Category: Tutorials
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OAuth 2 and Google Sign-in for a Vaadin Application
In this guide, we learn how to provide users with the ability to sign in to a Vaadin application using their Google account. This is a lightweight alternative to integrating a fully-fledged identity management server or SSO Kit into your stack. Using OAuth 2 in this manner already enhances security ...
Three tips to integrate your Vaadin app into your existing website
Nowadays, it is rare to implement all software with a single technology. There are different teams and requirements, which is a good reason to allow a certain amount of variance in the software toolkit. The same goes for UI frameworks, and that's the way it should be. Hosting static HTML files ...
A minimal zero-downtime deployment using nginx & Spring Boot
Starting Java web applications is not an instantaneous process. It is not rare to see tens of seconds for some applications to boot. Although you can get an almost instant startup time if you leave out Hibernate and run Quarkus on GraalVM, that’s not the reality we live in. During development, ...
Basic Tips for Improving Accessibility
User Experience is a core value of the Vaadin team. This post is part of our series on UX in the Enterprise and highlights the importance of accessibility in building modern enterprise web applications. In this article we're going to go over some basic tips and tricks for improving the ...
Read and Display a CSV File in Java
This guide demonstrates how to import a CSV file in Java and display it in a data grid. In this guide, we create a web app that enables users to upload a CSV file to the server, where the file content is processed, and displayed back to the user’s UI inside a data grid. The web app is developed ...
Packaging and deploying Spring Boot applications as WAR files
This guide explains how to: Package a Maven-based Spring Boot application as a WAR file Deploy a WAR file to Apache Tomcat Deploy a WAR file to Eclipse Jetty Packaging a Maven-based Spring Boot application as a WAR file To change the packaging in a Maven-based Spring Boot application that was ...
Enable Users to Upload & Download Files
This guide demonstrates how to create a web app that enables users to upload and download files to and from the server in Java. In this guide, we create a web app that enables users to upload and download files to and from the server. The UI allows users to select local files to be uploaded to the ...
Securing Vaadin apps with Spring Security
Getting security right is critical when building web apps. The upside of building a web app is that people can use it wherever they are, on any device. But you need to ensure that only the right people are able to access it, and that they have access to only the features you intended. In this ...
Dynamic Theming in Vaadin Flow
The application with different theme variants Whether for multi-tenancy or user preference, the need to dynamically change the theming of an application is a common business application need. In this post, we show how it’s done using CSS custom properties and HTML attributes. Vaadin 14.6 brought an ...
