Question

我是Spring AOP和注释的新手。我试着编写一个使用Aspect的简单程序。我无法弄清楚我哪里出错了。它没有打印出我所看到的内容。

package com.business.main;

import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@EnableAspectJAutoProxy
@Configuration
public class PrintMain {

    public static void main(String[] args) {
        // Do I always need to have this. Can't I just use @Autowired to get beans
        ApplicationContext ctx = new AnnotationConfigApplicationContext(PrintMain.class);
        CheckService ck = (CheckService)ctx.getBean("service");
        ck.print();
    }

    @Bean(name="service")
    public CheckService service(){
        return new CheckService();
    }

}

package com.business.main;

import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class SimpleAspect {

    @Around("execution(* com.business.main.CheckService.*(..))")
    public void applyAdvice(){
        System.out.println("Aspect executed");
    }
}

package com.business.main;

import org.springframework.stereotype.Component;

@Component
public class CheckService{
    public void print(){
        System.out.println("Executed service method");
    }
}

输出：已执行的服务方法

我希望打印我在Aspect中的内容

Answer 1

我认为你的@Component不起作用！也许，你需要@ComponentScan

@EnableAspectJAutoProxy
@ComponentScan
@Configuration
public class PrintMain {

    public static void main(String[] args) {
        // Do I always need to have this. Can't I just use @Autowired to get beans
        ApplicationContext ctx = new AnnotationConfigApplicationContext(TNGPrintMain.class);
        CheckService ck = (CheckService)ctx.getBean("service");
        ck.print();
    }

    @Bean(name="service")
    public CheckService service(){
        return new CheckService();
    }

}

Spring AOP - 无法执行Aspect

1 个答案: