AOP -- XML配置的一个问题

[暂7师师长常乃超]

很简单的一个程序
1.接口

public interface ArithmeticCalculator {
	public int add(int i,int j);  
    public int sub(int i,int j);  
    public int mul(int i,int j);  
    public int dev(int i,int j);
}

2.实现类

@Component
public class ArithmeticCalculatorImpl implements ArithmeticCalculator {
	
	public int add(int i, int j) {  
        int result =i+j;  
        return result;  
    }  
  
	public int sub(int i, int j) {  
        int result =i-j;  
        return result;  
    }  
	  
	public int mul(int i, int j) {  
        int result =i*j;  
        return result;  
    }  
	  
	public int dev(int i, int j) {  
        int result =i/j;  
        return result;  
    }  
	
}

3.切面

@Component(value="loggingAspect")
public class LoggingAspect {
	
	public void beforeMethod(JoinPoint joinPoint){  
        /*String methodName=joinPoint.getSignature().getName();  
        List<Object> args=Arrays.asList(joinPoint.getArgs());*/  
        System.out.println("the method "/*+methodName+" begins with "+args*/ );  
    }  
	
	public void afterMethod(JoinPoint joinPoint){  
        String methodName=joinPoint.getSignature().getName();  
        List<Object> args=Arrays.asList(joinPoint.getArgs());  
        System.out.println("the method "+methodName+" ends" );  
    }  
      
  
	public void afterReturnMethod(JoinPoint joinPoint,Object result){  
        String methodName=joinPoint.getSignature().getName();  
        System.out.println("the method "+methodName+" end ,and result with "+result );  
    } 
	
	public void afterThrowing(JoinPoint joinPoint,Exception ex){  
        String methodName=joinPoint.getSignature().getName();  
        System.out.println("the method "+methodName+" end ,and Excetion with "+ex );  
    }
	
    public Object aroundMethod(ProceedingJoinPoint pjd){  
        Object result=null;  
        String methodName=pjd.getSignature().getName();  
        try {  
            //前置通知  
            System.out.println("the method "+methodName+" begins with " +Arrays.asList(pjd.getArgs()));  
            //执行目标方法  
            result =pjd.proceed();  
            //返回通知  
            System.out.println("the method "+methodName+" return with " + result);  
        } catch (Throwable e) {  
            // 异常通知  
            e.printStackTrace();  
        }  
        //后置通知  
        System.out.println("the method "+methodName+" ends");  
        return result;    
    }  
    
}

4.测试类

@SuppressWarnings("resource")
public class XmlTest {
	public static void main(String[] args) {
		
		ApplicationContext context = new ClassPathXmlApplicationContext("applicationContextXml.xml");
		ArithmeticCalculatorImpl manager = context.getBean(ArithmeticCalculatorImpl.class);

		int x = manager.add(3, 4);
		System.out.println(x);

	}
}

5.xml配置文件

<?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://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">
      
    <!-- 启动@AspectJ支持 -->
    <aop:aspectj-autoproxy/>
    
    <!-- 指定自动搜索Bean组件，自动搜索切面类 -->
    <context:annotation-config/>
    <context:component-scan base-package="com.xml">  
    </context:component-scan>        
    <!-- Vincent's xml property -->
    
    
    <!-- 配置aop 切入点，切面，通知-->  
	<aop:config>  
	    <!-- 配置拦截表达式 切入点：符合切入点表达式的类要产生代理对象，expression就是切入点表达式 -->  
	    <aop:pointcut id="testOperation"  
	    expression="execution(* com.xml.arithmeticcalculator.ArithmeticCalculator*.*(..))"/>  
	    <!-- 配置切面 -->  
	    <aop:aspect id="calculatorloggingAspect" ref="LoggingAspect">  
	         <!--前置通知    
	               1、在目标方法执行之前    
	               2、前置通知中，方法有一个参数JoinPoint  -->    
	        <aop:before method="beforeMethod" pointcut-ref="testOperation" />  
	         <!--后置通知    
	               1、在目标方法执行之后    
	               2、能够获取目标方法的返回值  result  
	                 returning="result" result就是切面中 后置通知中的参数名称  （须一致）  
	                3、如果目标方法产生异常，则后置通知不再执行   -->    
	         <aop:after-returning method="afterReturnMethod" pointcut-ref="testOperation" returning="result"/>   
	        <!--异常通知    
	                          获取目标方法抛出的异常信息   throwing="ex"  -->    
	         <aop:after-throwing method="afterThrowing" pointcut-ref="testOperation" throwing="ex"/>   
	         <!-- 最终通知 -->    
	         <aop:after method="afterMethod" pointcut-ref="testOperation"/>   
	        <!-- 环绕通知    
	                    能够控制目标方法的执行    
	                    环绕通知可以有返回值，这个返回值就是代理对象的方法的返回值    
	                    前置通知和后置通知只能在目标方法执行之前和之后加代码，但是不能控制目标方法的执行   -->    
	        <!-- <aop:around method="aroundMethod" pointcut-ref="testOperation"/> -->  
	    </aop:aspect>  
	</aop:config>  
</beans>

如上，xml中，当把aop的标签注释掉，程序就不报错，如果加上，出现如下错误信息：
信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@3abbfa04: defining beans [arithmeticCalculatorImpl,loggingAspect,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.aop.aspectj.AspectJPointcutAdvisor#0,testOperation,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy
Exception in thread "main" org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.xml.arithmeticcalculator.ArithmeticCalculatorImpl] is defined
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:295)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1125)
at com.xml.main.XmlTest.main(XmlTest.java:16)

求教！！！
送分哦~~~

[独家de记忆]

看你的异常，做出以下修改

//ArithmeticCalculatorImpl manager = context.getBean(ArithmeticCalculatorImpl.class);
ArithmeticCalculatorImpl manager = context.getBean("arithmeticCalculatorImpl");

[独家de记忆]

当一个组件在某个扫描过程中被自动检测到时，会根据那个扫描器的BeanNameGenerator 策略生成它的bean名称。默认情况下，任何包含 name值的Spring“典型”注解 (@Component、@Repository、 @Service和@Controller) 会把那个名字 提供给相关的bean定义。如果这个注解不包含name值或是其他检测到的组件 (比如被自定义过滤器发现的)，默认bean名称生成器会返回小写开头的非限定(non-qualified)类名。