spring - org.xml.sax.SAXParseException : The matching wildcard is strict, 但找不到元素 'aop:config' 的声明

Question

我是一个新手，在 Craig Wall 的 Spring in Action 第 4 版中完成我的第一个主要基于 JAVA Spring 应用程序的示例，但我被这个错误困住了......

错误:

org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 20 in XML document from class path resource [Knights.xml] is invalid;nested exception is org.xml.sax.SAXParseException; lineNumber: 20;columnNumber: 14; cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'aop:config'.

My application works as I would expect without the <aop:config> tag in the XML file.

The XML file in question ...

<?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:aop="http://springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/aop
                    http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
                    http://www.springframework.org/schema/beans
                    http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="knight" class="knights.BraveKnight">
        <constructor-arg ref="quest" />
    </bean>
    <bean id="quest" class="quests.SlayDragonQuest">
        <constructor-arg value="#(T(System).out)" />
    </bean>
    <bean id="minstrel" class="epic.Minstrel">
        <constructor-arg value="#(T(System).out" />
    </bean>

    <aop:config>
        <aop:aspect ref="minstrel">
            <aop:pointcut id="embark" expression="execution(* *.embarkOnQuest(..))" />

            <aop:before pointcut-ref="embark" method="singBeforeQuest" />

            <aop:after pointcut-ref="embark" method="singAfterQuest" />
        </aop:aspect>
    </aop:config>
</beans>

如果有任何建议，我将不胜感激。谢谢。

Answer 1

尝试将 www 添加到命名空间元素:xmlns:aop="http://www.springframework.org/schema/aop"