Question

// Launcher.java

    import com.rippleworks.spring.Macbeth;
    import org.springframework.context.annotation.AnnotationConfigApplicationContext;

    public class Launcher {
        public static void main(String... args){
            AnnotationConfigApplicationContext context =
                    new AnnotationConfigApplicationContext(ProjectConfig.class);
            Macbeth drama = context.getBean(Macbeth.class);
            drama.perform();
            context.close();
        }
    }

// Macbeth.java 
package com.rippleworks.spring;

import com.rippleworks.spring.interfaces.Performance;
import org.springframework.stereotype.Component;

@Component
public class Macbeth implements Performance {

    @Override
    public void perform() {
        System.out.println("Macbeth playing..");
    }
}


// Audience.java

package com.rippleworks.spring;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;


@Aspect
public class Audience {

    @Pointcut("execution(* com.rippleworks.spring.Macbeth.perform(..))")
    public void performance(){}

    @Before("performance()")
    public void silentCellphones() {
        System.out.println("Cell phones are now silent.");
    }
}


// ProjectConfig.java

@Configuration
@EnableAspectJAutoProxy
@ComponentScan(basePackages = "com.rippleworks.spring")
public class ProjectConfig {
    // If I comment out this method, I wont get a NotSuchBeanDefExp
    // for class Macbeth. Weird :-(
    @Bean
    public Audience audience() {
        return new Audience();
    }
}

您好，Iam在弹簧中使用AspectJ Style AOP时遇到问题（IntelliJ IDEA Ultimate Version）。不使用方面时，输出是预期的。但是当我将Aspect类Audience声明为Bean时，我得到了Macbeth类的NoSuchBeanDefinitionException。

2017年8月27日上午9:38:39 org.springframework.context.annotation.AnnotationConfigApplicationContext prepareRefresh INFO：刷新 org.springframework.context.annotation.AnnotationConfigApplicationContext@799f7e29：启动日期[Sun Aug 27 09:38:39 IST 2017];上下文层次结构的根线程“main”中的异常 org.springframework.beans.factory.NoSuchBeanDefinitionException：没有 “com.rippleworks.spring.Macbeth”类型的限定bean可用于 org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean（DefaultListableBeanFactory.java:353）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean（DefaultListableBeanFactory.java:340）在 org.springframework.context.support.AbstractApplicationContext.getBean（AbstractApplicationContext.java:1090）在Launcher.main（Launcher.java:10）

感谢您的时间。

Answer 1

尝试直接在建议类型上提供切入点。您可以直接在@before中使用切入点表达式进行检查。

@Before("execution(* com.rippleworks.spring.Macbeth.perform(..))")
public void silentCellphones() {
    System.out.println("Cell phones are now silent.");
}

声明多个bean时的NoSuchBeanDefinitionException

1 个答案: