备忘录（Memento）模式又称标记（Token）模式。GOF给备忘录模式的定义为：在不破坏封装性的前提下，捕获一个对象的内部状态，并在该对象之外保存这个状态。这样以后就可将该对象恢复到原先保存的状态。-Memorandum of Understanding (Memento) mode, also known as tags (Token) mode. GOF to the memo mode is defined as: not undermine the premise of encapsulation, capture an object' s internal state, and in addition to preserve the state of the object. After this you can save the object back to original state.