Top 10 Spring Annotations to know in 2024

Top 10 Must-Know Spring Annotations for Developers in 2024
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In this video, I delve deep into the world of Spring annotations, breaking down the top 10 must-knows for developers. Starting with @Component, @Service, @Repository to @Controller and more, I explain their importance and usage inside a Spring application. The video aims to equip developers with the know-how of annotations like @Autowired, @Value, @Configuration, @Bean, and @Transactional that enhance the development process. Also ranked are the @RestController, Request Mapping Family, and most importantly the @SpringBootApplication. Join me as we explore these critical elements of Spring and unravel how they impact your code, development process, and overall application performance making your coding cleaner, easier to read, and maintain.
00:00 Introduction to Spring Annotations
00:00 Understanding the Importance of Spring Annotations
01:25 Top 10 Essential Spring Annotations
01:48 Exploring the @Component Annotation
04:24 Diving into @Service, @Repository, and @Controller Annotations
09:16 Unveiling the Power of @Autowired Annotation
10:52 Injecting Values with @Value Annotation
15:01 Configuring Spring with @Configuration and @Bean Annotations
19:58 Managing Transactions with @Transactional Annotation
23:53 Mapping HTTP Requests with @RequestMapping and Related Annotations
23:53 Building RESTful Services with @RestController Annotation
25:47 Bootstrapping Spring Application with @SpringBootApplication Annotation
27:25 Conclusion and Feedback

[@Java.Brains]

A note on @Autowired since this is coming up a lot. Yes, constructor injection (and NOT using annotation-based wiring) is the recommended approach if it works for you. But @Autowired is still an important annotation to learn about because of two things - First, it gives you more control with things like qualifiers in scenarios where construction injection doesn't work. Second, there is a good chance you WILL see it in the code and you should know what it does.

[@aamirakhtar3911]

Thank you so much sir

[@ChooliYip]

Very well presenting for these annotations. One quick question. If I use @Autowired on the field of a class while it has construtor with this field to be injected the value, does spring inject value twice to the field?

[@forinterview2two417]

i think you will face error @@ChooliYip

[@shridhar_rao]

I have around 10 years of experience in The IT Industry - mostly as a Software Web Developer. Many years ago - I guess around 2010 or 2011 approx. - I decided to learn Spring Framework. And yours was the first channel I subscribed to and watched ALL of your videos on Spring framework. You introduced me to the world of Spring Framework, And I will always be thankful to you for that! I still follow your channel - mainly to revise my concepts. Thank you for the awesome work you have been doing since more than a decade! 🙌🙏💫

[@leithold315]

Knew all these, but hearing you explain it solidifies it and fills in gaps in my knowledge. Thanks so much!

[@abdulashiq2173]

Quality content, as usual. Here are a few annotations in my opinion that could be frequently used: @Qualifier - Specifies the bean to be injected when multiple beans of the same type are present @Primary - Indicates that a bean should be given precedence when multiple beans of the same type are present @EnableCaching - Enables Spring's annotation-driven caching capability (Application.java) @Cacheable - Indicates that a method's result should be cached @EnableAsync - Enables Spring's asynchronous method execution capability (Application.java) @Async - Indicates that a method should be executed asynchronously @Scheduled - Specifies methods to be executed on a regular schedule for cron jobs

[@tanjinpeng279]

Appreciate this tutorial. Is very helpful. Hope to see more Spring boot related video in the future !

[@CaliBeast824]

Thank you for this video. I need to learn Spring for my job and this was a great starting point.

[@Vikashkumar-js8hb]

Another conscise and informational content. Short, crisp and To the point... Keep up the good work. 😃

[@venkatasandeepgurram9276]

Greatly explained koushik . Even though i used all these annotations before i got to know more about them . Thanks for the videos .

[@ramonwest3684]

Great video! I’m back in the job market and taking time to audit my knowledge base, this was very affirming and helped clarify a few unknowns.

[@Java.Brains]

Glad it was helpful!

[@er.sahilmd]

Wow i am so happy to see Koushik being back with some knowledge sharing again

[@jaime4066]

Love the quality improvements of the videos!

[@asjjain191183]

I leart the spring from you long back in 2011. You have been the only teacher for me for a long time. I love you.

[@ahmedjaad4940]

I've been here for along time as well, I think I found him when I was a student around the same time, I still have his spring playlist videos on my machine.he is a great teacher indeed

[@pmorah]

The best teacher ever. Thank you a ton

[@aabhasjain96]

Thank you so much sir, keep posting and sharing your valuable knowledge with us.

[@ShivaKumarSatakuri]

Wow this is great. This is what I was telling you last week. Thank you so much for getting this done. Please do consider doing KZbin shorts for most used annotations in the spring framework which you couldn't cover in this video.

[@Java.Brains]

Great minds think alike! 😉 Like I said, I had this in the works. Your shorts idea is great btw. I will try to plan something.

[@svalyavasvalyava9867]

Amazing video and a great refresher for me. Thank you infinitely ☺️

[@virajsh]

Excellent video. I love how you can express your self so clearly.

[@Java.Brains]

Glad you enjoyed it!

[@fenixisalive]

Thanks, the list was well synthesized and very well explained. The autowired one is still relevant despite the comments bellow, if you are only a spring entry level user sure it has no use, but if you want to create some things out of the box in runtime is still very appreciated.

[@mariselvamdheivasigamani578]

explanations on important spring annotations are very clear and useful.

[@tharvik1]

Thanks! Very useful and appreciate the sample code snippets shown for each

[@Java.Brains]

Wow thanks! Glad you found it useful ☺️

[@beth8able]

Thank you so much for this video, loved it. It's very useful and concise explanation. Great job!!!

[@rajkumarvb2602]

Hi Koushik, thanks a lot for all your contents. Waiting for your updated Spring Boot tutorials/bootcamp! ❤

[@Java.Brains]

Will upload soon

[@rgablejr]

Great overview!

[@uniquestreetfood8391]

Very Useful. Please upload videos for Spring 3.0 and above. Spring security also has lot of changes. So something with all of them will be very helpful

[@tabrezshaikh7705]

My excitement level everytime this guy uploads a video 📈📈 We need more content from you buddy 🤌

[@Java.Brains]

More to come! Thanks! ☺️

[@prajwaltirpude8582]

Helpful summary. Ignore the haters as they will always shout at anything

[@funshots6499]

I really like the way you teach, please do spring boot and it’s related videos more often

[@Java.Brains]

Yup, thanks!

[@sharmarahul17]

Excellent video! Thanks

[@raamch]

Great video on annotations in Spring. 6:10 great explanation here.

[@ArjunKumar-zu2kl]

Very nice explanation, thanks for this video....👍👍

[@abhishekkumarroy2815]

always wait for your video😍😍

[@Java.Brains]

Thank you so much 😀

[@hyperborean72]

awesome as always

[@alamaiii]

THANK YOU FOR THE CLEAR AND CONCISE EXPLANATION!!!

[@Java.Brains]

Glad it was helpful!

[@anadivyas4841]

Thank you for this informative video

[@Java.Brains]

Glad it was helpful!

[@robertwhite3503]

I never use @Autowired. If you use the consructor to wire up variables, those variables are automatically wired.

[@cool-aquarian]

🙏

[@Java.Brains]

Yes, I have a pinned comment to clarify. Thanks for your comment!

[@tschalky]

And use the annotation for constructor injection if possible

[@pankajarora5514]

Always waiting for a next vedio.thanku fo suc a content

[@Java.Brains]

More to come!

[@shashankdesai819]

Nice video. It would be nice if you can come up with important annotations for each project such as spring security, spring data jpa etc

[@PR-nb4rb]

Awesome work 😍

[@Java.Brains]

Thank you! Cheers!

[@anthonydifede4510]

Love this channel

[@botane7538]

Thank you for the video

[@venkatduvvuru8369]

I am a fan of you since 2019. Thanks for the valuable content❤

[@sami_yanezcarbonell]

very usefull ! thank you

[@gowthambhat1498]

Dhanyavadagalu Gurugale, love from Bengaluru🫀

[@aamirakhtar3911]

Wonderful video. Superb explanation

[@Java.Brains]

Glad it was helpful!

[@danieljoseph1122]

Thank u sir

[@victorlangat856]

A good explanation.

[@alanmangroo3656]

Great video!

