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‎docs/java/build-automation-with-maven/configuring-and-building-projects-with-maven.md

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Configuring and building projects with Maven involves setting up the project structure, defining dependencies, and specifying build settings in the `pom.xml` file. Here's a step-by-step guide on how to configure and build projects with Maven:
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### 1. Project Structure
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Ensure that your project follows the standard Maven project structure:
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```
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project-name
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├── src
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│ ├── main
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│ │ ├── java # Source code files
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│ │ └── resources # Non-Java resources
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│ └── test
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│ ├── java # Test source code files
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│ └── resources # Test resources
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└── pom.xml # Project Object Model (POM) file
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```
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### 2. Configure `pom.xml`
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Edit the `pom.xml` file to configure your project. Here's a basic `pom.xml` template:
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```xml
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
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http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.example</groupId>
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<artifactId>project-name</artifactId>
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<version>1.0.0</version>
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<packaging>jar</packaging>
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<properties>
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<!-- Define project properties -->
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</properties>
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<dependencies>
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<!-- Define project dependencies -->
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</dependencies>
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<build>
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<plugins>
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<!-- Define build plugins -->
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</plugins>
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</build>
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</project>
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```
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- **`groupId`**: Identifies your project uniquely across all projects.
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- **`artifactId`**: The name of the project.
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- **`version`**: The version of the project.
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- **`packaging`**: The type of packaging for the project (e.g., jar, war, pom).
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- **`dependencies`**: Define project dependencies here.
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- **`build`**: Configure build settings and plugins.
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### 3. Define Dependencies
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Add dependencies to the `<dependencies>` section of the `pom.xml` file. Specify the group id, artifact id, and version of each dependency.
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```xml
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<dependencies>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-core</artifactId>
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<version>5.3.8</version>
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</dependency>
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<!-- Add more dependencies here -->
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</dependencies>
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```
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### 4. Build the Project
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Execute Maven commands to build the project:
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- **Compile**: `mvn compile`
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- **Test**: `mvn test`
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- **Package**: `mvn package`
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- **Install**: `mvn install`
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- **Clean**: `mvn clean`
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### 5. Run Maven Goals
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Execute custom Maven goals or plugins configured in the `pom.xml` file.
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```bash
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mvn <goal>
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```
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### 6. Explore Maven Plugins
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Explore Maven plugins to automate various tasks in your project, such as code generation, code quality checks, and deployment.
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### Conclusion
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By following these steps, you can configure and build your projects with Maven effectively. Maven simplifies project management, dependency management, and build processes, making it a popular choice for Java projects.

‎docs/java/build-automation-with-maven/introduction-to-maven.md

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Building automation with Maven simplifies the process of managing and building Java projects. Maven provides a standardized way to define project structures, manage dependencies, and execute build tasks. Here's an introduction to building automation with Maven:
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### What is Building Automation?
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Building automation refers to the process of automating various tasks involved in building and managing software projects. These tasks include compiling source code, managing dependencies, running tests, packaging artifacts, and deploying applications.
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### Why Use Maven for Building Automation?
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1. **Standardization**: Maven follows conventions and standard project structures, making it easy for developers to understand and navigate projects.
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2. **Dependency Management**: Maven centralizes dependency management, allowing developers to declare project dependencies and automatically resolve and download them from remote repositories.
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3. **Build Lifecycle**: Maven defines a standard build lifecycle with predefined phases (e.g., compile, test, package) that can be executed using simple commands.
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4. **Plugin Ecosystem**: Maven provides a rich ecosystem of plugins to extend its functionality and automate various tasks, such as code generation, code quality checks, and deployment.
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### Key Concepts in Maven
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1. **Project Object Model (POM)**: Maven uses a Project Object Model (POM) file, `pom.xml`, to define project configurations, dependencies, and build settings.
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2. **Plugins**: Maven plugins provide additional goals to execute custom tasks during the build process. Plugins can be configured in the `pom.xml` file to automate various tasks.
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3. **Dependencies**: Maven manages project dependencies by resolving them from remote repositories and including them in the project's classpath.
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4. **Build Lifecycle**: Maven defines a standard build lifecycle consisting of phases such as compile, test, package, install, and deploy. Developers can execute these build phases using Maven commands (`mvn <phase>`).
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### Maven Build Lifecycle Phases
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- **Clean Lifecycle**: Cleans the project by removing compiled files and other artifacts.
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- **Default Lifecycle**: Builds and packages the project. It includes phases like compile, test, package, install, and deploy.
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- **Site Lifecycle**: Generates project documentation and reports.
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### Getting Started with Maven
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1. **Install Maven**: Download and install Maven from the official Apache Maven website.
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2. **Create a Maven Project**: Use the `mvn archetype:generate` command to generate a Maven project from a predefined archetype.
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3. **Edit `pom.xml`**: Modify the `pom.xml` file to define project configurations, dependencies, and build settings.
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4. **Execute Maven Commands**: Use Maven commands (`mvn <goal>`) to compile, test, package, and deploy your project.
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### Conclusion
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Maven simplifies building automation by providing a standardized and flexible framework for managing and building Java projects. By following Maven's conventions and best practices, developers can streamline the build process and improve project maintainability and scalability.

‎docs/java/build-automation-with-maven/managing-dependencies-and-plugins.md

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Managing dependencies and plugins is a crucial aspect of configuring and building projects with Maven. Here's how you can manage dependencies and plugins in your Maven project:
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### Managing Dependencies
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Maven manages project dependencies using the `<dependencies>` section of the `pom.xml` file. You can specify the dependencies your project requires, including their group id, artifact id, and version.
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```xml
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<dependencies>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-core</artifactId>
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<version>5.3.8</version>
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</dependency>
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<!-- Add more dependencies here -->
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</dependencies>
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```
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Maven resolves dependencies automatically by downloading them from remote repositories such as Maven Central Repository. You can also specify additional repositories if needed.
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```xml
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<repositories>
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<repository>
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<id>my-repo</id>
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<url>https://example.com/repo</url>
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</repository>
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</repositories>
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```
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### Managing Plugins
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Maven plugins extend Maven's functionality and allow you to automate various tasks in your project. You can configure plugins in the `<build>` section of the `pom.xml` file.
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```xml
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.1</version>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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<!-- Add more plugins here -->
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</plugins>
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</build>
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```
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### Dependency and Plugin Versions
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It's important to specify the versions of dependencies and plugins to ensure consistency and compatibility across builds. You can define versions as properties to avoid duplication and make it easier to manage them.
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```xml
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<properties>
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<spring.version>5.3.8</spring.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-core</artifactId>
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<version>${spring.version}</version>
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</dependency>
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</dependencies>
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```
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### Dependency Scope
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Maven supports different dependency scopes to control their visibility and usage during the build process. Common dependency scopes include `compile`, `test`, `runtime`, and `provided`.
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```xml
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<dependencies>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.13.2</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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```
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### Plugin Goals
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Plugins can define multiple goals that can be executed during the build process. You can specify the plugin goal to execute by using the `mvn <plugin>:<goal>` command.
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```bash
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mvn clean
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mvn compiler:compile
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mvn surefire:test
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```
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### Conclusion
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By effectively managing dependencies and plugins in your Maven project, you can ensure that your build process is efficient, reliable, and consistent. Maven's dependency management and plugin system simplify project configuration and automation, making it a popular choice for Java developers.

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