自定义注解拦截器代码实现

获取某个类或者方法是否有自定义注解demo
seata 2.3.0 GlobalTransactionalInterceptorParser

 protected boolean existsAnnotation(Class<?>... classes) {
        boolean result = false;
        if (CollectionUtils.isNotEmpty(classes)) {
            for (Class<?> clazz : classes) {
                if (clazz == null) {
                    continue;
                }
                GlobalTransactional trxAnno = clazz.getAnnotation(GlobalTransactional.class);
                if (trxAnno != null) {
                    return true;
                }
                Method[] methods = clazz.getMethods();
                for (Method method : methods) {
                    trxAnno = method.getAnnotation(GlobalTransactional.class);
                    if (trxAnno != null) {
                        methodsToProxy.add(method.getName());
                        result = true;
                    }

                    GlobalLock lockAnno = method.getAnnotation(GlobalLock.class);
                    if (lockAnno != null) {
                        methodsToProxy.add(method.getName());
                        result = true;
                    }
                }
            }
        }
        return result;
    }