https://code.google.com/p/jpa-basics-tutorial/source/checkout
http://alextretyakov.blogspot.com/2013/07/jpa-many-to-many-mappings.html
https://code.google.com/p/jpa-basics-tutorial/source/checkout
http://alextretyakov.blogspot.com/2013/07/jpa-many-to-many-mappings.html
转载于:https://www.cnblogs.com/sos-blue/p/3514206.html