Multiple requests use the same Servlet

Method One:

Userservlet's Url-pattern:userservlet

Added: Userservlet?method=add
Enquiry: Userservlet?method=query
Delete: Userservlet?method=delete

We can get the value of the method request parameter, call the corresponding method based on the value of method

Method Two:

Userservlet's Url-pattern:*.do

Added: add.do
Enquiry: query.do
Delete: delete.do

We can get Servletpath first:/addcustomer. Do or/query.do, and then remove/and. Do get the method name to invoke

And then using reflection to call Servletpath corresponding method

Multiple requests use the same Servlet