Spring AOP：在正在运行的应用程序中添加建议

    GenericApplicationContext ctx = new GenericApplicationContext();
    BeanDefinitionBuilder promotion4Advice = BeanDefinitionBuilder.rootBeanDefinition(Promotion4Action.class).addPropertyValue(\"discountPercentage\", 0.5);
    promotion4Advice.addPropertyValue(\"discountCode\", 16);
    promotion4Advice.addPropertyValue(\"discountComment\", \"50% on regular item\");
    ctx.registerBeanDefinition(\"promotion4Advice\", promotion4Advice.getBeanDefinition());

    BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(ProxyFactoryBean.class);
    builder.addPropertyValue(\"proxyTargetClass\", true);
    builder.addPropertyValue(\"interceptorNames\", new String[] {\"promotion4Advice\"});
    ctx.registerBeanDefinition(\"proxyFactoryBean\", builder.getBeanDefinition());

<bean id=\"promotion4Advice\"
    class=\"com.promotion.actions.Promotion4Action\">
    <property name=\"discountPercentage\" value=\"0.5\" />
    <property name=\"discountCode\" value=\"16\" />
    <property name=\"discountComment\" value=\"50% on regular item\" />
</bean>
<aop:config proxy-target-class=\"true\">
    <aop:aspect id=\"promotion4Aspect\" ref=\"promotion4Advice\">
        <aop:pointcut id=\"promotion4PointCut\"
            expression=\"execution(* com.controller.ShoppingBagController.defaultHandler(javax.servlet.http.HttpServletRequest)) and args(request)\" />

        <aop:before pointcut-ref=\"promotion4PointCut\" method=\"applyPromotion4\"
            arg-names=\"request\" />
    </aop:aspect>
    <aop:aspect id=\"promotion4Aspect1\" ref=\"promotion4Advice\">
        <aop:pointcut id=\"promotion4PointCut1\"
            expression=\"execution(* com.controller.ReviewOrderController.handleRequest(javax.servlet.http.HttpServletRequest)) and args(request)\" />

        <aop:before pointcut-ref=\"promotion4PointCut1\" method=\"interceptOrderDetails\"
            arg-names=\"request\" />
    </aop:aspect>
    <aop:aspect id=\"promotion4Aspect4\" ref=\"promotion4Advice\">
        <aop:pointcut id=\"promotion4PointCut4\"
            expression=\"execution(* com.controller.ShoppingBagController.applyPromoCode(javax.servlet.http.HttpServletRequest, String, String)) and args(request, promoCode, mappedURL)\" />

        <aop:after pointcut-ref=\"promotion4PointCut4\" method=\"interceptPromoCode\"
            arg-names=\"request,promoCode,mappedURL\" />
    </aop:aspect>
</aop:config>