isInstance方法的用法:
QyConstrPerfor qyConstrPerfor = new QyConstrPerfor();
QyConstrPerfor.class.isInstance(qyConstrPerfor) //判断某个对象是否是属于某个类
isAssignableFrom:
QyConstrPerfor.class.isAssignableFrom(QyConstrPerfor.class)//判断某个类是否属于某个类 (后者属于前者)
AnnotationUtils.findAnnotation:
AnnotationUtils.findAnnotation(QyQualCheckCancelController.class, ResponseBody.class) != null
查找第一个参数类中,是否涵盖ResponseBody注解。如果有,就返回此注解,没有就返回空