使用部署描述符指定的WAR文件的部署顺序

<web-app>
  <display-name>MyWebApp</display-name>
  
  <servlet>
    <servlet-name>Servlet1</servlet-name>
    <servlet-class>com.example.Servlet1</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  
  <servlet>
    <servlet-name>Servlet2</servlet-name>
    <servlet-class>com.example.Servlet2</servlet-class>
    <load-on-startup>2</load-on-startup>
  </servlet>
  
  <servlet>
    <servlet-name>Servlet3</servlet-name>
    <servlet-class>com.example.Servlet3</servlet-class>
    <load-on-startup>3</load-on-startup>
  </servlet>
  
  <!-- 其他配置 -->
  
</web-app>