Showing posts with label Thymeleaf. Show all posts

Friday, 17 January 2020

Springboot + Thymeleaf - Send user information from UI to controller | Spring Boot Tutorial

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Sending Data from Controller to View

In modern web development, creating dynamic pages is essential. In this tutorial, we explore the "magic" of **Thymeleaf** within a **Spring Boot** application. We'll show you exactly how to capture user information in your backend controller and seamlessly send it to your frontend HTML pages. If you're building a Java web app, this is a must-know skill!

What is Thymeleaf?

Thymeleaf is a modern server-side Java template engine for both web and standalone environments. It allows you to create natural templates—HTML files that look like regular HTML but can display dynamic data from your Java code using simple attributes like th:text.

The Core Steps

Passing user info is easier than you think! Here is the workflow:

The Controller: Use the Model object in your controller method to add attributes (like a "User" object or a simple "username" string).
The Attribute: Add data using model.addAttribute("key", value).
The Template: In your HTML file, access that data using the Thymeleaf variable expression: ${key}.

Why use Spring Boot & Thymeleaf?

This combination is incredibly powerful for Rapid Application Development (RAD). Spring Boot handles all the configuration automatically, so you can focus purely on your business logic and UI. No more complex XML configurations—just clean, readable Java and HTML.

Take Your Skills Further

Dynamic data binding is just the tip of the iceberg. Once you master sending user info, you can move on to handling forms, iterations, and conditional logic. Stay tuned as we dive deeper into the world of Spring Boot! Happy coding!

Using JdbcTemplate with Spring Boot and Thymeleaf | Spring Boot Tutorial

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Dynamic Web Pages with Spring Boot & Thymeleaf

Building a backend is only half the battle; the other half is displaying that data to your users. In this tutorial, we bridge the gap between your database and the browser by integrating Spring Boot, JdbcTemplate, and Thymeleaf.

Key Concepts for Beginners

To make our application work, we focus on how data moves from the database to a visual webpage:

Thymeleaf: A modern server-side Java template engine that allows us to create dynamic HTML pages.
The Model Object: Think of the "Model" as a container that carries data from your Java code to your HTML page.
JdbcTemplate Integration: We use JdbcTemplate to fetch our records and then pass them to Thymeleaf for display.

Step-by-Step Breakdown

1. Setting up the Controller

We update our Controller to return a "View" instead of just raw data. By using the Model parameter, we can "add attributes" (like our list of employees) that Thymeleaf can recognize.

2. Creating the Thymeleaf Template

We create an HTML file in the src/main/resources/templates folder. Using special Thymeleaf attributes like th:each, we can loop through our data and create a table automatically!

3. Viewing the Results

Once the application is running, we simply visit the URL in our browser. Instead of seeing JSON text, we now see a beautifully formatted HTML table populated with real data from our MySQL database.

Discover More Tutorials

Want to see what else you can build? Check out these videos from the channel:

Wednesday, 18 December 2019

Spring boot Internationalization Thymeleaf | Internationalization in Spring Boot

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Going Global with Spring Boot i18n

Ever wondered how websites like Google or Facebook change their language based on where you are? This is called Internationalization, or i18n. In this guide, we’ll show you how to use Spring Boot and Thymeleaf to make your application speak any language!

What is Internationalization (i18n)?

i18n is the process of designing your app so it can support multiple languages without changing the actual code. Instead of writing "Welcome" directly in your HTML, you use a Key that points to a specific translation file.

Step 1: The Message Bundle

Think of a Message Bundle as a dictionary for your app. You create different .properties files for different languages:

messages.properties: Your default language (usually English).
messages_hi.properties: For Hindi translations.
messages_fr.properties: For French translations.

Step 2: How Spring Boot Knows the Language

Spring Boot uses two smart tools to handle this:

LocaleResolver: This decides which language to show. It can check the user's browser settings or a cookie.
LocaleChangeInterceptor: This looks at the URL. If a user clicks a link like ?lang=hi, this tool tells the app to switch to Hindi instantly!

Step 3: Magic in Thymeleaf

In your HTML, instead of hardcoding text, you use the special #{...} syntax.

        <h1 th:text="#{welcome.title}">Welcome!</h1>
    

Thymeleaf will automatically look into your property files and pick the right translation for the user!

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Mastering Spring Boot + Thymeleaf

Building a modern web application doesn't have to be complicated. By combining the power of Spring Boot with the simplicity of Thymeleaf, you can create dynamic, professional websites in no time.

What is Spring Boot?

Spring Boot is a Java-based framework that makes it incredibly easy to create "just run" applications. It handles all the difficult setup for you, so you can focus on writing your actual code.

Why Use Thymeleaf?

Thymeleaf is a modern Server-Side Template Engine. It allows you to create HTML files that can actually display real data from your Java code. It's famous for being:

Easy to Read: It looks like standard HTML.
Dynamic: It updates content instantly based on user input.
Fast: It integrates perfectly with the Spring ecosystem.

How They Work Together

In a typical app, Spring Boot acts as the "Brain," handling logic and data, while Thymeleaf acts as the "Face," showing the user what they need to see.

"With these two tools, you can build everything from a simple blog to a complex e-commerce platform!"

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