How to create a Jar file from a Spring Boot Application using Maven

In this article, we will learn how to create a JAR file from a Spring Boot application using Maven.

Introduction

The spring-boot-maven-plugin allows packaging a Spring Boot application as a JAR/WAR file. It needs to be specified in the project  pom.xml along with the type of packaging (jar/war).

Project Creation and Setup

Step 1 – Let us use an existing project as a starting point. Clone the code from this Spring Boot Thymeleaf project.

Step 2 – Update the pom.xml to specify the packaging and the `spring-boot-maven-plugin` configuration. So the pom file should look as follows:

<project xmlns="http://maven.apache.org/POM/4.0.0"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">  <modelVersion>4.0.0</modelVersion>  <groupId>com.learnjava</groupId>  <artifactId>learnjava-springbootthymeleaf-demo</artifactId>  <version>0.0.1-SNAPSHOT</version>  <packaging>jar</packaging>  <parent>    <groupId>org.springframework.boot</groupId>    <artifactId>spring-boot-starter-parent</artifactId>    <version>2.1.2.RELEASE</version>  </parent>  <dependencies>    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter-web</artifactId>    </dependency>    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter-thymeleaf</artifactId>    </dependency>  </dependencies>  <build>    <plugins>      <plugin>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-maven-plugin</artifactId>      </plugin>    </plugins>  </build></project>

Creating the JAR File

Execute the following Maven command:

mvn clean package

This creates the JAR file in the target directory of your project.

 

Further Reading

Conclusion

So to summarize, the spring-boot-maven-plugin can be used to create a Jar file from a Spring Boot Application using Maven.

 

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