JAXB对没有@XMLRootElement的子元素进行编组和解组

Question

我正在尝试编组一个子元素对象来获取xml字符串。然后使用这个xml字符串我也想要Unmarshall。

为了澄清，我已经从xsd生成了我的jaxb类，并且在ObjectFactory中没有任何方法可以提供所需的对象。

xsd defination：IBUSStatusType是根元素IBUSMessage的子元素

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://soa.myhealth.com/ibus/v1.1.0" targetNamespace="http://soa.myhealth.com/ibus/v1.1.0" elementFormDefault="qualified">
	<xsd:element name="IBUSMessage" type="tns:IBUSMessage"/>
	<xsd:complexType name="IBUSMessage">
		<xsd:sequence>
			<xsd:element name="Header" type="tns:IBUSHeaderType"/>
			<xsd:element name="Detail" type="tns:IBUSVariantType"/>
			<xsd:element name="Status" type="tns:IBUSStatusType"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="IBUSHeaderType">
		<xsd:sequence>
			<xsd:element name="Retry" type="tns:RetryType" minOccurs="0"/>
			<xsd:element name="ReplyToStack" type="tns:ReplyToStackType" minOccurs="0" maxOccurs="1"/>
			<xsd:element name="TransactionContext" type="tns:TransactionContextType"/>
			<xsd:element name="systemType" type="xsd:string" minOccurs="0" maxOccurs="1"/>
			<xsd:element name="TestEnvironment" type="tns:TestEnvironmentType" minOccurs="0"/>
			<xsd:element name="TransactionSetHeader" type="tns:TransactionHeaderType" minOccurs="0"/>
			<xsd:element name="BeginningSegment" type="tns:TransactionSegmentType" minOccurs="0"/>
			<xsd:element name="LegacySources" type="tns:SourceType" minOccurs="0"/>
			<xsd:element name="Variables" type="tns:IBUSVariantType" minOccurs="0" maxOccurs="1"/>
			<xsd:element name="RoutingTable" type="tns:RoutingTableType" minOccurs="0" maxOccurs="1"/>
			<xsd:element name="OptionalHeaders" type="tns:IBUSVariantType" minOccurs="0" maxOccurs="1"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="TestEnvironmentType">
		<xsd:sequence>
			<xsd:element name="useStubbedService" type="xsd:string" default="false"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="TransactionContextType">
		<xsd:sequence>
			<xsd:element name="source" type="xsd:string" minOccurs="0"/>
			<xsd:element name="actionName" type="xsd:string"/>
			<xsd:element name="serviceName" type="xsd:string"/>
			<xsd:element name="ActionClass" type="tns:ActionClassType" minOccurs="0"/>
			<xsd:element name="MessageType" type="tns:MessageResponseType" minOccurs="0"/>
			<xsd:element name="processDate" type="xsd:date" minOccurs="0"/>
			<xsd:element name="processTime" type="xsd:time" minOccurs="0"/>
			<xsd:element name="userId" type="xsd:string" minOccurs="0"/>
			<xsd:element name="unitOfWorkId" type="xsd:string" minOccurs="0"/>
			<xsd:element name="operationId" type="xsd:string" minOccurs="0"/>
			<xsd:element name="parentOperationId" type="xsd:string" minOccurs="0"/>
			<xsd:element name="uowGroupIndicator" type="xsd:string" minOccurs="0"/>
			<xsd:element name="uowGroupSize" type="xsd:string" minOccurs="0"/>
			<xsd:element name="transactionId" type="xsd:string" minOccurs="0"/>
			<xsd:element name="responseProtocol" type="xsd:string" minOccurs="0"/>
			<xsd:element name="aggregation" type="xsd:string" minOccurs="0"/>
			<xsd:element name="actionType" type="xsd:string" minOccurs="0"/>
			<xsd:element name="origSource" type="xsd:string" minOccurs="0"/>
			<xsd:element name="origSourceClass" type="xsd:string" minOccurs="0"/>
			<xsd:element name="requestIdentifier" type="xsd:string" minOccurs="0"/>
			<xsd:element name="generatedInterchangeControlNumber" type="xsd:string" minOccurs="0"/>
			<xsd:element name="generatedGroupControlNumber" type="xsd:string" minOccurs="0"/>
			<xsd:element name="generatedTransactionControlNumber" type="xsd:string" minOccurs="0"/>
			<xsd:element name="messageTimeout" type="xsd:string" minOccurs="0"/>
			<xsd:element name="ServiceVersion" type="tns:VersionType" minOccurs="0"/>
			<xsd:element name="IBUSVersion" type="tns:VersionType" fixed="1.1.0"/>
		</xsd:sequence>
	</xsd:complexType>
	<!-- X12 Transactions ONLY -->
	<xsd:complexType name="TransactionHeaderType">
		<xsd:sequence>
			<xsd:element name="transactionSetIdentifierCode" type="xsd:string" minOccurs="0"/>
			<xsd:element name="transactionSetControlNumber" type="xsd:string" minOccurs="0"/>
			<xsd:element name="conventionReferenceNumber" type="xsd:string" minOccurs="0"/>
		</xsd:sequence>
	</xsd:complexType>
	<!-- X12 Transactions ONLY -->
	<xsd:complexType name="TransactionSegmentType">
