Maven多模块项目：我可以依赖吗？

Question

I have a maven project, with a main project A and modules B and C. The children inherit from A's pom.

A
|
|----B
|    |----pom.xml
|
|----C
|    |----pom.xml
| 
|----pom.xml

It already builds jars for all the modules. Is there a way to include the dependencies in those jars? Eg so I get B-1.0-with-dependencies.jar and C-1.0-with-dependencies.jar ? I have tried setting

<plugin>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>2.6</version>
    <configuration>
        <descriptorRefs>
            <descriptorRef>jar-with-dependencies</descriptorRef>
        </descriptorRefs>
    </configuration>
</plugin>

In the parent pom, but it doesn't seem to do anything: the build succeeds, but I get regular, no-dependency jars.

I'd like to avoid putting something in each child pom, as in reality I have more than 2 modules. I'm sure there is some way to do this, but can't seem to work it out from the maven docs. Thanks!

Answer 1

This is how I made it work.
In the aggregator/parent pom I configured:

<properties>
    <skip.assembly>true</skip.assembly>
</properties>

<build>
    <plugins>
        <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <version>2.6</version>
            <configuration>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
                <skipAssembly>${skip.assembly}</skipAssembly>
            </configuration>
            <executions>
                <execution>
                    <id>make-assembly</id>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

Note the skip.assembly property, which is set by default to true . That means the assembly would not be executed on the parent, which makes sense since the parent doesn't provide any code (having packaging pom ).

Then, in each module I configured simply the following:

<properties>
    <skip.assembly>false</skip.assembly>
</properties>

Which means in each submodule the skip is disabled and the assembly is executed as configured in the parent. Moreover, with such a configuration, you can also easily skip the assembly for a certain module (if required).

Please also note the assembly configuration on the parent, I added an execution on top of the configuration you provided so that the assembly plugin is triggered automatically when invoking mvn clean package (or mvn clean install ).