Building web applications in Java with Spring Boot 3 - Tutorial

Learn how to build web applications in Java with Spring Boot 3. You'll learn about Spring's fundamentals by creating a REST API that communicates with a database and is supported by a comprehensive suite of tests. By the end of this course you will have learned what you need to start building your own web applications with Spring Boot 3.
✏️ Course developed by @DanVega
💻 Code: github.com/danvega/fcc-spring...
⭐️ Contents ⭐️
⌨️ (0:00:00) Intro
⌨️ (0:02:00) Module 1: Course Introduction
⌨️ (0:19:25) Module 2: Create your project
⌨️ (0:49:44) Module 3: REST API
⌨️ (1:33:12) Module 4: Working with Databases
⌨️ (2:24:12) Module 5: Rest Clients
⌨️ (2:44:55) Module 6: Testing
⌨️ (3:27:50) Conclusion
🎉 Thanks to our Champion and Sponsor supporters:
👾 davthecoder
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👾 Serhiy Kalinets
👾 Justin Hual
👾 Otis Morgan
👾 Oscar Rahnama
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[@Jake295A]

It's hard to find a spring boot tutorial that goes over the basics and the foundations like this one does. Many tutorials out there jump writing into writing code which is very frustrating when you are new and don't understand what the purpose of everything is.. This is massively helpful! Thanks!

[@thegeeekynerd]

Are there any prerequisites for this course?

[@bobHAYES21]

​@@thegeeekynerdAverage knowledge of Java. Like Classes, Arraylist, Objects....Nothing too much, but you definitely need a couple of months of Java practice

[@sugoi5240]

this course touches the basic of spring framework, its actually crazy how huge the spring ecosystem is

[@drexex0f]

yes

[@drewintech9257]

I'm transitioning from front-end development and have a basic understanding of Java. I decided to dive into learning the Spring framework, and I must admit, it's been quite challenging to grasp.

[@drexex0f]

@@drewintech9257 bro that's tough and also do DSA bro through Java

[@andiuptown1711]

*Literally was watching this dude’s channel yesterday and been researching Springboot all week …. I’m scared 💀*

[@potaetoupotautoe7939]

same here dude

[@DanVega]

What are you scared of? Feel free to reach out if you have questions.

[@aammssaamm]

They tracked your search. 😂

[@andiuptown1711]

@@DanVegathat KZbin is stalking me 😂😂

[@Seb0927]

Same

[@Nemomaycarry]

Thanks for introducing Spring Boot 3 to us!

[@mohammedjaouni-lw9dw]

Thank you for this huge amount of information, and I hope that you will develop a launcher or map to master back-end using Java.

[@jixuanchong4744]

Thanks for the such a wonderful tutorial. Hope there more spring boot tutorial in the future

[@thedapperfoxtrot]

Another one added to the "Coding" playlist I've yet to truly tap into. 😂😂 Edit: I've never wrapped my head around making web apps outside of JS though, so I'm genuinely curious!

[@Dr_Larken]

You’re missing out then, Mistakenly, I spent the first couple years of coding focusing on one language. Building literally everything with it! However, it annoyed everyone when they would see my contribution to whatever project we were working on. Perplexed on why I did it only in ArnoldC!

[@WristGameShardee]

Ive been focused on dotnet buf i want a better arsenal cuz dotnet is just easier on windows. I want something even more portable

[@jerichiyo]

I hope you also add java or springboot curriculum on your website

[@kalouskm]

Thank u so much for this valuable content that u shared, i hope to see another

[@chirayumishra1185]

@danvega is one if the great pioneer in Java Spring space. He has been long here from the time of blog writting to podcasts. Good to see him again and that too on my one if favourite channel @freecodecamporg

[@DanVega]

Thank you so much!

[@theogenembonimpaishimwe1567]

This tutorial arrived at the perfect moment. Regards

[@ukcodes]

Thanks for this great lesson!!!

[@z00lus]

Nice to see even java champion also produce red stack traces sometimes 😀 Thanks for very useful video, learned some new spring boot 3 things from it.

[@justindouglas3659]

can we have a tutorial where before yous tart with spring you first learn to work with jax-rs and tomcat and then build restful services with things like jersey or the jakarta servlet api??? thnx again for the tutorial.

[@namminh4336]

Thanks for great lesson ❤

[@albertmabo5322]

spring is so huge its overwhelming

[@brooklynwright7109]

This was a great tutorial, thanks Dan!

[@garv1202]

Please please post more content of spring

[@davidalex684]

Nice, this is entertaining for us programmers and developers.its just fun learning this would ya. Pls who agrees

[@MindIsLikeFullMoonInFall]

Love the tutorial, thank you! I want to ask, in Module 3: REST API, you mentioned using creating new RunRepository() in constructor could lead to millions of instantiation due to requests, but isn't @RestController a singleton? Won't the same controller always be called for all the requests and the constructor will only instantiated once?

[@JSH1994]

@DanVega you're a great teacher!

