Pass value: Web. XML passes the parameter to get the value in the Web. XML in the servlet

1 Transfer value: Web. XML Pass Parameter2 3 Configuring multiple Init-param in a servlet in Web. XML4 <servlet>5   ...6   <Init-param>7     <Param-name>Name</Param-name>8     <Param-value>Guan yu</Param-value>9   </Init-param>Ten   <Init-param> One     <Param-name>Age</Param-name> A     <Param-value>20</Param-value> -   </Init-param> -   <Init-param> the     <Param-name>Sex</Param-name> -     <Param-value>Man</Param-value> -   </Init-param> - </servlet> +  - In the init () method of the servlet: + String name=this.getservletconfig (). Getinitparameter ("name"); A String age=this.getservletconfig (). Getinitparameter ("Age"); at  -  - servletconfig sc=this.getservletconfig ();
//Enumeration gets all configuration parameter information  - enumeration E=sc.getservletconfig (). Getinitparameternames (); - While (E.hasmoreelements ()) { - Syso (Sc.getinitparameter (E.nextelement (). toString ())); in } -  to  + ----------------------------------- - Configuring multiple Context-param under Web-app in Web. XML the <Context-param> *    <Param-name></Param-name> $    <Param-value></Param-value>Panax Notoginseng </Context-param> -  the <Context-param> +    <Param-name></Param-name> A    <Param-value></Param-value> the </Context-param> +  -  $ Context: General refers to contextual environment $  - ServletContext: Refers to the context of the entire Web project, which represents the entire XML -  the This.getservletcontext (). Getinitparameter ("Age"); - //Can be partially obtained by the whole (child to parent)Wuyi this.getservletconfig (). Getservletcontext (). Getinitparameter ("Age"); the  - Servletconfig,servletcontext can get these two objects directly from this (Servlet)
 Wu servletconfig scf=this.getservletconfig (); - ServletContext sct=this.getservletcontext (); About  $ Init ( ), init (servletconfig config): in Genericservlet, init (servletconfig config) is called init (), so the overlay is init (), Instead of init (servletconfig config) 

Pass value: Web. XML passes the parameter to get the value in the Web. XML in the servlet