Building web applications in Java with Spring Boot 3 - Tutorial

[@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

[@diasutsman]

@@drexex0f Why though, just use python

[@amansingh.h716]

@@drewintech9257 so whats the status now , have u learned spring ??

[@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

[@bailieb123]

@@thegeeekynerd I started learning java from complete scratch, granted i have decent to advanced skills on python as a college student, i started learning on monday it is now thursday and ive comfortably built 2 web apps hooked one up to thymeleaf for ui, still not 100% on the beans and components etc but enough to get by. It depends how quick you pick it up

[@albertmabo5322]

spring is so huge its overwhelming

[@vaisakh_km]

Somehow it's less overwhelming in telisko's videos

[@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

[@sammyalyooi8777]

Thanks!

[@Nemomaycarry]

Thanks for introducing Spring Boot 3 to us!

[@theogenembonimpaishimwe1567]

This tutorial arrived at the perfect moment. Regards

[@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

[@vaisakh_km]

Yes, truly missing out... :) don't wanna thinking in deathbed should have tried out php... i felt really awesome writing servers anything other than js...

[@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.

[@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!

[@bogdogun5675]

For those who can't get past the "Web server failed to start. Port 8080 was already in use." error, go to application.settings and add server.port=8090 After you did this you will be working on port 8090. (You can add whatever port you like)

[@bj2185]

I appreciate it, but this tutorial is a 2/5. You cannot use SQL highlighting or built in databases or automated HTTP requests on Community IntelliJ. You shouldn't use copilot in tutorials to generate large blocks of code without explaining them. It's a good thing I was able to work out postgre and docker on my own else I would have had no chance. I had to refactor the huge chunks of code you just paste in multiple times because it didn't work on my end. Theres no description of what beans, config, dependency injection or containers are, and tests that don't work? "I'll just fix this in the final repo" (It's not fixed in the final repo). For the delete test you can fix it (and I think this is the right thing to do but who knows) by adding a "when" mocking line that returns an optional, seen further up the test class. Also, the json pulled in for one of the final tests has been changed and the test will no longer work.

[@Reversd2u]

These issues pose a good challenge for the learner. You must have learned quite well to be able to criticize the tutorial, which is a win in itself. This is a decent tutorial, which is saying a lot considering it's free.

[@vaisakh_km]

​​@@Reversd2u it was really hard to follow along... :( tomorrow i have a interview telusko's ~5h tut i completed in 2x speed in 3h, and impliment myself, but this took whole day... still parts are not clear.. but telusko don't show many best practices like using Constructor based deoendency injection instead of Autowiring or properly setting http status.. so in that regards this is good, hence i watched this

[@tinayetsinakwadi8906]

Considering its free of charge, and being taught by a world class developer, id be a little more respectful with the comments. If you did not like it, that's fine, you can move on and let others enjoy

[@yugansharora3787]

​@@tinayetsinakwadi8906I think some criticism is good for the tutor as well as he also wants an unbiased review of his work He would absolutely love this comment as this does not disrespect him in any way and highlights his point of improvements

[@jerichiyo]

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

[@nathan_Eth]

I have successfully completed this course. Spent about 6 hours with follow-up coding. Thank you .

[@bkbkbkkkk2471]

U didn't get any error in it ??

[@nathan_Eth]

@@bkbkbkkkk2471 it has every where. there are some outdated part. but try to copy and the error and refer with CHATGPT. you will find the error fast

[@Atpataang]

U had made the project

[@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.

[@frank0_0]

Thank you for this amazing course,as a beginner in spring framework i learned alot and i wish you can upload more courses like this

[@nikobelich5470]

These days I should fast switch from Node.js to Java. And this tutorial is really useful 4 me. Thanks a lot!

[@jixuanchong4744]

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

[@lonleybeer]

just started learning Spring, the possibilities are huge

[@King_houssin]

you think spring is gonna stay for a while in the market ??

[@lonleybeer]

@@King_houssin i believe so

[@tinayetsinakwadi8906]

Wow this tutorial is really great for starting out. It gives you all the information you need to start using Spring. After this tutorial you'll become more confident to find your own flow and create your own new apps

[@ShaunRust]

A great introduction to the Spring Framework. Worth watching !

[@kalouskm]

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

[@garv1202]

Please please post more content of spring

[@dses6611]

Just finished the course today and it is so awesome to gain a briefly concept about SpringBoot, thanks man!

[@bkbkbkkkk2471]

Hey dude u did it on windows or mac??

