Question

How to get Maven project basedir() from my Java code?

Answer 1

According to maven doc, there’s a maven property ${project.basedir}

If you include a properties file in your resources, which has the ${project.basedir} placeholder, and enable filtering for the resources plugin, you will find that there’s a build time substitution of the basedir into the properties file. You can then load this using a Properties instance in code.

in /src/main/resources, create a file called project.properties, containing

my.basedir=${project.basedir}

Then, in the POM, enable filtering for /src/main/resources, as outlined in the maven resources filtering documentation linked above.

Then, in code, at runtime, load the properties file into a Properties instance

Properties props = new Properties();
props.load(this.getClass().getResourceAsStream("project.properties"));
String myBasedir = props.get("my.basedir");

An alternative would be to process some source files and do substitution in there by hooking into the process-sources phase, but that’s not likely to be easy to explain.