes without any explicitly defined

1 messages · Page 1 of 1 (latest)

white ivy
#

I am trying to learn annotation and I am not sure how librray like Spring book scan all the classes it needs. To my understanding, spring boot have annotation like @Bean and @Component to reprent the relation with spring boot.

My question is how does it find those classes. Is there any api to loop through all classes and spring takes out the Class<?> from those list. Or how does this work.

queen creekBOT
#

<@&1004656351647117403> please have a look, thanks.

#

Here is an AI assisted attempt to answer your question 🤖. Maybe it helps! In any case, a human is on the way 👍. To continue talking to the AI, you can use </chatgpt:1108714622413963314>.

#
TJ-Bot
I am trying to learn annotation and I am not sure how librray like Spring book scan all the classes it needs. To my understanding, spring boot have annotation like @Bean and @Component to reprent the relation with spring boot. My question is how does it f

ing, Spring Boot uses component scanning to automatically find and register classes as beans. This is achieved through annotations like @ComponentScan, which instructs Spring to scan a specified package and its subpackages for classes marked with certain annotations such as @Component, @Service, @Repository, or @Controller.

When Spring Boot starts up, it looks for these annotations in the specified packages and registers the corresponding classes as beans in the application context. This allows for automatic dependency injection and configuration without the need for explicit bean definitions in XML files or Java configuration classes.

Additionally, Spring Boot also leverages convention over configuration principles to streamline application development. By following naming conventions and placing classes in standard locations within the project structure, developers can take advantage of automatic classpath scanning and bean registration without needing to explicitly specify each individual class.

In summary, Spring Boot utilizes component scanning and convention over configuration to automatically find and register classes without the need for explicit definitions. This helps simplify application development by reducing boilerplate code and allowing for more concise and maintainable configurations.

- AI generated response
shut ledge
#

if it's still misty, then tell us

white ivy
#

"Spring boot uses component scanning to automatically find classes"

This is my question. How? Is there some api like Set<Class<?>> java.lang.reflect.getAllClasses() or something like that

wintry plover
knotty nest
#

scanning for annotations is not smth spring invented

white ivy
white ivy
knotty nest
#

reflection ig

white ivy
#

Bruhh

knotty nest
#

to create a custom annotation processor

wintry plover
#

@white ivy basically, it loops on packages or something like this

white ivy
#

I bet it does that. I am trying to learn how.

#

What is the final java api that allowes to do so

knotty nest
#

reflection allows you to do that

wintry plover
#

Scanning a package isn't supposed by java

wintry plover
white ivy
#

It must somehow call java api to get the classes list as far as understand. It might have it's own abstraction over it but I suspcet something exists such

wintry plover
#

but that's all

white ivy
#

How does it get's path of which class to get

wintry plover
knotty nest
#

Spring scans all the classes in all jars in a classpath

#

this might be pretty helpful

neon pelican
#

remember that it has access to the actual code, so some clever pathing gets u all the classes. Same trick u can use to generate unit tests for any class's primitive types. Scan all the .java files and let it process

lofty garden