Extraction approach of hypertext information based on regular expression

Hypertext is the most popular file format on the Internet, which has simple formal standard, and has the feature of non-continuity. This paper studies how to extract information from hypertext by regular expression, gives results of how to extracting weather information from the weather forecasting pages of sohu, sina and tencent. This paper gives the feasible extraction approach of hyper text, which is very useful in Chinese Information Processing and the research-base of the research engine.