通过@Aspect切面自定义注解

一种通过切面编程来自定义注解，以下代码demo是通过自定义注解对加密参数进行验证的过程，不用关心代码的业务过程，直接看通过@Aspect是如何自定义注解的，有了以下代码，springboot工程中的主类还需要加

@EnableAspectJAutoProxy 注解

直接看代码：

@Documented
@Target({ElementType.PARAMETER, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface SignCheck {

}

@Slf4j
@Aspect
@Configuration
public class SignCheckAspect {
    private String secret = "123123";
    private Long expire = (1000 * 60) * 2L;

    // 定义切点方法
    @Pointcut("@annotation(com.ecej.ecejcomponents.basic.anotation.SignCheck)")
    public void pointCut() {
    }

    @Around("pointCut()")
    public void around(ProceedingJoinPoint joinPoint) {
        String signStr = RequestUtils.getHeader("sign");
        // 拦截的类名
        Class clazz = joinPoint.getTarget().getClass();
        // 拦截的方法
        Method method = ((MethodSignature) joinPoint.getSignature()).getMethod();

        SignCheck annotation = method.getAnnotation(SignCheck.class);
        if (annotation != null) {
            log.info("类：" + clazz + " 方法:" + method + " 获取到注解");
        }
        Object[] values = joinPoint.getArgs();
        if (values.length == 0) {
            return;
        }
        //目前只支持post请求
        Object vo = values[0];
        Map map = BeanUtil.beanToMap(vo);
        String paramSign = ParamsEncodeUtil.createSign(map, secret);
        if (!signStr.equals(paramSign)) {
            ExceptionUtils.throwBusinessException(ResultCodeEnum.MARKETING_INTERFACE_AUTH_FAIL_ERROR);
        }
        checkExpire(map.get("timestamp"));
    }

    //接口过期时间校验
    public void checkExpire(Object timestamp) {
        long signTime = Long.parseLong(timestamp.toString());
        long nowTime = System.currentTimeMillis();
        long mx = nowTime - signTime;
        if (mx > expire) {
            ExceptionUtils.throwBusinessException(ResultCodeEnum.MARKETING_INTERFACE_AUTH_EXPIRE_ERROR);
        }
    }
}