我猜你的有效載荷如下所示：XML
<root>
<parent-element>
<id-00001>value 1</id-00001>
<id-00002>value 2</id-00002>
</parent-element>
</root>
要讀取具有動(dòng)態(tài)名稱的節(jié)點(diǎn)，我們需要編寫(xiě)自定義適配器（）。假設(shè)該模型如下所示：javax.xml.bind.annotation.adapters.XmlAdapter
@XmlRootElement(name = "root")
@XmlAccessorType(XmlAccessType.FIELD)
class Root {
@XmlElement(name = "parent-element")
@XmlJavaTypeAdapter(IdsXmlAdapter.class)
private MultiItemList list;
// getters, setters, toString
}
class MultiItemList {
private List<String> ids;
// getters, setters, toString
}
對(duì)于上述和型號(hào)，自定義適配器可能如下所示：XMLPOJO
class IdsXmlAdapter extends XmlAdapter<Object, MultiItemList> {
@Override
public MultiItemList unmarshal(Object v) {
Element element = (Element) v;
NodeList childNodes = element.getChildNodes();
List<String> ids = new ArrayList<>(childNodes.getLength());
for (int i = 0; i < childNodes.getLength(); i++) {
Node item = childNodes.item(i);
if (item.getNodeName().equals("#text")) {
continue;
}
ids.add(item.getTextContent());
}
MultiItemList multiItemList = new MultiItemList();
multiItemList.setIds(ids);
return multiItemList;
}
@Override
public Object marshal(MultiItemList v) throws Exception {
return null; // Implement if needed
}
}
用法示例：
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.adapters.XmlAdapter;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
public class JaxbApp {
public static void main(String[] args) throws Exception {
File xmlFile = new File("./resource/test.xml").getAbsoluteFile();
JAXBContext jaxbContext = JAXBContext.newInstance(Root.class);
Object unmarshal = jaxbContext.createUnmarshaller().unmarshal(new FileReader(xmlFile));
System.out.println(unmarshal);
}
}
指紋：
Root{list=Root{ids=[value 1, value 2]}}
請(qǐng)注意，由于異常，您無(wú)法直接實(shí)現(xiàn)適配器：XmlAdapter<Element, MultiItemList>
Exception in thread "main" com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions
org.w3c.dom.Element is an interface, and JAXB can't handle interfaces.
this problem is related to the following location:
at org.w3c.dom.Element
