Скачать или смотреть Connect HTML to Java! Build a Spring Boot Number Checker | Java Logic Even, Odd, Positive, Negative?

Connect HTML to Java! Build a Spring Boot Number Checker | Java Logic Even, Odd, Positive, Negative?

Connect HTML to Java! Build a Number Logic Web App (Spring Boot)

#SpringBoot #Java #Thymeleaf #WebDevelopment #CodeCrush #CodingProject #LearnJava #SpringMVC #FrontendToBackend

📚 Playlist: Spring Boot Projects Playlist -    • Spring Boot Projects  

🛑 STOP building boring Console Applications! It’s time to level up. In this video, we leave `System.out.println` behind and build a real interactive web application using Spring Boot and Thymeleaf.

We will create a "Number Analyzer" that takes input from a user on a beautiful HTML page, sends it to a Java backend to check if it's *Even/Odd* or **Positive/Negative**, and displays the result instantly.

If you are a beginner looking to understand how the Frontend (HTML) talks to the Backend (Java), this is the perfect mini-project for you.

👇 IN THIS VIDEO, YOU WILL LEARN:
✅ How to serve HTML pages using Spring Boot
✅ How to use Thymeleaf to display Java data in the browser
✅ How to grab user input using `@RequestParam`
✅ Writing the Java logic for Even/Odd & Positive/Negative
✅ Handling form submissions without JavaScript!

KEY TERMS EXPLAINED (For Beginners)
🎮 @Controller: Unlike `@RestController` (which returns raw data), a standard `@Controller` is used when we want to return a visual HTML page to the user.
🍃 Thymeleaf: A Java template engine. Think of it as a "bridge" that allows Java code to live inside your HTML files. It lets us inject calculation results directly into the webpage.
📥 @RequestParam: This is how Spring Boot "catches" the data sent from the HTML form. If your input box is named `number`, this annotation grabs that value so your Java code can use it.
🎒 Model: Think of the `Model` as a backpack. When your Java code finishes a calculation, it puts the answer in the "backpack" (Model) so it can be carried over to the HTML page for the user to see.
📝 Form Action: The HTML attribute (`action="/check"`) that tells the browser exactly which URL endpoint to send the user's data to.

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