How to access parent pom properties in spring boot project - maven

Question

This is my spring boot 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>
<groupId>com.piggymetrics</groupId>
<artifactId>gateway</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>gateway</name>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zuul</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.cc.cmt.ccc</groupId>
<artifactId>cc.ccme</artifactId>
<version>${cc.cmt.version}</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-parent</artifactId>
<version>Brixton.M4</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<finalName>${project.name}</finalName>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</project>
I have a parent pom ,which contain one properties version ${cc.cmt.version} ,How could I access this ?

Answer 1

The problem you want to deal with has more to do with Maven itself than of Spring Boot. If my assumption is right, you're likely in following situation
ModuleA
ModuleB
ModuleC
where, as depicted, say, there're three Maven modules in your Spring Boot project. You'd like to inherit ModuleA in the pom.xml of ModuleB and both of them needs to have Spring Boot parent dependency.
Maven project's can't have multiple parents declared in one pom.xml. Having said that, the workaround here is to declare org.springframework.boot parent dependency at ModuleA first along with all other property values. Now, just declare ModuleA as parent in the pom.xml of ModuleBand ModuleB will be able to access all dependencies(Spring Boot+others) as well as properties declared in ModuleA's pom.xml.