注解开发AOP

配置类

@Configuration//声明当前类是一个配置类，相当于一个Spring的XML配置文件
@EnableAspectJAutoProxy //表示开启AOP代理自动配置
public class LogConfigation {
}

注解

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface LogAnnotation {
    String value() default "";
}

切面类

@Component
@Aspect
public class LogAspect {
    //表示只要加了注解LogAnnotation的方法都是要织入的点
    @Pointcut("@annotation(com.example.demo.AOP.LogAnnotation)")
    public void logAspect(){

    }

    //在使用了注解LogAnnotation的方法执行之前执行beforeMethod
    @Before("logAspect()")
    public void beforeMethod(JoinPoint joinpoint)
    {
        System.out.println("前置通知");
        System.out.println(joinpoint.getSignature().getName());
        System.out.println(joinpoint.getSignature().getDeclaringType().getName());
    }

}

服务接口

public interface HelloService {
    String getHello();
}

服务实现类

@Service("HelloService")
public class HelloServiceImpl implements HelloService {
    @Override
    @LogAnnotation("f")
    public String getHello() {
        System.out.println("hello");
        return "hello";
    }
}

测试类

import lombok.extern.slf4j.Slf4j;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.context.web.WebAppConfiguration;


@RunWith(SpringRunner.class)
@WebAppConfiguration
@SpringBootTest
@Slf4j
public class test {

    @Autowired
    private HelloService helloService;


    @Test
    public void run(){
        String hello = helloService.getHello();
        System.out.println(hello);
    }
}