ServletConfig获取Servlet的公共参数方法

web.xml配置：

 <servlet>
  	<servlet-name>AServlet</servlet-name>
  	<servlet-class>AServlet</servlet-class>
  	
  	<init-param>
  		<param-name>name</param-name>
  		<param-value>ycy</param-value>
  	</init-param>
  </servlet>

获取方式：

this.getServletConfig().getInitParameter("name");