Action.java

//此注解只能修飾方法
@Target(ElementType.METHOD)
//當(dāng)前注解如何去保持
@Retention(RetentionPolicy.RUNTIME)
//生成到API文檔
@Documented
public @interface Action {
    String name();
}

AopConfig.java

//JAVA配置類
@Configuration
//Bean掃描器
@ComponentScan("com.wangzhi.springboot.aop.test")
//開啟spring對aspectJ的支持
@EnableAspectJAutoProxy
public class AopConfig {}

這個類下的方法我們采用注解來攔截

@Service
public class DemoAnnotationService {

    @Action( name = "注解式攔截的add操作")
    public void add() {}
}

這個類下的方法我們采用方法規(guī)則來攔截

@Service
public class DemoMethodService {
    public void add() {}
}

LogAspect.java

@Aspect
@Component
public class LogAspect {
    
    //定義切面
    @Pointcut("@annotation(com.wangzhi.springboot.aop.test.Action)")
    public void annotationPointCut() {}
    
    //聲明一個advice,并使用@pointCut定義的切點
    @After("annotationPointCut()")
    public void after(JoinPoint joinPoint) {
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        //從切面中獲取當(dāng)前方法
        Method method = signature.getMethod();
        //得到了方,提取出他的注解
        Action action = method.getAnnotation(Action.class);
        //輸出
        System.out.println("注解式攔截" + action.name());
    }
    //定義方法攔截的規(guī)則
    @Before("execution(* com.wangzhi.springboot.aop.test.DemoMethodService.*(..))")
    public void before(JoinPoint joinPoint) {
        MethodSignature signature =  (MethodSignature) joinPoint.getSignature();
        //攔截了方法
        Method method = signature.getMethod();
        //直接獲取方法名字
        System.out.println("方法規(guī)則式攔截" + method.getName());
    }
}

啟動器

public class Application {
    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(AopConfig.class);
        DemoMethodService methodService = context.getBean(DemoMethodService.class);
        DemoAnnotationService annotationService = context.getBean(DemoAnnotationService.class);
        
        annotationService.add();
        methodService.add();
        
        context.close();
    }
}

pom.xml依賴

<!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>4.3.12.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjrt -->
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>1.8.10</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.8.10</version>
    </dependency>