[@Java.Brains]

Glad you enjoyed it

[@rajatpandey4979]

Excellent content

[@Java.Brains]

Glad you enjoyed it

[@10SURA]

Very informative! can you please also touch upon the below annotations ? 1.@Profile 2.@ControllerAdvice 3.@Required

[@JamesStansell]

@Profile marks a bean conditional on the value of the spring.profiles.active property. Use it sparingly because it can make it difficult to reason about the behaviour of your application in different scenarios. In particular do not scatter it throughout your entire codebase.

[@RobertPodosek]

Koushik is the man

[@lucasteixeira1631]

on point!

[@Java.Brains]

Thank you! 😊

[@tyler13923]

excellent

[@vigneshj.m.7969]

Great Video.. I have one question.. we can use @Bean annotation in @configuration and @component class... basically is there any difference in use them in configuration and component. Could you please explain with example it would be really useful

[@lucasteixeira1631]

it is more like stereotyping the class, same as using @Service and @Repository instead of only @Component, in order to tell us which is which, you know? So you could use @Component in a config file, but if you use @Configuration, you're also telling the ones who read the code, that is it a config file.

[@leithold315]

Can you do a similar video for Spring Batch please? There’s a lot of confusion about what the annotations especially with the differences between Springbatch 5 and previous versions.

[@aravindk4608]

What about using only configuration classes to create beans vs using annotations to register the beans. What are the pros and cons?

[@iam_kundan]

It is really very informative video. Thanks for the video. Just a suggestion please don't add the background music, it distracts from the content audio.

[@mils3318]

Is there anything related to the continuation of the started JavaBrains bootcamp?

[@Java.Brains]

Yes! I have Spring Core coming in a week. I'm working on an updated Spring Boot course after that.

[@mils3318]

@@Java.Brains Ok, thank you very much Koushik !

[@thecreativelife7795]

It's better to remove the background music as it disturbs.

[@MutantBikers]

As everyone appreciating content is very good, But audio & video are not synced...However quality is 720p but audio & video should be in a sync. Thanks for listening.

[@Java.Brains]

Everything looks good to me. Can you please check again?

[@MutantBikers]

Sorry It was my Bluetooth headphones I was wearing. Because of that I felt that lag.....Now without that it's perfectly synced. Really sorry 😐

[@Java.Brains]

All good ☺️ Glad it's working fine now

[@pushpendranamdev8920]

Why have you added this background music, it's not required in your videos sir. You are already awesome 👍

[@DasariPrasad-jy3yz]

Could please make one Real time project by using spring boot.

[@Java.Brains]

I have a couple of playlists "Code With Me" series already. I will plan to make more!

[@basavaraj2065]

Could you please check if Quarkas is gaining attention and consider starting a series on the same please 😀👍

[@Java.Brains]

Quarkus is a good alternative. But Spring Boot is pretty much monopolizing the Java backend space tbh

[@amitpadgaonkar8830]

Quarkus would fade away as Spring native becomes mature

[@exploreraadi9376]

Great video sir, but one request , if it's possible then do not add background music in videos , your voice doesn't seems clear some time.

[@ahmedmk534]

isnt Autowired deprecated ?

[@thesilentkiller3882]

@Autowired is recommended as not be used

[@Java.Brains]

Yes, I have a pinned comment to clarify. Thanks for your comment!

[@JPBelanger]

Seems to me that having the application tell spring about itself breaks encapsulation.

[@Java.Brains]

Not so much with an annotation. Annotations are like "tags" or markers. It's not ideal but it's still way better than a compile time dependency.

[@JPBelanger]

@@Java.Brains you application still has a dependency to spring. Wiring should happen in @Configuration classes, that encapsulate the wiring. Spring does not promote this, but it's the right way to do it.

[@Ambesh171]

every imp annotations is cover

[@prasantsaurabh4086]

He looks like satya nadella a bit except the hair

[@binaramani3249]

Hotshot you are not as good as you think in Spring. There is no difference in @Service and @Component so far. Though it can be useful for pointcuts and tools. There are addtional properties for @Controller and @Repository. When Spring sees these 2 annotations then it do extra processing which is not done for @Service.

[@nooruddinraotiwala353]

dont add the background music not useful!

[@VadimChes]

For me it's more easy to understand with light music. So it's not the same for everybody)