数据同步

http://www.52rs.net/ArticleView.aspx?gID=71bd9b1d-ad30-4f6e-896d-fed7dfbc1b3d

http://han.guokai.blog.163.com/blog/static/1367182712010520104923272/

http://tech.ccidnet.com/art/3737/20050707/463483_1.html

http://www.blogjava.net/sitinspring/archive/2008/09/01/226040.html

http://www.cnblogs.com/zhiranok/p/id_generator.html

http://hi.baidu.com/qq282624307/item/dd47807cc7108e2a6e29f6db