[@ouadalissifou1786]

another banger😮

[@rizkysiregar]

thanks dan for sharing

[@albertmabo5322]

Thanks

[@solnone]

Thank you

[@dreamisover9813]

Great one!

[@ChevaliersombreJVC18-25]

Thank you vert much for your course/

[@philfrei1]

Does this course cover Spring Security? I'm looking for a nice example with both user registration and user login pages.

[@H_G2013]

Great video - can you do a video on how to create integration tests

[@coderprakash]

Thanks for bringing for springboot please bring it same for React Frontend

[@BecauseZiko]

Hey Great Tutorial, for me it is not clear how to operate over multiple tables in my rational database.

[@matthewerwine8333]

great video

[@andredearaujorodrigues7725]

After you create a course about spring security, i can't understand security in spring. Thanks.

[@rooreg4611]

At what point do you show the end application?

[@k4nishkk]

Few Keywords: (1st hour) Annotations Context Record Module Controllers Build tools

[@codexamofficial]

Although the video is so informative and good, it would be nice if you used a dark theme

[@DanVega]

I actually prefer dark theme but If I would have used that I would have gotten comments that they wish I used light theme. I prefer dark when coding but I think for presentations light theme works best. Hopefully you can dim the brightness and survive light mode.

[@mcflanky8340]

@DanVega the test code for run controller is not updated and doesnt work

[@cromuelbarut9859]

awesome

[@realslickshady]

2:08:02 I’m having an issue connecting to the docker. It says authentication failure and can’t establish a JDBC connection, is there some hidden configuration that perhaps wasn’t shown in the video? Because I tried connecting to a local PostgresDB and it worked, however the docker one failed

[@lodynemark]

Same issue i got when connecting Database installed in Docker. @DanVega Kindly assist us.

[@realslickshady]

@@lodynemark I managed to get past it. All i did was to download postgres locally on my pc and create a new db, and i provided the name of that db in the yaml file. thats all

[@Anonymous-ok6us]

@@realslickshady I also tried to locally setup postgres on my machine but its not able to pick up the create table query from the schema file and giving me the error that Run table doesn't exist. Did you do some extra configuration in your properties file apart from setting up the connection to the database?

[@realslickshady]

@@Anonymous-ok6us I created a new user and password in PgAdmin and used that in my properties file

[@ciromaia9748]

I think its some kind of interference from the local postgres service. You can stop the service or uninstall the local postgres. It worked for me.

[@tracynnnn]

Module 5 - Creating a REST Client that makes calls to another service * Web Clients for Spring Boot was created to use as part of Spring Web Flux. Easier to understand and learn compared to other APIs * Create records that represent the User and any needed custom fields * Create RestClient and implement requests using restClient * Create HttpClient interface Module 6 - Testing

[@seasn5553]

Bruh I was talking today about this in a project proposal for my class

[@rvms6947]

Op❤

[@lauris5275]

Im learning spring boot, its has so little tutorials. Why?

[@ramana9525]

How to handle two differnt versions of backend in spring boot3 ? for example in version 1 , we had a simple data model , but in the version 2 we had a data model with different relations ( one to many ) , we have two versions of backend app in deployment ,where as the frontend we developed with Angular also with two differnt versions , How to Handle this kind of situations where version1 of frontend only will connect to version1 of backend app and v2 will connect only with V2 of backend ?

[@andrean40]

go to your dependencies in the pom file and change the versions

[@KaznarahAndrinarivo]

I'm waiting for spring security💀

[@mahendranath2504]

Wow thank you so much for sharing the knowledge 👌👋🫡👍😊🙏

[@zigitovich]

Team Dan here 💯

[@rafiquemohammed3029]

I appreciate and thanks for the efforts and helping others to learn but the example "Run" and CommandLineRunner etc are quite confusing. A simple ToDo example is alot more simpler to understand for the beginner or ppl coming from other programming language. Thread.run(). CommandLine.run() and the example Run all these are difficult to understand while you explain it and whenever u use the word "Run". All i am hearing constantly in this video are Run, Runnerz, Runner, Runner.run, runRepository, run this and run that 🙂

[@ProgrammingWithRabbani]

Please someone mention Prerequisites of this tutorial.

[@dienvidbriedis1184]

in java world you need to deal with all of this just to avoid writing less than 100 line long php script from scratch?

[@andiuptown1711]

*No we deal with all this to get a job*

[@superhumandose]

I tried initializing the appllicaton in both Intellij and VSCode and I always get the error that "org.springframework.boot" and "org.springframework.boot.autoconfigure.SpringBootApplication" cannot be resolved, therefore I can't even start

[@kitchiu4743]

I just give up fixing these errors at the mid of this tutorial...

[@BattleFieldGalaxy]

Anyone else got an error (Application run failed) after launching docker and tried to rerun the application? 02:07:30 in the video.

[@realslickshady]

yes

[@k4nishkk]

Model view controller Bean - Spring controls its lifecycle Repository Interfaces

[@Techfunn45]

sir can we develop mobile app using python...??