[@dses6611]

@@bkbkbkkkk2471 Mac w/ M1 chip

[@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.

[@davidalex684]

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

[@k4nishkk]

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

[@sudipchakraborty3901]

It's a great course indeed! Thanks Dan!

[@ouadalissifou1786]

another banger😮

[@lazarokabira2945]

Another video added to my endless list😂

[@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

[@arnoldtuber]

Big respect to Dan Vega

[@ukcodes]

Thanks for this great lesson!!!

[@lagunayellowdev]

47:50 Can you turn on the wrap option on your editor so we can follow up more easily? It's hard to figure out what are you doing when the cursor is hanging around near the border line of the editor. Other than that, everything are perfect.

[@zb2747]

Coming from node and deno. Spring Boot makes building REST APIs even more of breeze. Most definitely an enterprise/production ready solution

[@Ann-learns]

1:11:44 Creating various CRUD OPERATIONS

[@aguelejoseph5753]

Thank you. Thank you and Thank you for this course. I am absolutely grateful

[@namminh4336]

Thanks for great lesson ❤

[@waveEdu]

Truly first

[@aasiksihaab46]

What is the copilot you are using?

[@terrificfrogg8377]

Thanks for the amazing tutorial also Spring Boot is OP...i love it

[@farhadzada3162]

Thanks for your beautiful course!

[@xtccy]

How are your logs beautified with colors? Please explain, It makes a HUGE difference to readability 🙏

[@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?

[@danielwilkowski5899]

Near 1:00:00, when the author tells you that you should not use "new", because Spring is an "inversion of control framework". That's kind of a sad irony. Because normally Inversion of Control means that the flow of control goes agains the flow of the dependency (hence the "inversion"). That's supposed to reduce coupling to frameworks and libraries. The irony here is, that by not using "new" but instead injecting the class into the controller, you're actually coupling your design to spring.

[@JSH1994]

@DanVega you're a great teacher!

[@saipavand4064]

time stamp 40:00 discussion about code structures 50:00 discussion about controlleer 52:00 annotaions 1:01:13 dependency injections expalined all the get and post how to do it from her on wards contine from here 1:17:16

[@coderprakash]

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

[@matthewerwine8333]

great video

[@brooklynwright7109]

This was a great tutorial, thanks Dan!

[@andredearaujorodrigues7725]

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

[@raghuvamsi27]

Op❤

[@Abazigal100]

Tutorial is good. One question: Is there a way to generate views (using Thymeleaf maybe)? The @RestController doesn't help render webpage. You can use @Controller but then you might need some refactoring to get REST API functionality

[@dreamisover9813]

Great one!

[@rooreg4611]

At what point do you show the end application?

[@padsundar]

What is AI plugin used in intellij. Is it Jetbrains?

[@duermes]

github copilot

[@albertmabo5322]

Thanks

[@cyberchef8344]

No judgement question - purely curious. For those of you just starting down the programming and/or web dev path… what made you choose Java over something like Python, JavaScript, C#, etc…

[@Flyrin_OG]

It's like when you chose a gamertag on XBOX at 12 years old. Java is the language I chose, and the language I became the strongest with. Now I am learning spring boot.

[@koolam5158]

Sir thanks so much!

[@BattleFieldGalaxy]

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

[@thesarfo1]

yes

[@CodingWithClapper]

@BattleFieldGalaxy Yes. I was stuck on this for a few days. This was the error that was really messing me up: "Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Java 8 date/time type `java.time.LocalDateTime` not supported by default: add Module "com.fasterxml.jackson.datatype:jackson-datatype-jsr310" to enable handling" I'm running a newer version of Spring Boot than Dan and needed to add the jackson-datatype-jsr310 dependency to my pom.xml and then add it to the RunJsonDataLoader by adding this line to the constructor: "this.objectMapper.registerModule(new JavaTimeModule());" I'm not sure if that was your error too but I hope it helps!

[@SergiosKolios]

The issue for me was that spring framework was not picking up the `docker.yaml` file. After installing and uninstalling everything twice, restarting the IDE (Intellij) solved it for me.

