How to make single war file of Spring Boot multimodule project

Question

my main root pom and also web module pom and model module pom is there so How to make single war file instead of multiple war file of each module.Or any ather way to make war file from these jars generated and war file contain application.properties and WEB-INF and META-INF folder with lib folder

Main 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>pom</packaging>
    <modules>
        <module>web</module>
        <module>model</module>
    </modules>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.codemaster</groupId>
    <artifactId>college-management-system</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>college-management-system</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>13</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-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>



</project>

web module 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">
    <parent>
        <artifactId>college-management-system</artifactId>
        <groupId>com.codemaster</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>web</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <dependency>
            <groupId>com.codemaster</groupId>
            <artifactId>model</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

</project>

model module 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">
    <parent>
        <artifactId>college-management-system</artifactId>
        <groupId>com.codemaster</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>model</artifactId>
    <packaging>jar</packaging>

</project>

so how to make only single war file instead of multiple war files of each module

Answer 1

Your multi-module project structure and POM should be like this

Parent - pom.xml -> Packaging pom

Module1 - pom.xml -> Packaging jar

Module2 - pom.xml -> Packaging jar

Web - pom.xml -> Packaging war

Parent POM

<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>
  <parent>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-parent</artifactId>
   <version>2.2.0.RELEASE</version>
   <relativePath /> <!-- lookup parent from repository -->
  </parent>
  <groupId>com.example</groupId>
  <artifactId>application-base</artifactId>
  <version>1.0.0</version>
  <packaging>pom</packaging>
  <properties>
    <java.version>1.8</java.version>
  </properties>
  <modules>
   <module>module1</module>
   <module>module2</module>
   <module>web</module>
  </modules>
  <dependencies>
            ----
  </dependencies>
</project>

Module POM

<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>
    <parent>
     <groupId>com.example</groupId>
     <artifactId>application-base</artifactId>
     <version>1.0.0</version>
    </parent>
     <packaging>jar</packaging>
     <artifactId>module</artifactId>
     <name>Module</name>
     <description>/description>
    <dependencies>
      ------
    </dependencies>
</project>

Web POM

<?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>
   <parent>
   <groupId>com.example</groupId>
   <artifactId>application-base</artifactId>
   <version>1.0.0</version>
   </parent>
   <artifactId>web</artifactId>
   <name>web</name>
   <packaging>war</packaging>
   <description></description>
   <dependencies>
    <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
     <groupId>com.example</groupId>
     <artifactId>module</artifactId>
     <version>1.0.0</version>
    </dependency>
   </dependencies>
   <build>
    <plugins>   
    </plugins>
   </build>
</project>