XStream derserialization使所有对象相同

时间:2013-10-04 14:14:31

标签: java xstream objectinputstream

我有一个自定义方法,它读取XML文件并创建许多对象。

方法代码:

    public static Property[] initProperties() {
    Property p1, p2;
    XStream xstream = new XStream();
    xstream.alias("Property", Property.class);
    xstream.registerConverter(new PropsConverter());
    try {
        ObjectInputStream in = xstream.createObjectInputStream(Utils.class.getResourceAsStream("Properties.xml"));             
        p1 = (Property) in.readObject();
        System.out.println("P1_"+p1.getName());
        p2 = (Property) in.readObject();
        System.out.println("P2_"+p2.getName());
        Property[] array = {p1,p2};
        return array;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

自定义转换器在每一步都内置了System.Out.Println,因此我可以看到转换器是否正确读取内容。它做了。我有这个XML文件

<root>
<Property>
  <name>Property 1</name>
  <ownedBy>NULL</ownedBy>
  <price>1000</price>
</Property>
<Property>
  <name>Test2</name>
  <ownedBy>NULL</ownedBy>
  <price>1000</price>
</Property>
</root>

转换器向右吐出两个。当我在另一个类中调用initProperties()函数来填充新数组时,我遇到了一个问题。

主类

        try {
        Properties[] availableProperties = Utils.initProperties();
    } catch (Exception e) {
        e.printStackTrace();
    }

现在除非我完全弄错了System.out.println(availableProperties[0].getName());,否则应打印属性1,而System.out.println(availableProperties[1].getName());应打印测试2。

但我得到两行:

测试2 测试2

为什么?

自定义转换器

public class PropsConverter实现了Converter {

public boolean canConvert(Class clazz) {
    return clazz.equals(Property.class);
}

public void marshal(Object value, HierarchicalStreamWriter writer,
        MarshallingContext context) {
    Property props = (Property) value;
    writer.startNode("name");
    writer.setValue(props.getName());
    writer.endNode();
    writer.startNode("ownedBy");
    writer.setValue(props.getName());
    writer.endNode();
    writer.startNode("price");
    writer.setValue(props.getPriceAsString());
    writer.endNode();
}

public Object unmarshal(HierarchicalStreamReader reader,
        UnmarshallingContext context) {
    Property props = new Property();
    reader.moveDown();
    props.setName(reader.getValue());
//        System.out.println("NAME_" + reader.getValue());
    reader.moveUp();
    reader.moveDown();
    props.setOwnedBy(reader.getValue());
//        System.out.println("OWNEDBY_" + reader.getValue());
    reader.moveUp();
    reader.moveDown();
    props.setPrice(Float.parseFloat(reader.getValue()));
 //        System.out.println("PRICE_" + reader.getValue());
    reader.moveUp();
    return props;
}
}

0 个答案:

没有答案