JAXB与动态元素的编组 [英] JAXB Unmarshalling with dynamic elements
问题描述
下面有一个XML.
<hotelRoomDetails>
<NightRates>
<Night1>67</Night1>
<Night2>67.5</Night2>
........
........
<Night25>65</Night25>
</NightRates>
.......
</hotelRoomDetails>
元素Night1,Night2,Night3始终是动态的,并且此计数可能在1到35倍之间变化.父标签<NightRates>
始终是一致的.
The element Night1,Night2,Night3 are always dynamic, and this count may vary from 1 to 35 times. Parent tag <NightRates>
is always consistent.
元素<Night1>
,<Night2>
..不具有任何其他属性.它提供有关每晚酒店房价的信息.
The element <Night1>
, <Night2>
.. are not having any other attribute. It gives information about the hotel rate per night.
我想创建一个"LinkedList"(保留订单),其中包含各个夜晚的房价信息.在不知道元素出现次数的情况下如何处理这种情况?如何为此XML创建Java类?
I want to create a 'LinkedList'(to preserve order) which contains the rate information of individual night. How can I handle this situation without knowing the occurrence count of element? How to create java class for this xml?
推荐答案
仅解组
如果您只是在进行编组,则可以使用StreamReaderDelegate
去除数字后缀.
演示
import javax.xml.bind.*;
import javax.xml.stream.*;
import javax.xml.stream.util.StreamReaderDelegate;
import javax.xml.transform.stream.StreamSource;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(HotelRoomDetails.class);
XMLInputFactory xif = XMLInputFactory.newFactory();
XMLStreamReader xsr = xif.createXMLStreamReader(new StreamSource("src/forum19834756/input.xml"));
xsr = new StreamReaderDelegate(xsr) {
@Override
public String getLocalName() {
String localName = super.getLocalName();
if(localName.startsWith("Night") && !localName.equals("NightRates")) {
return "Night";
}
return localName;
}
};
Unmarshaller unmarshaller = jc.createUnmarshaller();
HotelRoomDetails details = (HotelRoomDetails) unmarshaller.unmarshal(xsr);
System.out.println(details.getNightRates().size());
}
}
HotelRoomDetails
然后您有一个collection属性,该属性映射到名为Night
的元素.
Then you have a collection property that maps to the element called Night
.
import java.util.*;
import javax.xml.bind.annotation.*;
@XmlRootElement
public class HotelRoomDetails {
private List<String> nightRates = new ArrayList<String>();
@XmlElementWrapper(name = "NightRates")
@XmlElement(name = "Night")
public List<String> getNightRates() {
return nightRates;
}
}
元帅&元帅
注意::我是 EclipseLink JAXB(MOXy ) 的负责人和 JAXB(JSR -222) 专家组.
Unmarshal & Marshal
Note: I'm the EclipseLink JAXB (MOXy) lead and a member of the JAXB (JSR-222) expert group.
如果您需要支持对此格式的读写,则可以使用MOXy的@XmlVariableNode
扩展名.
If you need to support reading and writing to this format you could use MOXy's @XmlVariableNode
extension.
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