将Maven POM版本号加载到Java Project中

Question

I want to add a version numbering to my Java application (in this case a Vaadin Portlet) which features the Version number in the help view.

The thing is that that version number is the one defined in the my Maven's POM file (for example 1.1.5-SNAPSHOT) and that is the one we are going to change (at release for example).

Any idea on how to get it out of the POM and into (for example, a String) in Java? (If this is at all possible)

Thanks

Answer 1

Use a filtered properties file containing the line

version=${project.version}

and load this properties file from the classpath in your Java program.

Answer 2

There are many solutions to this problem

• Have maven write the version number in MANIFEST.MF during packaging phase
• Create a filtered properties file, like JB mentionned
• Have one Java class rewritten with that property

But I would defintely prefer the first, as accessing MANIFEST.MF is quite easy in Java

Answer 3

The version in the POM is available as a property "project.version". Expressed as ${project.version}

So you should be able to use it with filtering resources:

http://maven.apache.org/plugins/maven-resources-plugin/examples/filter.html

The nicest approach would probably be to filter (and replace) a properties file or a deployment descriptor.

Answer 4

Or you could read the maven pom.properties from classpath. The pom.properties are located at:
META-INF/maven/groupid/artifactId/pom.properties