http://tanlan.iteye.com/blog/426121
http://blog.csdn.net/zhchzh1000/article/details/4484602
http://blog.csdn.net/airobot008/article/category/643511
http://docs.oracle.com/javase/1.5.0/docs/guide/management/agent.html#sysprops
http://blog.csdn.net/diy8187/article/details/4369129
http://www.blogjava.net/xmatthew/articles/185673.html