Question

Hi I have a multimodule Maven project and i installed Java1.5 and Java1.6 in my Windows machine and Path set for Java1.6 in Environment variable(For Eclipse Juno).But i will want to run maven command with Java5 only.How can i set in Parent project pom to use Java5 only for compiling Java files .I added these lines in parent pom.xm file.

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.5.1</version>
                <configuration>
                    <compilerId>eclipse</compilerId>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

But i am getting error in chile project pom.xml file

Plugin execution not covered by lifecycle configuration:
org.apache.maven.plugins:maven-compiler-plugin:2.5.1:testCompile
(execution: default-testCompile, phase: test-compile)

Answer 1

Please use Plugin_Management instead of Plugins declaration this declaration need to inherit plugins configuration to child projects (http://maven.apache.org/pom.html#Plugin_Management)

in you case it will be looks in the following manner:

parent pom.xml

<build>
  <pluginManagement>
    <plugins>
      <plugin>
         <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>2.5.1</version>
          <configuration>
             <source>1.5</source>
             <target>1.5</target>
          </configuration>
       </plugin>
    </plugins>
   </pluginManagement>
</build>

child pom.xml

<build>
  <plugins>
    <plugin>
       <groupId>org.apache.maven.plugins</groupId>
       <artifactId>maven-compiler-plugin</artifactId>
    </plugin>
  </plugins>
</build>

Also it is possible to set the following properties in parent pom.xml

<properties>
   <maven.compiler.source>1.5</maven.compiler.source>
   <maven.compiler.target>1.5</maven.compiler.target>
</properties>