Tutorial :Spring AOP error



Question:

What would cause this problem at run-time?:

The matching wildcard is strict, but no declaration can be found for element 'aop:config'

Here is the relevant Spring XML:

<beans xmlns="http://www.springframework.org/schema/beans"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xmlns:util="http://www.springframework.org/schema/util"         xmlns:aop="http://www.springframework.org/schema/aop"         xsi:schemaLocation="http://www.springframework.org/schema/beans         http://www.springframework.org/schema/beans/spring-beans-2.0.xsd         http://www.springframework.org/schema/util         http://www.springframework.org/schema/util/spring-util-2.0.xsd         http://www.springframework.org/schema/aop         http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">      .      .      .      <aop:config>          <aop:advisor pointcut="execution(* acme.exam.driver.ui.components..*(..))"                        advice-ref="loggingInterceptor" />      </aop:config>        <bean id="loggingInterceptor"             class="org.springframework.aop.interceptor.CustomizableTraceInterceptor">          <property name="enterMessage"                     value="ENTER: $[targetClassShortName].$[methodName]($[arguments])" />          <property name="exitMessage"                     value="EXIT: $[targetClassShortName].$[methodName]($[arguments]) = $[returnValue])" />      </bean>  </beans>  

Note that I’ve already put aspectjweaver.jar and aspectjrt.jar on the class path.


Solution:1

Did you doublecheck the spring aop artifact on classpath ?

And according to my maven dependencies, aspectjweaver is not enough, i needed also aspectjrt.


Solution:2

Make sure that <spring-framework-directory>/dist/modules/spring-aop.jar is in your class path.


Solution:3

For anyone else, I resolved this error in my configuration, where the namespace included the item

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

though had not included the xsi:schemaLocation elements

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

This configuration error caused the message above.
Adding in the schemaLocation elements resolved it.


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