UML学习（二）-----类图

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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

UML学习（二）-----类图

原文：http://www.cnblogs.com/chengjun/p/5380805.html