UML学习（二）-----类图

http://www.cnblogs.com/silent2012/archive/2011/09/07/2169946.html

http://www.cnblogs.com/yangfengming/archive/2008/08/14/1267495.html

http://www.cnblogs.com/huangxincheng/archive/2012/10/17/2728736.html

http://www.cnblogs.com/playing/archive/2011/04/16/2017870.html

http://www.cnblogs.com/huangxincheng/archive/2012/10/17/2728736.html

http://www.cnblogs.com/goodcandle/archive/2005/10/19/UMLstart.html

http://www.cnblogs.com/huangxincheng/archive/2012/10/17/2728736.html

http://www.cnblogs.com/naiking/archive/2012/01/17/2324679.html

http://www.cnblogs.com/ywqu/archive/2009/12/06/1618184.html

http://www.cnblogs.com/jqyp/archive/2010/09/01/1815027.html