Скачать или смотреть How to Solve the GoogleMap API Not Rendering in Your Java/Spring Boot Application

Discover how to effortlessly generate a Google Map in your Java/Spring Boot application with this step-by-step troubleshooting guide for rendering issues.
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This video is based on the question https://stackoverflow.com/q/63066288/ asked by the user 'Alexandre Guerreiro' ( https://stackoverflow.com/u/8240535/ ) and on the answer https://stackoverflow.com/a/63071870/ provided by the user 'Alexandre Guerreiro' ( https://stackoverflow.com/u/8240535/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting Google Map Rendering Issues in Your Java/Spring Boot Application

Working with interactive maps can significantly enhance your web applications by providing an engaging user experience. However, developers often encounter challenges while integrating Google Maps, especially when working with frameworks like Java/Spring Boot and Thymeleaf. If you find yourself in a situation where the map doesn't render despite your best efforts, you're not alone. Let's dive into a common issue related to Google Maps API and how to effectively solve it.

The Problem

You've created a web application using Java and Spring Boot that utilizes Thymeleaf for templating. You have successfully integrated the backend with the frontend, and your Java controller passes latitude and longitude data to an HTML page. However, when you execute your application, the Google Map simply does not appear!

In this scenario, your setup is likely similar to this:

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

Along with your JavaScript code that initializes the map.

Despite confirming that your lat and lng variables are correct, the map remains elusive. So, what could be the underlying issue here?

The Root Cause: CSS Styling

After careful consideration and some trial and error, it appears the issue primarily stems from the CSS styling applied to the map container div (<div id="map">). As it stands, setting both the width and height to 100% can lead to the map not being displayed properly. The map requires explicit size dimensions to render correctly. By setting a fixed height in pixels, you can often resolve this rendering issue.

Solution Steps

Change the CSS Styling of the Map Container: Modify the style attribute to give the map a fixed height instead of 100%. Here's an example of what the updated code should look like:

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

Verify that the JavaScript Initialization is Correct: Make sure that the initialization of the map is executed after the document is ready and the coordinates are correctly passed to the initialization function.

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

Check Google Maps API Key: Ensure that your API key is valid and the required services are enabled within your Google Cloud Console.

Conclusion

By making these small adjustments to your CSS and ensuring that your JavaScript code is executed correctly, you should be able to render your Google Map as intended. Remember that troubleshooting often takes some back-and-forth adjusting and testing, so don't hesitate to keep experimenting with CSS values until you find what works for your layout.

If you follow these guidelines and utilize explicit heights for your map containers, you'll find that your Google Maps integration becomes far more reliable. Happy coding, and may your maps always render as expected!