This app is used to show how to connect mongodb in play 2.0 framework via morphia. PS:Please inspect these three files, app/models/Group.java, app/controllers/Application.java project/Build.scala One more thing, after download the source code, do remember add the mongodb-java-driver and morphia jar files into project class path. after the Build.scala has loaded, morphia jar file at {play2-home-dir}/repository/cache/com.google.code.morphia/morphia/jars mongo-java-driver jar file at {play2-home-dir}/repository/cache/org.mongodb/mongo-java-driver/jars