On the Day 3 of Springboot, I learned till now about 'src/main/java' this directory is where you put Java source code files. It is the primary location for writing your application business logic and implementing classes, interfaces, and other Java code specific to your project.
It is part of the project structure defined by Maven and is commonly used in many Java projects.
'src/main/resources': This directory is meant for storing non-Java resources that your application may need, such as configuration files, static files, templates, and property files. These resources are typically accessed by your Java code during runtime.
In the src/main/java directory, you would typically organize your Java code into packages according to your project's structure and requirements. It's a good practice to follow a package-by-feature or package-by-layer approach to keep your codebase organized and maintainable.
For example, you might have packages like com.example.myapp.controllers for your web controllers, com.example.myapp.services for your business services, and com.example.myapp.repositories for data access components.
By placing your Java source code files in the src/main/java directory, Spring Boot's build tools, such as Maven or Gradle, will automatically compile these source files, package them into an executable JAR or WAR file, and include them in the final artifact of your application.
In a Spring Boot project, the src/test/java directory is where you place your Java source code files for testing your application. It is a standard directory used for writing unit tests, integration tests, and other types of tests in Java projects, including those built with Spring Boot.
In simpler terms, the JRE (Java Runtime Environment) system library in Spring Boot refers to the essential components that allow your Spring Boot application to run. It includes the necessary tools and libraries provided by Java to execute your application's code.
Think of the JRE system library as the "engine" that powers your Spring Boot application. It contains all the fundamental building blocks, like classes and methods, that enable your application to perform common tasks such as reading files, connecting to databases, handling network communication, and more.
When you develop a Spring Boot application, you don't need to worry about creating these building blocks from scratch. The JRE system library already provides them for you. It's like having a toolbox with all the necessary tools at your disposal.
In simpler terms, the JRE system library in Spring Boot ensures that your application can run on any system that has Java installed. It takes care of the behind-the-scenes work so that you can focus on writing the unique code that makes your Spring Boot application special.
In Spring Boot, Maven dependencies refer to the external libraries and frameworks that your project relies on. Maven is a build automation and dependency management tool that helps manage these dependencies effectively.
When you develop a Spring Boot application, you often need to use third-party libraries and frameworks to add additional functionality to your project. These libraries could include database connectors, web frameworks, security modules, logging utilities, and more. Maven simplifies the process of managing these dependencies by automatically downloading and including them in your project.
In a Spring Boot project, the pom.xml file is an XML configuration file used by Maven (a build automation and dependency management tool) to define the project's settings, dependencies, and build instructions. The pom.xml file stands for "Project Object Model" and serves as the backbone of the Maven project.
The pom.xml file is typically located in the root directory of the Spring Boot project. It contains various elements that define the project's metadata, such as its group ID, artifact ID, version, and packaging type. Here's a breakdown of some key elements commonly found in a pom.xml file: