*******求正则表达式*******

Question

目前正则：http://static.com/(\w+)/pic/post/thumb/(\w{2})/(\w{2})/(\w{28})_(\d+)x(\d+)\.(jpg|png|gif)能匹配:
http://static.com/city/pic/post/thumb/d1/7d/727b0358482f963bb3033c7cc449_120x90.jpg想改下正则,即能匹配上面的也能匹配下面的url，如何修改?
http://static.com/city/pic/post/thumb/d1/7d/727b0358482f963bb3033c7cc449_120x90_none.jpg

Answer 1

试一下把后面改成x(\d+)[^.]*\.(jpg|png|gif)

Answer 2

正则改成如下这样
http://static.com/(\w+)/pic/post/thumb/(\w{2})/(\w{2})/(\w{28})_(\d+)x(\d+)(_\w+)?\.(jpg|png|gif)

Answer 3

x(\d+)[^.]*\.(jpg|png|gif)和http://static.com/(\w+)/pic/post/thumb/(\w{2})/(\w{2})/(\w{28})_(\d+)x(\d+)(_\w+)?\.(jpg|png|gif)
都可以的