标签：
http://www.blogjava.net/Green-nut/articles/332202.html
http://www.buildapp.net/Java/show.asp?id=20280
http://weixiaolu.iteye.com/blog/1479656
http://blog.csdn.net/whycold/article/details/6153865
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原文地址：http://www.cnblogs.com/softidea/p/4403101.html
