http://www.ibm.com/developerworks/cn/java/j-lo-classloader/
http://www.ibm.com/developerworks/cn/java/j-jtp06197.html
http://suhuanzheng7784877.iteye.com/blog/1122131
http://www.cnblogs.com/wucg/archive/2010/09/21/1832192.html
http://miaoxiaodong78.blog.163.com/blog/static/18765136200722894020524/
http://miaoxiaodong78.blog.163.com/profile/
http://www.cnblogs.com/626498301/archive/2010/08/17/1801406.html
http://www.blogjava.net/shingo/archive/2009/03/31/263190.html
http://www.blogjava.net/mirenxiaoxiao/archive/2010/12/14/337765.html#340675
http://developer.51cto.com/col/1006/