java错误-The prefix "aop" for element "aop:aspectj-autoproxy" is not bound.

配置springmvc的aop时出错：

当我向配置文件中添加：<aop:aspectj-autoproxy proxy-target-class="true"/> 时出错：

The prefix "aop" for element "aop:aspectj-autoproxy" is not bound.

org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 16 in XML document from
class path resource [springmvc.xml] is invalid; nested exception is org.xml.sax.SAXParseException: The prefix "aop" for element "aop:aspectj-autoproxy"
is not bound.

解决方法：

添加这些有关AOP的配置：
xmlns:aop="http://www.springframework.org/schema/aop"
和

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"

添加后如下面所示：
<beans xmlns="http://www.springframework.org/schema/beans"

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

xmlns:p="http://www.springframework.org/schema/p"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:mvc="http://www.springframework.org/schema/mvc"

xmlns:aop="http://www.springframework.org/schema/aop"

xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-3.0.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd

http://www.springframework.org/schema/aop

http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

spring配置文件详解：

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