Spring AOP

<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjrt -->
<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjrt</artifactId>
    <version>1.9.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjtools -->
<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjtools</artifactId>
    <version>1.9.5</version>
</dependency>

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface TimeLog {
    /**
     * 方法描述
     *
     * @param
     * @return
     * @author lin
     * @date 2020/4/7 12:03
     **/
    String description();
}

@Aspect
@Component
public class TimeLogAspect {

    @Pointcut("@annotation(my.learn.annotationtest.TimeLog)")
    private void controllerAspect() {
    }

    @Around("controllerAspect()")
    public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
        System.out.println("---around start---");
        Object object = joinPoint.proceed();
        System.out.println("---around end---");
        return object;
    }

    @Before("controllerAspect()")
    public void before() {
        System.out.println("---before---");
    }

    @After("controllerAspect()")
    public void after() {
        System.out.println("---after---");
    }

    @AfterReturning(pointcut = "controllerAspect()", returning = "res")
    public void afterReturning(JoinPoint joinPoint, Object res) throws Throwable {
        System.out.println("---afterReturning start---");
        //类名
        String targetName = joinPoint.getTarget().getClass().getSimpleName();
        System.out.println("类名:" + targetName);
        MethodSignature ms = (MethodSignature) joinPoint.getSignature();
        //方法名
        String methodName = ms.getName();
        System.out.println("方法名:" + methodName);
        //入参key
        String[] parameterNames = ms.getParameterNames();
        //入参value
        Object[] arguments = joinPoint.getArgs();
        for (int i = 0; i < parameterNames.length; i++) {
            System.out.println("参数" + i + ":" + parameterNames[i] + "=" + arguments[i]);
        }
        //方法的注解对象
        Method method = ms.getMethod();
        TimeLog timeLog = method.getAnnotation(TimeLog.class);
        System.out.println("方法描述：" + timeLog.description());
        System.out.println("方法名:" + method.getName());

        //有类名、方法名、方法描述、参数，即可记录日志

        System.out.println("---afterReturning end---");
    }

    @AfterThrowing("controllerAspect()")
    public void afterThrowing() {
        System.out.println("---afterThrowing---");
    }

}

@RestController
@RequestMapping("/test")
public class TestController {

    @RequestMapping("/getNow")
    @ResponseBody
    @TimeLog(description = "获取当前时间")
    public String getNow(@RequestParam(value = "userId") String userId) {
        SimpleDateFormat sdf = new SimpleDateFormat(DateUtils.DEFAULT_PATTERN);
        System.out.println("userId=" + userId);
        return sdf.format(new Date());
    }
}

---around start---
---before---
userId=6
---around end---
---after---
---afterReturning start---
类名:TestController
方法名:getNow
参数0:userId=6
方法描述：获取当前时间
方法名:getNow
---afterReturning end---