Science & Technology

#13 Spring Boot Web

📚 Main topics

Client-server architectureA server processes requests from browser or mobile clients and can retrieve or store data in a database. Modern front ends often handle the layout, while the backend sends data such as JSON or XML. 0:30
Creating a Spring Web projectThe lesson creates a Spring Boot project with the Spring Web and DevTools dependencies, then runs it on port 8080. 3:38
Handling requests with controllersA controller method can be mapped to a URL, such as the homepage or an about page. Using RestController returns data directly rather than looking for a page template. 8:20
Multiple controllers and Spring MVCSeparate controllers can handle different requests. Spring’s front controller checks request mappings and routes each request to the appropriate controller. 15:37

✨ Key takeaways

Web applications need request mappingsA plain Java class and method are not enough; Spring needs controller and request-mapping annotations to route requests. 9:55
Return data or a viewA regular controller can resolve a returned string as a view name, while RestController returns the response as data. 12:30
Controllers can be organized by responsibilityAn application can use multiple controllers for different endpoints, rather than putting every request in one class. 16:08

🧠 Lessons learned

Understand what the client expectsA backend may provide data to a separate frontend, while a traditional server-rendered application can return a page containing layout and data. 2:04
Use annotations to make behavior explicitSpring does not infer that an ordinary class should handle web requests; the appropriate annotations identify its role and mappings. 9:55

🏁 Conclusion/next steps

Further topics to comeThe next lessons will cover additional application layers and how to send data from the client to the server. 15:37

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Transcript excerpt

0:00 welcome back aliens my name is Navin Reddy and let's continue the series on Spring framework now to this point we have worked with spring Boot and spring framework but that was for the standard on application or console based application now we want to focus on the web see the project which we were discussing is actually a web project and of course we have seen the project before but uh if you talk about the layers we do have a client here right now this is a client and then we have a server with different layers and then we have a database

0:30 of course we are using database here so that we can get some data and we want to store that data for the permanent purpose so that will store in database and then we can fetch it uh we are using a server which will accept the request from the client which will process the request uh maybe getting data from database so there different operations here the client is someone who is using this application so you are the client I'm the client so whoever opens this application or the website on the on the browser is a client now this client is not just a web application it can be a

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