A simple guide to learn how to import Jar packages using Maven

Maven Quick Tutorial: Concise steps to teach you to import Jar packages

Maven is a powerful project management tool that can help developers automatically build and manage projects. One of the important functions is to manage the external Jar packages that the project depends on. During the development process, we often need to introduce third-party Jar packages to implement certain functions. This article will introduce how to quickly import Jar packages through Maven, and attach specific code examples.

Step 1: Create a Maven project

First, create a new Maven project in your development environment. You can use IDE tools (such as Eclipse, IntelliJ IDEA, etc.) to create projects, or you can create them manually through Maven commands. The following is an example of creating a new project through the Maven command:

mvn archetype:generate -DgroupId=com.example -DartifactId=my-project -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

Step 2: Edit the pom.xml file

In a Maven project, all project configuration information is saved in pom.xml in the file. To import an external Jar package, you need to add the corresponding dependencies in the pom.xml file. Add the required Jar package dependencies in the dependencies tag, as shown below:

<dependencies>
    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>30.1-jre</version>
    </dependency>
</dependencies>

In the above code example, we added a dependency on the Google Guava library. You can modify parameters such as groupId, artifactId, and version to import other Jar packages according to actual needs.

Step 3: Update the Maven project

After editing the pom.xml file, you need to execute Maven’s mvn clean install command to update the project and download the dependent Jar package . Execute the following command in the project root directory:

mvn clean install

Maven will automatically download the required Jar package and save it to the local warehouse.

Step 4: Write code

Finally, you can write code in the project and introduce dependent Jar packages. The following is a simple sample code:

import com.google.common.collect.Lists;

import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> list = Lists.newArrayList("apple", "banana", "orange");
        for (String fruit : list) {
            System.out.println(fruit);
        }
    }
}

In the above code, we use the List tool class provided by the Google Guava library to create a list containing fruit names, and traverse to output the name of each fruit.

Through the above four simple steps, you can quickly use Maven to import the Jar package and start using the functions of third-party libraries in your project. Hope this article is helpful to you!

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