In this tutorial, we will create a Spring Boot application and secure it using JWT (JSON Web Tokens) with JWS (JSON Web Signature) and JWK (JSON Web Key) in Spring Security OAuth2. Prerequisites Basic understanding of Spring Boot and Spring Security JDK installed on your machine Maven or Gradle installed Step 1: Setup a…
Two-Factor Authentication (2FA) adds an extra layer of security to your application by requiring users to provide two different authentication factors. In this tutorial, we'll implement Two-Factor Authentication in a Spring Boot application using Spring Security. Prerequisites Basic understanding of Spring Boot and Spring Security JDK installed on your machine Maven or Gradle installed…
Keycloak is an open-source Identity and Access Management solution, providing features such as Single Sign-On (SSO), OAuth 2.0, and OpenID Connect. In this tutorial, we will integrate Keycloak with a Spring Boot application for secure authentication and authorization. Prerequisites Java JDK installed on your machine Maven or Gradle installed Keycloak installed (You can download…
OAuth2 Social Login is a common feature in modern web applications, allowing users to sign in using their social media accounts. Spring Boot provides robust support for implementing OAuth2 authentication with popular social platforms like Facebook, Google, and GitHub. In this tutorial, we'll guide you through the process of setting up OAuth2 Social Login…
In distributed systems, network issues and transient failures are common challenges. To handle these scenarios gracefully, it's essential to have retry mechanisms in place. Spring Retry, a subproject of the Spring Framework, provides a simple but powerful way to add retry capabilities to your Spring Boot applications. In this tutorial, we'll explore how to…
In a Spring Boot application, the concepts of Context Path and Servlet Path are essential for understanding how requests are handled and mapped to the appropriate controllers. These paths play a crucial role in routing incoming requests to the correct endpoints. In this tutorial, we'll explore the differences between Context Path and Servlet Path…
In modern microservices architectures, communication between services is a critical aspect. Spring Boot provides two powerful tools for making HTTP requests to other services: @FeignClient and WebClient. In this tutorial, we will delve into these two approaches, discussing their differences, use cases, and providing examples to help you decide which one suits your needs…
In the Spring Framework, dependency injection is a fundamental concept. It allows you to externalize the dependencies of your components and manage them more effectively. However, sometimes you might encounter an "Unsatisfied Dependency" error, which can be a bit confusing, especially for beginners. In this tutorial, we'll delve into what an unsatisfied dependency is…
In Spring Boot applications, ApplicationContextException is an exception that occurs when there is an issue with the application context, preventing the application from starting or functioning correctly. This exception often points to problems with bean creation, initialization, or configuration within the Spring IoC container. In this tutorial, we'll explore the causes of ApplicationContextException, how…
When it comes to Java development, speed and efficiency are paramount. This is where Spring Boot Dev Tools comes into play, offering a set of handy utilities designed to enhance your development experience. Whether you're a seasoned developer or just starting with Spring Boot, these tools can significantly boost your productivity. In this article,…