To include the JDatePicker dependency in your project via maven you need to add the following dependency declaration in your project’s pom:
<dependency><groupId>net.sourceforge.jdatepicker</groupId><artifactId>jdatepicker</artifactId><version>1.3.2</version></dependency>
This will only work up to version 1.3.2. Later releases are not yet in the maven central repo. They can be downloaded from the sourceforge released files (http://sourceforge.net/projects/jdatepicker/files/Releases).
You may also get source versions of the project by checking out the specific tag you are interested in (see http://jdatepicker.svn.sourceforge.net/viewvc/jdatepicker/tags or http://sourceforge.net/scm/?type=svn&group_id=107962).
JDatePicker 
JDatePicker is excellent to use. But wuld like ask the team, how can I change the calendar image
Do you want to put an image on the calendar button? At the moment it is only displaying “…”, you cannot change this without rebuilding the library. You can make your own custom build, I suggest you check out the tag for the version you are using and adding an image to the button.