问题描述
我正在实现一个可序列化的类(因此它是一个使用 RMI 的值对象).但我需要测试一下.有没有办法轻松做到这一点?
I am implementing a class to be Serializable (so it's a value object for use w/ RMI). But I need to test it. Is there a way to do this easily?
澄清:我正在实现这个类，所以在类定义中坚持 Serializable 是微不足道的.我需要手动序列化/反序列化它以查看它是否有效.
clarification: I'm implementing the class, so it's trivial to stick Serializable in the class definition. I need to manually serialize/deserialize it to see if it works.
我发现了这个 C# 问题，Java 有类似的答案吗?
I found this C# question, is there a similar answer for Java?
推荐答案
简单的方法是检查对象是 java.io.Serializable 或 java.io 的实例.可外部化，但这并不能真正证明该对象确实是可序列化的.
The easy way is to check that the object is an instance of java.io.Serializable or java.io.Externalizable, but that doesn't really prove that the object really is serializable.
唯一可以确定的方法是真实尝试.最简单的测试是这样的:
The only way to be sure is to try it for real. The simplest test is something like:
new ObjectOutputStream(new ByteArrayOutputStream()).writeObject(myObject);
并检查它没有抛出异常.
and check it doesn't throw an exception.
Apache Commons Lang 提供了一个更简洁的版本:
Apache Commons Lang provides a rather more brief version:
SerializationUtils.serialize(myObject);
再次检查异常.
您还可以更严格，并检查它是否反序列化回与原始内容相同的内容:
You can be more rigourous still, and check that it deserializes back into something equal to the original:
Serializable original = ...
Serializable copy = SerializationUtils.clone(original);
assertEquals(original, copy);
等等.
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