"cvc-complex-type.2.4.a: Invalid content was found starting with element 'init-param'. One of '{"http://java.sun.com/xml/ns/javaee":run-as, "http://java.sun.com/ xml/ns/javaee":security-role-ref}' is expected." 的解决方法

项目使用的是Spring MVC,之前使用的 web.xml 使用的是2.4版本的，今天把它升级至2.5版本，但是升级之后，spring mvc 的 servlet 的声明报错了：

<servlet>
    <servlet-name>apps</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>5</load-on-startup>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:resources/applicationContext.xml</param-value>
    </init-param>
</servlet>

报的错如下：

cvc-complex-type.2.4.a: Invalid content was found starting with element 'init-param'. One of '{"http://java.sun.com/xml/ns/javaee":run-as, "http://java.sun.com/
 xml/ns/javaee":security-role-ref}' is expected.

这个问题怎么解决呢？其实很简单，只要将“<load-on-startup>5</load-on-startup>”调个位置就好了，见下面：

<servlet>
    <servlet-name>apps</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:resources/applicationContext.xml</param-value>
    </init-param>
    <load-on-startup>5</load-on-startup>
</servlet>