conf/web.xml配置文件

<web.app...>
  <servlet>
    <init-patam>
      <param-name>data</param-name>
      <param-value>xxxxx</param-value>
    <init-param>
  </servlet>
</web.app>


servlet资源文件

public class ServletDemo extends HttpServlet{
  public void doGet{HttpServletRequest request, HttpServletResponse response}
  throws ServletException, IOException{
    String value = this.getServletConfig().getInitPatameter("data");
    //将得到 value=xxxxx
  }
}