usage of the serialVersionUID

最新推荐文章于 2020-05-15 14:10:37 发布

原创最新推荐文章于 2020-05-15 14:10:37 发布 · 230 阅读

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本文探讨了在对象序列化过程中使用 serialVersionUID 的重要性。当对象被序列化并存储到文件中时，若对象字段可能发生变更，则需指定 serialVersionUID 来确保序列化兼容性。文章通过实例说明了如果不使用 serialVersionUID，在读取已修改的对象时会遇到异常。

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we will use it when we serialize object and store the object to file.

if there no compatibility demand,we can not use it. we should use it in the under conditions:

for one object with serializable ,our target is to store it to file and the field in object may be modified ,so we should use serialVersionUID,otherwise exception will appear.

for example:

one object Employee which include a field "Name",we had store the object to file before modify the field that may be modified to "Name2". the uid of the object which had stored will be different with the uid of the object which modified in late,so there will display exception when we want to read it to memory.