[java] Maven – Always download sources and javadocs

In my case the "settings.xml" solution didn't work so I use this command in order to download all the sources:

mvn dependency:sources

You also can use it with other maven commands, for example:

mvn clean install dependency:sources -Dmaven.test.skip=true

To download all documentation, use the following command:

mvn dependency:resolve -Dclassifier=javadoc