Maven reuse properties from Super POM
Question
I want to use the properties defined in the Super POM:
<properties>
<jcl-over-slf4j.version>1.7.5</jcl-over-slf4j.version>
<jdk.version>1.7</jdk.version>
<jstl.version>1.2</jstl.version>
<junit.version>4.11</junit.version>
<logback.version>1.0.13</logback.version>
<spring.version>4.1.1.RELEASE</spring.version>
</properties>
In the POM.xml file of my project:
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
But I get the following error:
[ERROR] 'dependencies.dependency.version' for org.springframework:spring-core:jar must be a valid version but is '${spring.version}'. @ line 22, column 16
Then I have to add the same properties to the POM.xml of my project to make it work. Is there another way to do this, it seems really inefficient to do this. By the way I am new to maven.
Super POM:
<!-- ====================================================================== -->
<!-- -->
<!-- Generated on 2015-09-04T05:07:36 -->
<!-- -->
<!-- ====================================================================== -->
<!-- ====================================================================== -->
<!-- -->
<!-- Effective POM for project -->
<!-- 'com.mycompany.webapp:web-app:war:1.0-SNAPSHOT' -->
<!-- -->
<!-- ====================================================================== -->
<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.mycompany.webapp</groupId>
<artifactId>web-app</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>web-app Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<jcl-over-slf4j.version>1.7.5</jcl-over-slf4j.version>
<jdk.version>1.7</jdk.version>
<jstl.version>1.2</jstl.version>
<junit.version>4.11</junit.version>
<logback.version>1.0.13</logback.version>
<spring.version>4.1.1.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.1.1.RELEASE</version>
<scope>compile</scope>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.5</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.0.13</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.1.RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.1.RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
<scope>compile</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<snapshots>
<enabled>false</enabled>
</snapshots>
<id>central</id>
<name>Central Repository</name>
<url>http://repo.maven.apache.org/maven2</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<releases>
<updatePolicy>never</updatePolicy>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
<id>central</id>
<name>Central Repository</name>
<url>http://repo.maven.apache.org/maven2</url>
</pluginRepository>
</pluginRepositories>
<build>
<sourceDirectory>/Users/marcelo/Documents/MavenTest/web-app/src/main/java</sourceDirectory>
<scriptSourceDirectory>/Users/marcelo/Documents/MavenTest/web-app/src/main/scripts</scriptSourceDirectory>
<testSourceDirectory>/Users/marcelo/Documents/MavenTest/web-app/src/test/java</testSourceDirectory>
<outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/classes</outputDirectory>
<testOutputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/test-classes</testOutputDirectory>
<resources>
<resource>
<directory>/Users/marcelo/Documents/MavenTest/web-app/src/main/resources</directory>
</resource>
</resources>
<testResources>
<testResource>
<directory>/Users/marcelo/Documents/MavenTest/web-app/src/test/resources</directory>
</testResource>
</testResources>
<directory>/Users/marcelo/Documents/MavenTest/web-app/target</directory>
<finalName>web-app</finalName>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.3</version>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2-beta-5</version>
</plugin>
<plugin>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.1</version>
</plugin>
<plugin>
<artifactId>maven-release-plugin</artifactId>
<version>2.0</version>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>2.4.1</version>
<executions>
<execution>
<id>default-clean</id>
<phase>clean</phase>
<goals>
<goal>clean</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.3.1</version>
<executions>
<execution>
<id>default-install</id>
<phase>install</phase>
<goals>
<goal>install</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>2.5</version>
<executions>
<execution>
<id>default-resources</id>
<phase>process-resources</phase>
<goals>
<goal>resources</goal>
</goals>
</execution>
<execution>
<id>default-testResources</id>
<phase>process-test-resources</phase>
<goals>
<goal>testResources</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.10</version>
<executions>
<execution>
<id>default-test</id>
<phase>test</phase>
<goals>
<goal>test</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<executions>
<execution>
<id>default-testCompile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
<execution>
<id>default-compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<executions>
<execution>
<id>default-war</id>
<phase>package</phase>
<goals>
<goal>war</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.7</version>
<executions>
<execution>
<id>default-deploy</id>
<phase>deploy</phase>
<goals>
<goal>deploy</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.0</version>
<executions>
<execution>
<id>default-site</id>
<phase>site</phase>
<goals>
<goal>site</goal>
</goals>
<configuration>
<outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</execution>
<execution>
<id>default-deploy</id>
<phase>site-deploy</phase>
<goals>
<goal>deploy</goal>
</goals>
<configuration>
<outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</execution>
</executions>
<configuration>
<outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</plugin>
</plugins>
</build>
<reporting>
<outputDirectory>/Users/marcelo/Documents/MavenTest/web-app/target/site</outputDirectory>
</reporting>
</project>
POM.xml
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany.webapp</groupId>
<artifactId>web-app</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>web-app Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<jcl-over-slf4j.version>1.7.5</jcl-over-slf4j.version>
<jdk.version>1.7</jdk.version>
<jstl.version>1.2</jstl.version>
<junit.version>4.11</junit.version>
<logback.version>1.0.13</logback.version>
<spring.version>4.1.1.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- Spring Core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${jcl-over-slf4j.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- jstl -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
</dependencies>
<build>
<finalName>web-app</finalName>
</build>
</project>
2 answers
solution1
1 2015-09-04 15:18:15
What you are calling effective POM sounds like a parent POM.
Your POM needs this
<parent>
<groupId>com.mycompany.webapp</groupId>
<artifactId>web-app</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
solution2
1 ACCPTED 2015-09-07 08:05:48
In order to use properties from a parent pom your child project must extend from parent. But in order to extend, your parent pom packaging must be pom instead of war . IMHO, it would be best if you create a real parent pom and put all the properties there and than extend other two web app from that project.
Here is an example;
Parent 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.mycompany.webapp</groupId>
<artifactId>parent-pom</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<name>parent-pom</name>
<properties>
<jcl-over-slf4j.version>1.7.5</jcl-over-slf4j.version>
<jdk.version>1.7</jdk.version>
<jstl.version>1.2</jstl.version>
<junit.version>4.11</junit.version>
<logback.version>1.0.13</logback.version>
<spring.version>4.1.1.RELEASE</spring.version>
</properties>
<modules>
<module>web-app-1</module>
<module>web-app-2</module>
</modules>
</project>
Than on your different projects (for example I will use web-app-1 and web-app-2 )
<?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>
<groupId>com.mycompany.webapp</groupId>
<artifactId>parent-pom</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany.webapp</groupId>
<artifactId>web-app-1</artifactId>
<packaging>war</packaging>
...
</project>
And
<?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>
<groupId>com.mycompany.webapp</groupId>
<artifactId>parent-pom</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany.webapp</groupId>
<artifactId>web-app-2</artifactId>
<packaging>war</packaging>
...
</project>
And your project structure will be
project-root
-- pom.xml (this is parent pom)
-- web-app-1
---- pom.xml
-- web-app-2
---- pom.xml
If you have a local maven repository ( nexus , artifactory etc) you can even release parent pom and sub module differently.
And if you want to override a property simply redefine it in your sub projects (web-app-1 and web-app-2)
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