java对象序列化是否在1.5和1.6之间兼容 [英] Is java object serialization compatible between 1.5 and 1.6

问题描述

我想知道混合jdk 1.5和1.6（Java 6）对象序列化（biderctional communication）是否安全。我搜索了太阳关于这个问题的明确声明，但没有成功。所以，除了技术可行性之外，我正在寻找关于这个问题的官方声明。

I am wondering whether it is safe to mix jdk 1.5 and 1.6 (Java 6) object serialization (biderctional communication). I searched for an explicit statement from sun concerning this question but did not succeed. So, besides the technical feasability I am searching for an "official" statement concerning the problem.

推荐答案

序列化机制本身没有改变。对于个别课程，它将取决于具体的课程。如果类具有serialVersionUID字段，则应该指示序列化兼容性。

The serialization mechanism itself has not changed. For individual classes it will depend on the specific class. If a class has a serialVersionUID field, this is supposed to indicate serialization compatiblity.

类似于：

private static final long serialVersionUID = 8683452581122892189L;

如果不变，则序列化版本兼容。对于JDK类，这是有保证的，但当然总是可能在进行重大更改后忘记更新serialVersionUID。

If it is unchanged, the serialized versions are compatible. For JDK classes this is guaranteed, but of course it is always possible to forget to update the serialVersionUID after making a breaking change.

当JDK类不能保证兼容时，这通常在Javadoc中提到。

When JDK classes are not guaranteed to be compatible, this is usually mentioned in the Javadoc.

警告：此类的序列化对象与未来的Swing版本不兼容

Warning: Serialized objects of this class will not be compatible with future Swing releases

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