你如何制作对象的深拷贝? [英] How do you make a deep copy of an object?

问题描述

实现深度对象复制功能有点困难.您采取了哪些步骤来确保原始对象和克隆对象不共享任何引用?

It's a bit difficult to implement a deep object copy function. What steps you take to ensure the original object and the cloned one share no reference?

推荐答案

一个安全的方法是序列化对象，然后反序列化.这可确保所有内容都是全新的参考.

A safe way is to serialize the object, then deserialize. This ensures everything is a brand new reference.

这里有一篇文章介绍如何有效地做到这一点.

Here's an article about how to do this efficiently.

注意事项:类可能会覆盖序列化，从而不创建新实例，例如对于单身人士.如果您的类不可序列化，这当然也不起作用.

Caveats: It's possible for classes to override serialization such that new instances are not created, e.g. for singletons. Also this of course doesn't work if your classes aren't Serializable.

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