My engineering practice subject to "recipe search engines." Goal by crawling all types of recipe information on the Internet, after processing into the database, provided in the form of Web pages to a user query recipe you want.
1, extraction Abstract use case
Based Web Application management and access to two angles, can be divided into the site and users User management Administrator
2, with the embodiment of FIG.
3、High Level use case
For administrators, the main use cases are:
(1) Reptile management: According to the corresponding Web page structural changes, modifications reptiles crawling way, according to business needs and run a new task reptiles
(2) Database management: the background check database changes, additions or deletions
For the user, the main use cases:
(1) search for recipes based on ingredients Name
(2) according to the recipe name, recipe search
4、Expanded use case分析
Reptile only when the corresponding site to monitor the new content will add new records to the database, are under certain conditions, the expanded use case