转:
http://www.open-open.com/doc/view/fce32b1ba0cb4a88afb5523363a9ee9e
http://book.51cto.com/art/201309/412113.htm
http://book.51cto.com/art/201309/412114.htm
http://book.51cto.com/art/201309/412115.htm
http://book.51cto.com/art/201309/412116.htm
http://book.51cto.com/art/201309/412117.htm
