Скачать или смотреть How to Iterate Through JSON Objects in Thymeleaf for Dynamic HTML Tables

Learn how to effectively iterate through complex JSON objects using Thymeleaf to create dynamic HTML tables for displaying data in a clean and organized manner.
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Iterating Through JSON Objects in Thymeleaf

When working with dynamic web applications, rendering data effectively on the front end can often pose a challenge, especially with complex data structures like JSON. If you are using Thymeleaf in your projects, you might find yourself needing to iterate through JSON objects to display data in a table format. In this guide, we'll dive into a practical solution for iterating through a JSON object when rendering it as an HTML table in Thymeleaf.

The Problem: Rendering Complex JSON Data

Consider the JSON structure you are working with, which includes information about different reports, such as this:

[[See Video to Reveal this Text or Code Snippet]]

Your goal is to display this data in a structured format using an HTML table like so:

[[See Video to Reveal this Text or Code Snippet]]

To achieve this, you need to iterate over the reportData object, which requires some special handling in Thymeleaf.

The Solution: Using Thymeleaf's Iteration Capabilities

Setting Up Your Context

Before you can display your data in Thymeleaf, ensure you’ve set up your context correctly in Kotlin. You've likely already done something like this:

[[See Video to Reveal this Text or Code Snippet]]

Crafting the Thymeleaf Template

Now, you’ll want to create a Thymeleaf template that can handle the iteration through the JSON data. Here's how you can set it up to create your desired table:

[[See Video to Reveal this Text or Code Snippet]]

Breaking It Down

Table Structure: The outer <table> tag encompasses a header (<thead>) and a body (<tbody>). This layout helps separate the headings from your data rows.

Iterating Through Data: The th:each attribute enables iteration over the reportData. Each reporting variable represents an individual report object within reportData.

Displaying Values: Inside each row, the th:text attribute is utilized to dynamically insert values from the JSON structure:

The company name is accessed with reporting.value.companyName.

The values for the first and last months are fetched using their respective indices from usageByMonth.

Conclusion

By utilizing the iteration capabilities of Thymeleaf, you can efficiently display complex JSON data in a structured HTML table. If you ever find yourself in a similar predicament, give this approach a try! Don't hesitate to reach out for clarifications if you encounter any issues along the way. Happy coding!