【Servlet源码】-Servlet Interface 、GenericSerlvet Abstract Class、HttpServlet Class
1、publicinterfaceServletDefinesmethodsthatallservletsmustimplement.AservletisasmallJavaprogramthatrunswithinaWebserver.ServletsreceiveandrespondtorequestsfromWebclients,usuallyacrossHTTP,theHyperTex