Maven – Spring Boot Fat/Uber Jar

Step 1 – Add Spring boot maven plugin in pom.xml

First step and probably only step required is to have spring-boot-maven-plugin plugin entry in your pom.xml file.

<build>     <plugins>         <plugin>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-maven-plugin</artifactId>         </plugin>     </plugins> </build>

Read More: Create fat jar using maven shade plugin

Step 2 – Run the maven build

Now when you run the maven build using simple command mvn clean install, it will generate the fat jar for your project consisting all compiled application code as well as all its dependencies – packaged inside one big jar file.

mvn clean install

Demo

You can download the sourcecode of Spring Boot REST API Example into your machine to run the demo. You can optionally import this project as maven project into eclipse, if you wish to look inside the project code.

Imported project structure

Spring boot application

Generated fat jar file

Generated maven fat jar file

Complete pom.xml file used in demo

pom.xml

<?xml version="1.0" encoding="UTF-8"?> <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 http://maven.apache.org/xsd/maven-4.0.0.xsd;     <modelVersion>4.0.0</modelVersion>       <groupId>com.howtodoinjava.demo</groupId>     <artifactId>springbootdemo</artifactId>     <version>0.0.1-SNAPSHOT</version>     <packaging>jar</packaging>       <name>SpringBootDemo</name>     <description>Spring Boot Demo for https://howtodoinjava.com</description>       <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>1.4.0.RELEASE</version>         <relativePath/> <!-- lookup parent from repository -->     </parent>       <properties>         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>         <java.version>1.8</java.version>     </properties>       <dependencies>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-data-jpa</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-hateoas</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-jersey</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-security</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>         <dependency>             <groupId>org.hsqldb</groupId>             <artifactId>hsqldb</artifactId>             <scope>runtime</scope>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-test</artifactId>             <scope>test</scope>         </dependency>     </dependencies>       <build>         <plugins>             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>             </plugin>         </plugins>     </build>   </project>