[@aspirevisiondrive6748]

Hey please create some on spring security, Oauth, OIDC

[@drugoviic]

spring initializer should be a cli tool, what is that

[@Akaneyesolution]

Proctored exams, uh, and so, uh, I at this point I recommend that you try to go to a test center. But um, if you just want to get even certified and you really excited, uh, definitely go take it online. All right. Now, we just have some uh remaining questions here. So what does it cost to take this exam? It's $100 USD is the most inexpensive native assertification. Um, it's going to take 90 minutes. Oh, that's the time that you're allocated during the uh, the example. It doesn't actually take that long. You could probably get a done in under an hour again. It's not a very hard certification but I do recommend that when you go to the exam you maximize, um all of your time and review questions, uh, because it is a very good habit to get into when you take exam. There are 65

[@H_G2013]

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

[@philfrei1]

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

[@CodingWithClapper]

Great tutorial. If you use IntelliJ IDEA Community Edition version 2024.1.2, the auto build does not work. At least, it doesn't work for me and I have found no fixes

[@alphamutuma3743]

I literally stopped from there but I am going to find another way

[@ChevaliersombreJVC18-25]

Thank you vert much for your course/

[@h.k3260]

What kind of extension did Dan use to get the JSON formated that way

[@rizkysiregar]

thanks dan for sharing

[@xxxxxjjjjj62]

not quiet understanding this, any sql statement inside the resources/data.sql will be automatically executed against the real db instance?

[@MalotePls]

1:17:40 When using the update method how come u use run.set() if the run class has no setters?

[@MalotePls]

nvm im sure im dyslexic

[@thesarfo1]

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.

[@thesarfo1]

@@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]

@@thesarfo1 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?

[@thesarfo1]

@@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.

[@abdulbasitsalah2918]

Thank you 😊 for this awesome course

[@finnianthehuman]

Thanks for the great video. I don't understand why the DB continues to be accesible through port 8080 when the local machine connects to the docker container through port 5432? Or, why is it not possible to make GET requests to port 5432 on my local machine? Is it just because the port 5432 is only the port used to connect the app to the database, but the app itself is still handling HTTP through 8080? So an incoming request hits 8080, then goes through 5432 to get to the database?

[@Iamakbart]

Sorry, I couldn't figure it out, how did he create the files in the api folder (1:21:10)?

[@KhanhTran-su3pw]

maybe it has been edited and he paste the files in that api folder

[@joaovitoroliveira6416]

After configuring the RunJsonDataLoader file when I run the program I always get the "throw new RuntimeException("Failed to read JSON data", e);". Has anyone had this problem? Can anyone tell me how to resolve this?

[@avijitpal1421]

Make sure your Json is valid , you have proper read permission, file path or url is correct or not

[@naoufalbelechhab6744]

W

[@mahendranath2504]

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

[@BecauseZiko]

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

[@seasn5553]

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

[@solnone]

Thank you

[@uzornwachukwu3395]

Please how do we enable auto complete for custom queries like the findAllByLocation? Mine does not auto complete

[@veereshmangalore006]

Hi guys Should i learn java dev or mern

[@mcflanky8340]

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

[@ChinaNumbaOne1]

Would it be wrong to want to place the JsonDataLoader into a 'dev' folder? For instance, I'm building an application where table entries cannot exist without a foreign key from another table. For example, a 'run' table entry cannot exist without a foreign key 'user_id' from the 'user' table.

[@cromuelbarut9859]

awesome

[@ProgrammingWithRabbani]

Please someone mention Prerequisites of this tutorial.

[@Akaneyesolution]

uh, and so uh, uh before the only way you could take this exam you had to go in person to a test center, but now uh that Pearson view is part of

[@zigitovich]

Team Dan here 💯

[@destocot1729]

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

[@DanVega]

My channel has some useful content on there

[@allanbranson4693]

Can anyone help with this error : Caused by: Can't infer the SQL type to use for an instance of dev.Branson.RunnersAppSpringBoot.Run.Location. Use setObject() with an explicit Types value to specify the type to use.org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [INSERT INTO Run(id, title, startedOn, completedOn, miles, location) values(?,?,?,?,?,?)] am stuck at 2:09:10

[@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...??

[@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 ?

[@hitheshc4088]

Did anyone get an Internal Server Error at post-method at 1:16:00? if so let me know how to resolve it.

[@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

[@amalik4273]

2:21:42 My code completion shortcut isn't showing these suggestions. Just USERS and LIST

[@hipolit2200]

too chaotic

[@fromzero6545]

Getting an application context fail to load on the testing portion, unable to solve it :'

[@KaznarahAndrinarivo]

I'm waiting for spring security💀

[@thefabffgamer3245]

good tutorial, it's just my mind can't comprehend it and now i am getting error and thus i left it after database part. thanks tho

[@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...