在 maven 中将文件从一个项目复制到另一个项目

Question

I'm working on a multi-module project. We're using the appCtx.xml from one module in few other modules.

Current issue is that they're not always in sync with each other.

It happens when someone modifies the file and the project builds, the person doing that can forget to copy to another module and it causes issues.

How do I copy appCtx.xml inside src/main/resources from project A to src/main/resources in project B?

Answer 1

You can do this with the maven resources plugin: copy-resources , something like:

<plugin>
    <artifactId>maven-resources-plugin</artifactId>
    <executions>
        <execution>
            <id>copy-appCtx</id>
            <phase>generate-resources</phase>
            <goals>
                <goal>copy-resources</goal>
            </goals>
            <configuration>
                <outputDirectory>${project.build.directory}/src/blahhere</outputDirectory>
                <overwrite>true</overwrite>
                <resources>
                    <resource>
                        <directory>../other_project/src/blah/blah</directory>
                        <includes>
                            <include>appCtx.xml</include>
                        </includes>
                    </resource>
                </resources>
            </configuration>
        </execution>
    </executions>
</plugin>

This copies a file from one project (colocated on the same source tree) as part of the generate-resources phase. You can adapt this to your needs.

This copying from one project to another may cause unstable builds if the projects aren't all built at once, but the above will work for projects which are always built together.

Answer 2

Another, perhaps more updated way, is to use maven-dependency-plugin with unpack goal and fileMappers to rename the destination of the unpacked files.

This official documentation with an example helped me a lot: https://maven.apache.org/plugins/maven-dependency-plugin/examples/unpacking-filemapper.html