[@darkKingGaming493]

Yes but is not suggesting

[@destocot1729]

any experiences springboot users have recommendations where to bounce off to after this video

[@DanVega]

My channel has some useful content on there

[@shaunakchandra737]

can anyone explain why this line is fine runs.stream().filter(run -> run.id() == id)).findFirst().get(); even if run.id() this function is not defined

[@shaunakchandra737]

sorry mb its just how records work didnt knew that

[@lopamudramohapatra7354]

❤

[@Techfunn45]

Can we make mobile app using python...?? Please tell me

[@StfuSiriusly]

bro just google it. what are you asking on youtube??

[@bullyversal5313]

Yes you can but it won't be efficient I guess..

[@Techfunn45]

@@codexamofficial thanks bro

[@Techfunn45]

@@bullyversal5313 okay

[@lazarokabira2945]

Another video added to my endless list😂

[@khunkham5315]

I want to know about Devin . Please make a video about that.

[@forheuristiclifeksh7836]

40:26

[@forheuristiclifeksh7836]

20:00

[@forheuristiclifeksh7836]

27:29

[@amaanullah13]

Sir 40 minutes in it and everything looks so tough, even though I fairly know SpringBoot.

[@ShipWreck68]

I get what you are saying in this video but there needs to be an outline maybe of the process. Then describe why each part is used and how its wired together. Watching this video I can see there is so much "assumed" understanding of what is needed to make the project. Its very hard to follow. Its clear this guy knows what he's talking about, but its very difficult to follow.

[@oskar-in1dz]

are u the best arizona ??

[@lahcenaouina]

i meet him in devxx

[@DanVega]

Let's hang out next time our paths cross!

[@lahcenaouina]

@@DanVega Why not , keep pushing u doing well

[@waveEdu]

Truly first

[@devdhaif]

Why are almost all java tutorials in a light theme ? 🤔

[@kallymashigo6532]

To make your brain think it's easy while it's opposite but you won't notice it because color does have impact😂😂

[@user-jx7qu9xl2b]

the white screen is killing

[@user-hx2it9go3r]

Please try in flutter app

[@creamyturtle69]

some things you click through really quickly and it's a bit difficult to follow. also, using all of those copilot annotations and keyboard shortcuts make it tricky for us mere mortals to see what you did explicitly

[@Dr_Larken]

Бесплатное печенье!

[@vineetkumar9371]

This is not from scratch???

[@DanVega]

If you have intermediate Java fundamentals covered yes we start this project from scratch.

[@sudhakarpandey7372]

use dark theme please✌✌✌✌✌✌✌✌

[@joaofelipe2060]

Although looks unconfortable to work with, I think is better to use light theme when presenting code, as you can read better in small screens like a smartphone. But when working, I agree dark theme in everything !! 🙂

[@sudhakarpandey7372]

​@@joaofelipe2060 No, it doesn't dark theme is the best, Period!!!!!! 👍👍👍👍

[@imadbenmadi]

bro using light mood

[@chirayumishra1185]

First comment

[@neelpatel4330]

first

[@Blaze_MediaTv]

First

[@harshvardhanpandey3597]

1st comment here in 5sec 😂

[@kenamreemas3295]

Congratulations on another term as russian president Vladimir. Oh nice tutorial too. didn't know you had a thing for programming.

[@illegalsmirf]

Omg Java is so verbose you need copilot to generate hundreds of lines of code to do a simple thing

[@DanVega]

You should watch my latest video... Java is NOT verbose. I like using copilot in my personal development and for presentations 🤷‍♂

[@HAAAAAA614]

Lol grow up. C++ and rust is just as verbose. You're just echoing out what tech influencers that couldn't finish cs 101 said

[@gtbaba123]

acc to me Spring boot fresher jobs are now dead. It's insanely rare to get any job for freshers in Spring boot. Im from India, work in Spring boot and spring boot fresher job are dead now. I'm not demotivating you guys, just guiding you what to study and how much to study acc to market demand.

[@hashimahammad5355]

then what should we study?

[@andiuptown1711]

Key words *in India*

[@gtbaba123]

if u r in college and u have 2 years then go for Rust and JavaScript, JS will help you for Frontend and Backend and in future Rust will gain demand. But do JS first in depth even if u r a fresher u should Hv skills like 1 year experienced of engineer @@hashimahammad5355

[@tylerdurden4563]

This tutorial sucks. One of the worse ones out there

[@Techfunn45]

sir can we develop mobile app using python...??

[@mohammedjaouni-lw9dw]

Yes you can

[@Techfunn45]

@@mohammedjaouni-lw9dw how please can you tell me...??

[@demshano7690]

For mobile apps, Python can be used with frameworks such as Apportable, Kivy, and Toga to make cross-platform development possible.

[@Techfunn45]

@@demshano7690 I already make one app using kivy but it cannot open in my mobile phone why...??

[@forheuristiclifeksh7836]

36:22