I. Web.xml, each element item related configuration order (Refer to Web.xml corresponding DTD document) "Web-app" Match: Icon?, Display-Name?, Description?, Distributable?, Context-param *, Filter *, FILTER-MAPPING *, LISTENER *, servlet *, servlet-mapping *, session-config?, mime-maping *, welcome-file-list?, error-page *, taglib *, resource-env-ref * , resource-ref *, security-constraint *, login-config?, security-role *, env-entry *, ejb-ref *, ejb-local-ref *
(Where:? Indicates that can match 0 or 1 time, * indicates that can match 0 times or multiple times)
