java interface 获取 泛型的真实类型
default Class<T> thisTClass() { Class<?> class1 = getClass(); Class<?> interfaces = class1.getInterfaces()[0]; Type[] genericInterfaces = interfaces.getGenericInterfaces(); Type type = genericInterfaces[0]; if( type instanceof ParameterizedType ){ ParameterizedType pType = (ParameterizedType)type; Type clazz = pType.getActualTypeArguments()[0]; if( clazz instanceof Class<?> ){ return (Class<T>) clazz; } } return null; }