Spring Fundamentals

Get started with the Spring Framework by exploring posts that explain its most important components and how they work together.

The Spring Framework is like a toolbox for Java developers, designed to make building applications easier and more efficient. It offers a collection of tools, libraries, and features that help developers manage complex tasks, such as connecting to databases, handling security, and coordinating the interactions between different parts of an application.

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The Spring Context, or Application Context, serves as a storage area in your application’s memory where Spring manages the objects you need, called beans. A bean is simply an object that Spring creates and controls on your behalf. By allowing Spring to manage your beans, you benefit from useful features like dependency injection, loose coupling, and aspect-oriented programming (AOP). These features make your application more flexible, maintainable, and modular.

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When you start building applications with the Spring Framework, one important concept you’ll encounter is wiring beans. But what exactly does that mean? Simply put, wiring beans is all about how different objects in your application connect and work together.

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In software development, using interfaces is a powerful way to define how different parts of your application work together. This guide will explain how to use interfaces to decouple implementations, along with the roles of services, repositories, controllers, and models in the Spring framework. Decoupling means keeping parts of the application separate so they don’t depend too much on each other, making it easier to change one part without affecting the others. We’ll also explore how to manage these Spring components using dependency injection.

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When working with Spring, you’ll come across different ways to manage the lifecycle of beans. Simply put, a bean is an object that Spring manages for you, and its scope controls how long that object exists and how many instances of it get created while your application is running. In other words, the bean scope is how we manage the life cycle of a bean. Understanding bean scopes is important because they affect how your application’s resources are used. The two most common scopes in Spring are Singleton and Prototype.

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Aspect-Oriented Programming (AOP) is a useful approach in software development that helps manage common tasks, known as cross-cutting concerns, that appear across different parts of an application. Cross-cutting concerns include things like logging, security, error handling, and transaction management. When these tasks get mixed in with the main business logic, they can make your code more complicated and harder to understand. AOP helps keep these concerns separate, leading to a cleaner and more organized codebase.

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In today’s digital world, web applications play a vital role in how we interact online. This post explores how to create a basic web application using Spring Boot and Spring MVC, helping you understand the architecture, HTTP request handling, and the advantages Spring offers for building robust applications.

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REST, or Representational State Transfer, is a way for applications to communicate over the internet using standard HTTP methods like GET, POST, PUT, and DELETE. It allows clients, such as web or mobile apps, and backend services to interact with server resources, which typically consist of data. Each request contains all the information needed for the server to respond, making it stateless and efficient.

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When building a Spring Boot app, connecting to a database is often essential. JdbcTemplate and Spring Data are effective options for managing database interactions. JdbcTemplate is a lower-level tool for relational databases, allowing you to write SQL queries directly in Java and requiring a DataSource that Spring Boot can configure automatically.

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When working with databases in Spring applications, it is essential to ensure operations are consistent and reliable. That is where transactions come in. This post explores what transactions are, how they work in Spring, and how to use the @Transactional annotation to manage transactions effectively.

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Testing is crucial in building reliable software. It helps you catch issues early, ensures your application works as expected, and gives you confidence as you make changes. In this guide, we’ll explore two fundamental types of testing in a Spring Boot app: unit tests and integration tests. We will also walk through the essentials, including libraries and annotations, to help you succeed.

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