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我有幾個XSD，我通過它們通過XJC創建了Java代碼。我可以通過「直接映射」POJOs XJC提供的許多信息。剩下的大部分可以通過JAXBElements獲取。然而，我不知道如何與他們交談，有幾個因素，即「交易/描述」父母的「成本」因素。JAXB - 無法獲取某些對象信息
<transaction>
<aid-type code="1995-09-25"/>
<flow-type code="10">ODA</flow-type>
<provider-org ref="DE-1">BMZ</provider-org>
<value currency="EUR" value-date="1995-09-25">2070227</value>
<transaction-type code="D">Disbursement</transaction-type>
<description type="1" xml:lang="en">
<costs currency="EUR" type="Personnel costs">1060135</costs>
<costs currency="EUR" type="Material costs">665117</costs>
<costs currency="EUR" type="Other costs">344975</costs>
</description>
</transaction>
正如你可以看到Transaction.java包含「描述」元素和地圖對JAXBElement.class。
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
"valueOrDescriptionOrTransactionType"
})
@XmlRootElement(name = "transaction")
public class Transaction {
@XmlElementRefs({
@XmlElementRef(name = "transaction-date", type = JAXBElement.class, required = false),
@XmlElementRef(name = "value", type = JAXBElement.class, required = false),
@XmlElementRef(name = "disbursement-channel", type = JAXBElement.class, required = false),
@XmlElementRef(name = "receiver-org", type = JAXBElement.class, required = false),
@XmlElementRef(name = "transaction-type", type = JAXBElement.class, required = false),
@XmlElementRef(name = "description", type = JAXBElement.class, required = false),
@XmlElementRef(name = "tied-status", type = JAXBElement.class, required = false),
@XmlElementRef(name = "aid-type", type = JAXBElement.class, required = false),
@XmlElementRef(name = "finance-type", type = JAXBElement.class, required = false),
@XmlElementRef(name = "provider-org", type = JAXBElement.class, required = false),
@XmlElementRef(name = "flow-type", type = JAXBElement.class, required = false)
})
@XmlAnyElement(lax = true)
protected List<Object> valueOrDescriptionOrTransactionType;
@XmlAttribute(name = "ref")
protected String ref;
@XmlAnyAttribute
private Map<QName, String> otherAttributes = new HashMap<QName, String>();
在Transaction.java頂部的模式片段說：
...
<element name="description" type="{}textType"/>
...
那麼的 '描述' 的類型應該是JAXBElement的<TextType>。該TextType.java看起來是這樣的：
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "textType", propOrder = {"content"})
public class TextType {
@XmlMixed
@XmlAnyElement(lax = true)
protected List<Object> content;
@XmlAttribute(name = "lang", namespace = "http://www.w3.org/XML/1998/namespace")
protected String lang;
@XmlAnyAttribute
private Map<QName, String> otherAttributes = new HashMap<QName, String>();
我們得到的信息進行交易的我建立一個交易對象並獲取它的內容：
List<Object> listOfTransactionContents = transaction.getValueOrDescriptionOrTransactionType();
這給了我，我找了清單JAXBElement對象。
for (Object obj : listOfTransactionContents)
{
JAXBElement<TextType> jaxbElementTextType = (JAXBElement<TextType>) obj;
TextType textType = jaxbElementTextType.getValue();
List<Object> listOftTextTypes = textType.getContent();
....
但是，這裏是問題，我不知道如何獲得'成本'元素的內容。上述TextType.java的的getContent（）方法，它說：
* Objects of the following type(s) are allowed in the list
* {@link Element }
* {@link String }
* {@link Object }
的「成本」要素的內容必須存儲在某種名單的，因爲可以有不止一個下「描述」父。