java - 尝试使用 Java Spring AOP 抛出 "org.springframework.beans.factory.BeanCreationException"

Question

我正在尝试在我的 IDE 上运行一个简单的 AOP 示例。

下面是我的代码。

我在下面收到此错误。

请帮我理解为什么..

org.springframework.beans.factory.BeanCreationException:创建名称为“org.springframework.context.event.internalEventListenerProcessor”的bean时出错:bean初始化失败；嵌套异常是 java.lang.IllegalArgumentException: error at::0formal unbound in pointcut 在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:564) ~[spring-beans-4.3.18.RELEASE.jar:4.3.18.RELEASE]

AotSpringMain

@SpringBootApplication
public class AotSpringMain {

    public static void main(String[] args) {
        ApplicationContext ctx = SpringApplication.run(AotSpringMain.class, args);
        HumanFactory humanFactory = (HumanFactory)ctx.getBean("humanFactory");
        System.out.println(humanFactory.getFemale().getName());
        humanFactory.getFemale().setName("aaa");
        System.out.println(humanFactory.getFemale().getName());

    }
}

日志方面

@Aspect
@Component
public class LoggingAspect {

    @Before("execution(* com.my_aop_example.HumanFactory.*(..))")
    public void logBefore(JoinPoint joinPoint, Object result) {

        System.out.println("Log before start");
        System.out.println("Name: " + joinPoint.getSignature().getName());
        System.out.println("Log before end");

    }

}

人类工厂

package com.my_aop_example;


import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

@Service
public class HumanFactory {
    @Autowired
    @Qualifier("Male")
    Human Male;
    @Autowired
    @Qualifier("Female")
    Human female;

    public Human getMale() {
        return Male;
    }

    public Human getFemale() {
        return female;
    }

Answer 1

没有参数对象结果

  @Before("execution(* com.my_aop_example.HumanFactory.*(..))")
  public void logBefore(JoinPoint joinPoint) {

    System.out.println("Log before start");
    System.out.println("Name: " + joinPoint.getSignature().getName());
    System.out.println("Log before end");

  }