redirecting to a common page

Question

i want to redirect all request to common page and on that common page i want to check whether this url exists or not.

for example my base URL is www.iCare.com

when any one want to access his clinic page eg(www.icare.com/myclinic) the url is redircted to a common page and at that page i get the current url and matches it with DB that this URL exists or not.

Answer 1

Filter （不是普通页面）是您要寻找的

Answer 2

Servlet filter is a better option. With servlet filter you need not redirect.