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java xstream自定义序列化

小樊
90
2024-07-21 14:50:04
栏目: 编程语言

要自定义XStream序列化,您可以实现com.thoughtworks.xstream.converters.Converter接口并覆盖marshal()unmarshal()方法。这样可以自定义对象的序列化和反序列化逻辑。

下面是一个示例,展示如何自定义序列化一个Person对象:

import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.HierarchicalStreamReader;
import com.thoughtworks.xstream.converters.MarshallingContext;
import com.thoughtworks.xstream.converters.UnmarshallingContext;

public class PersonConverter implements Converter {

    @Override
    public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
        Person person = (Person) source;
        writer.startNode("name");
        writer.setValue(person.getName());
        writer.endNode();
        writer.startNode("age");
        writer.setValue(String.valueOf(person.getAge()));
        writer.endNode();
    }

    @Override
    public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
        reader.moveDown();
        String name = reader.getValue();
        reader.moveUp();

        reader.moveDown();
        int age = Integer.parseInt(reader.getValue());
        reader.moveUp();

        return new Person(name, age);
    }

    @Override
    public boolean canConvert(Class type) {
        return type.equals(Person.class);
    }
}

在上面的示例中,PersonConverter实现了Converter接口,并覆盖了marshal()unmarshal()方法来自定义Person对象的序列化和反序列化逻辑。canConvert()方法指定了该转换器可以处理哪种类型的对象。

然后,您可以将PersonConverter注册到XStream实例中,如下所示:

XStream xstream = new XStream();
xstream.registerConverter(new PersonConverter());

现在,当您序列化或反序列化Person对象时,XStream将使用您自定义的转换器来处理对象。

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