通配符的匹配很全面, 但无法找到元素 'context:component-scan' 的声明

一开始的context.xml中的配置文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <context:component-scan base-package="com.alice.*"/>
    <context:property-placeholder location="classpath:config.properties"/>
    <import resource="classpath*:application-cache.xml" />
    <import resource="classpath*:application-spring.xml" />
    <import resource="classpath*:application-mybatis.xml"/>
</beans>

结果运行的时候报以下的错误

通配符的匹配很全面, 但无法找到元素 'context:component-scan' 的声明

经各种百度，错误原因在于beans中的元素不全面，至少缺少以下两个

http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context.xsd

补充完整后，运行即可。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context.xsd">
    <context:component-scan base-package="com.alice.*"/>
    <context:property-placeholder location="classpath:config.properties"/>
    <import resource="classpath*:application-cache.xml" />
    <import resource="classpath*:application-spring.xml" />
    <import resource="classpath*:application-mybatis.xml"/>
</beans>