转载一:http://blog.csdn.net/bripengandre/article/details/2192982
转载二:http://blog.csdn.net/flfna/article/details/5048290
转载三:http://www.cnblogs.com/dusthunter/archive/2013/02/03/2890678.html
转载四:http://publish.it168.com/2005/0923/20050923001901.shtml
转载五:http://cabinet1.blog.sohu.com/107318807.html