我定期看到具有以下结构的Java类：

class MyClass implements Serializable {

private static final long serialVersionUID = 1L;

// ...

private void writeObject(final java.io.ObjectOutputStream s) throws IOException {

s.defaultWriteObject();

}

private void readObject(final java.io.ObjectInputStream s) throws IOException, ClassNotFoundException {

s.defaultReadObject();

}

}

据我所知,对于默认序列化,您只需要声明可序列化接口的实现并定义serialVersionUID.是否有任何理由使用默认实现声明写/读方法？我厌倦了关于代码重复的分析器警告.

没有看到任何关于这个主题的非常明确的指南.一切都有点过时或非常主观.

解决方法:

ObjectInputStream#defaultReadObject和ObjectOutputStream#defaultWriteObject方法适用于您希望使用默认值编写字段以及您有其他读取或写入信息,或者您想要修改读取或写入内容的情况.如果您不想添加或更改任何内容,则仅在实现Serializable时添加显式调用没有任何优势.

The default mechanism is used automatically when reading or writing objects that implement the Serializable interface and do no further customization. The serializable fields are mapped to the corresponding fields of the class and values are either written to the stream from those fields or are read in and assigned respectively. If the class provides writeObject and readObject methods, the default mechanism can be invoked by calling defaultWriteObject and defaultReadObject. When the writeObject and readObject methods are implemented, the class has an opportunity to modify the serializable field values before they are written or after they are read.

标签：java,serialization

来源： https://codeday.me/bug/20190623/1274141.html