具有类型为List< Element>的属性的JAXB编组对象. (@XmlAnyElement)不输出节点值 [英] JAXB marshalling object having property of type List<Element> (@XmlAnyElement) doesnt output node value

问题描述

以下是我从XSD文件生成的文件TPAExtensionsType.java.

Following file TPAExtensionsType.java I have generated from a XSD file.

TPAExtensionsType.java

/* 
 * <p>The following schema fragment specifies the expected content contained within this class.
 * 
 * <pre>
 * &lt;complexType name="TPA_Extensions_Type">
 *   &lt;complexContent>
 *     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
 *       &lt;sequence>
 *         &lt;any processContents='skip' maxOccurs="unbounded" minOccurs="0"/>
 *       &lt;/sequence>
 *     &lt;/restriction>
 *   &lt;/complexContent>
 * &lt;/complexType>
 * </pre>
 * 
 * 
 */ 
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "TPA_Extensions_Type", propOrder = {
    "any"
})
@XmlRootElement 
public class TPAExtensionsType {

    @XmlAnyElement
    protected List<Element> any;

    /**
     * Gets the value of the any property.
     * 
     * <p>
     * This accessor method returns a reference to the live list,
     * not a snapshot. Therefore any modification you make to the
     * returned list will be present inside the JAXB object.
     * This is why there is not a <CODE>set</CODE> method for the any property.
     * 
     * <p>
     * For example, to add a new item, do as follows:
     * <pre>
     *    getAny().add(newItem);
     * </pre>
     * 
     * 
     * <p>
     * Objects of the following type(s) are allowed in the list
     * {@link Element }
     * 
     * 
     */
    public List<Element> getAny() {
    if (any == null) {
        any = new ArrayList<Element>();
    }
    return this.any;
    }

}

以下是将上述对象编组为XML的独立应用程序.

Following is the standalone application to marshall the above object to XML.

TestUtil.java

TestUtil.java

public class TestUtil {
    public static void main(String[] args) {
        TPAExtensionsType tpaExtensions = new TPAExtensionsType();
        Element consumerInfo = new DOMElement("ConsumerInfo");
        consumerInfo.setNodeValue("Some Info");
        tpaExtensions.getAny().add(consumerInfo);

        StringWriter sw  = new StringWriter();
        JAXBContext context;
        try {
            context = JAXBContext.newInstance(TPAExtensionsType.class);
            Marshaller marshaller = context.createMarshaller();
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
            marshaller.marshal(tpaExtensions, sw);
            System.out.println(sw.toString());
        } catch (JAXBException e) {
            e.printStackTrace();
        }

    }
}

以下是输出:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<tpaExtensionsType xmlns="SOME_NAMESPACE_ HERE">
    <ConsumerInfo xmlns="" xmlns:ns2="SOME_NAMESPACE_ HERE"/>
</tpaExtensionsType>

我面临的问题:

已创建节点 ConsumerInfo ，但是尽管在上面的独立应用程序中已设置了它的值，但是在生成的XML中它的值不可见.这个问题吗?

The node ConsumerInfo has been created but its value is not visible in the generated XML though I have set its value in my standalone application above.Can anybody please help me getting this fixed and what is causing this problem?

推荐答案

引用

此节点的值，取决于其类型； 请参见上表. 如果将其定义为null，则设置无效.

如果向上滚动一点，将会看到一个表，其中提到Element类型的节点是用null nodeValue定义的.我猜这就是为什么它不显示在您的XML中的原因，因为设置它无效.

If you scroll up a bit, you'll see a table where it mentions that Element type nodes are defined with a null nodeValue. I guess that's why it doesn't show up in your XML, because setting it has no effect.

也许您可以使用 Node.setTextContent(String textContent) ?

Maybe you could use Node.setTextContent(String textContent)?

Document doc = DocumentBuilderFactory.newInstance()
                  .newDocumentBuilder().newDocument();
Element consumerInfo = doc.createElement("consumerInfo");
consumerInfo.setTextContent("some info");
doc.appendChild(consumerInfo);
TPAExtensionsType tp = new TPAExtensionsType();
tp.getAny().add((Element) doc.getFirstChild());

JAXBContext jc = JAXBContext.newInstance(TPAExtensionsType.class);
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(tp, System.out); 

输出

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<tpaExtensionsType>
    <consumerInfo>some info</consumerInfo>
</tpaExtensionsType>

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