What is the method for packaging multiple modules in Spring Boot?

Spring Boot supports packaging multi-module projects, it can be achieved using either Maven or Gradle build tools. Below are the steps to package a multi-module project using Maven.

1. Configure module information in the pom.xml file of the parent project, such as:

<modules>
    <module>module1</module>
    <module>module2</module>
    ...
</modules>

1. Configure dependencies and plugins in the pom.xml files of each submodule, for example:

<parent>
    <groupId>com.example</groupId>
    <artifactId>parent</artifactId>
    <version>1.0</version>
</parent>

1. Configure the packaging plugin in the parent project’s pom.xml file, for example:

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

1. Configure the packaging method in the pom.xml files of each submodule, for example:

<build>
    <finalName>module1</finalName>
</build>

1. Run the following Maven command in the root directory of the parent project to package it:

mvn clean package

After the packaging is completed, you can find the generated executable JAR files in the target directory of each sub-module.