图书管理系统配置的load-on-startup无效，但是菜品管理系统是正常的，什么原因？

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns="http://xmlns.jcp.org/xml/ns/javaee"

xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

id="WebApp_ID" version="3.1">

<display-name>shenjw_library</display-name>

<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list>

<servlet>

<description></description>

<display-name>InitServlet</display-name>

<servlet-name>InitServlet</servlet-name>

<servlet-class>com.shenjw.servlet.InitServlet</servlet-class>

<load-on-startup>2</load-on-startup>

</servlet>

<servlet-mapping>

<servlet-name>InitServlet</servlet-name>

<url-pattern>/InitServlet</url-pattern>

</servlet-mapping>

<servlet>

<display-name>LoginServlet</display-name>

<servlet-name>LoginServlet</servlet-name>

<servlet-class>com.shenjw.servlet.LoginServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>LoginServlet</servlet-name>

<url-pattern>/LoginServlet</url-pattern>

</servlet-mapping>

<servlet>

<display-name>RegistServlet</display-name>

<servlet-name>RegistServlet</servlet-name>

<servlet-class>com.shenjw.servlet.RegistServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>RegistServlet</servlet-name>

<url-pattern>/RegistServlet</url-pattern>

</servlet-mapping>

<servlet>

<display-name>CategoryServlet</display-name>

<servlet-name>CategoryServlet</servlet-name>

<servlet-class>com.shenjw.servlet.CategoryServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>CategoryServlet</servlet-name>

<url-pattern>/CategoryServlet</url-pattern>

</servlet-mapping>

<servlet>

<display-name>AddBookServlet</display-name>

<servlet-name>AddBookServlet</servlet-name>

<servlet-class>com.shenjw.servlet.AddBookServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>AddBookServlet</servlet-name>

<url-pattern>/AddBookServlet</url-pattern>

</servlet-mapping>

<servlet>

<display-name>SelectBookServlet</display-name>

<servlet-name>SelectBookServlet</servlet-name>

<servlet-class>com.shenjw.servlet.SelectBookServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>SelectBookServlet</servlet-name>

<url-pattern>/SelectBookServlet</url-pattern>

</servlet-mapping>

<filter>

<filter-name>EncodeFilter</filter-name>

<filter-class>com.shenjw.filter.EncodeFilter</filter-class>

<init-param>

<param-name>charset</param-name>

<param-value>UTF-8</param-value>

</init-param>

</filter>

<filter-mapping>

<filter-name>EncodeFilter</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<filter>

<filter-name>AuthFilter</filter-name>

<filter-class>com.shenjw.filter.AuthFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>AuthFilter</filter-name>

<url-pattern>/server.jsp</url-pattern>

</filter-mapping>

</web-app>

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">

  <display-name>shenjw_food</display-name>

  <welcome-file-list>

    <welcome-file>index.html</welcome-file>

    <welcome-file>index.htm</welcome-file>

    <welcome-file>index.jsp</welcome-file>

    <welcome-file>default.html</welcome-file>

    <welcome-file>default.htm</welcome-file>

    <welcome-file>default.jsp</welcome-file>

  </welcome-file-list>

  <servlet>

    <description></description>

    <display-name>InitServlet</display-name>

    <servlet-name>InitServlet</servlet-name>

    <servlet-class>com.shenjw.servlet.InitServlet</servlet-class>

    <load-on-startup>2</load-on-startup>

  </servlet>

  <servlet-mapping>

    <servlet-name>InitServlet</servlet-name>

    <url-pattern>/InitServlet</url-pattern>

  </servlet-mapping>

  <servlet>

    <description></description>

    <display-name>FoodAddServlet</display-name>

    <servlet-name>FoodAddServlet</servlet-name>

    <servlet-class>com.shenjw.servlet.FoodAddServlet</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>FoodAddServlet</servlet-name>

    <url-pattern>/FoodAddServlet</url-pattern>

  </servlet-mapping>

  <servlet>

    <description></description>

    <display-name>FoodDeleteServlet</display-name>

    <servlet-name>FoodDeleteServlet</servlet-name>

    <servlet-class>com.shenjw.servlet.FoodDeleteServlet</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>FoodDeleteServlet</servlet-name>

    <url-pattern>/FoodDeleteServlet</url-pattern>

  </servlet-mapping>

    <servlet>

    <description></description>

    <display-name>FoodUpdateServlet</display-name>

    <servlet-name>FoodUpdateServlet</servlet-name>

    <servlet-class>com.shenjw.servlet.FoodUpdateServlet</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>FoodUpdateServlet</servlet-name>

    <url-pattern>/FoodUpdateServlet</url-pattern>

  </servlet-mapping>

   <servlet>

    <description></description>

    <display-name>SelectServlet</display-name>

    <servlet-name>SelectServlet</servlet-name>

    <servlet-class>com.shenjw.servlet.SelectServlet</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>SelectServlet</servlet-name>

    <url-pattern>/SelectServlet</url-pattern>

  </servlet-mapping>

</web-app>

我之前有些servlet里使用了注解，后来删除了，全部使用配置文件来配置，servlet解析正常，但是就是无法应用启动的时候InitServlet自动创建