		<xsd:sequence>
			<xsd:element name="structureCode" type="xsd:string" minOccurs="0"/>
			<xsd:element name="transactionIdentifier" type="xsd:string" minOccurs="0"/>
			<xsd:element name="transactionSetCreationDate" type="xsd:date" minOccurs="0"/>
			<xsd:element name="transactionSetCreationTime" type="xsd:time" minOccurs="0"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="SourceType">
		<xsd:sequence maxOccurs="unbounded">
			<xsd:element name="name" type="xsd:string"/>
			<xsd:element name="action" type="xsd:string"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="IBUSVariantType">
		<xsd:sequence>
			<xsd:any processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="ReplyToStackType">
		<xsd:sequence>
			<xsd:element name="ReplyTo" type="tns:ReplyToStackEntry" minOccurs="0" maxOccurs="unbounded"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="ReplyToStackEntry">
		<xsd:sequence>
			<xsd:element name="replyToQ" type="xsd:string"/>
			<xsd:element name="replyToQMgr" type="xsd:string"/>
			<xsd:element name="requestIdentifier" type="xsd:string"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="IBUSStatusType">
		<xsd:sequence>
			<xsd:element name="code" type="xsd:string"/>
			<xsd:element name="description" type="xsd:string"/>
			<xsd:element name="Messages" type="tns:MessagesType" minOccurs="0"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="MessagesType">
		<xsd:sequence>
			<xsd:element name="Message" type="tns:StatusMessageType" minOccurs="0" maxOccurs="unbounded"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="StatusMessageType">
		<xsd:sequence>
			<xsd:element name="Reason" type="tns:StatusPairType"/>
			<xsd:element name="type" type="xsd:string"/>
			<xsd:element name="FollowUpAction" type="tns:StatusPairType" minOccurs="0"/>
			<xsd:element name="Context" type="tns:StatusPairType" minOccurs="0"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="StatusPairType">
		<xsd:sequence>
			<xsd:element name="description" type="xsd:string"/>
			<xsd:element name="code" type="xsd:string"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:simpleType name="ActionClassType">
		<xsd:restriction base="xsd:string">
			<xsd:enumeration value=""/>
			<xsd:enumeration value="GUI"/>
			<xsd:enumeration value="BATCH"/>
		</xsd:restriction>
	</xsd:simpleType>
	<xsd:simpleType name="MessageResponseType">
		<xsd:restriction base="xsd:string">
			<xsd:enumeration value="ServiceRequest"/>
			<xsd:enumeration value="ServiceResponse"/>
		</xsd:restriction>
	</xsd:simpleType>
	<xsd:simpleType name="VersionType">
		<xsd:restriction base="xsd:string">
			<xsd:pattern value="[0-9]{1,}\.[0-9]{1,}\.[0-9]{1,}"/>
		</xsd:restriction>
	</xsd:simpleType>
	<xsd:complexType name="RoutingTableType">
		<xsd:sequence>
			<xsd:element name="Route" type="tns:RouteType" minOccurs="0" maxOccurs="unbounded"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="RouteType">
		<xsd:sequence>
			<xsd:element name="key" type="xsd:string"/>
			<xsd:element name="routeOverride" type="xsd:string" minOccurs="0"/>
			<xsd:element name="routeAppend" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:complexType name="RetryType">
		<xsd:sequence>
			<xsd:element name="count" type="xsd:long" minOccurs="0"/>
			<xsd:element name="delay" type="xsd:long" minOccurs="0"/>
		</xsd:sequence>
	</xsd:complexType>
</xsd:schema>

我想编组一个IBUSStatusType的对象。为此，我的编组编码如下：

  public static StringWriter getStringFromIBUSStatusType(IBUSStatusType iBUSStatusType) throws JAXBException
  {
    StringWriter stringWriter = new StringWriter();
    JAXBContext jaxbContext = JAXBContext
        .newInstance(com.myhealth.soa.ibus.v1_1.ObjectFactory.class);
    Marshaller marshaller = jaxbContext.createMarshaller();
    marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
    marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper",
        new DefaultNamespacePrefixMapper());
    marshaller.setProperty("com.sun.xml.bind.xmlDeclaration", Boolean.FALSE);
    QName qName = new QName("com.myhealth.soa.ibus.v1_1", "iBUSStatusType");
    JAXBElement<IBUSStatusType> root = new JAXBElement<>(qName, IBUSStatusType.class, iBUSStatusType);
    marshaller.marshal(root, stringWriter);
    return stringWriter;
  }

我在编写IBUSStatusType对象时得到这个xml字符串：

<ns2:iBUSStatusType xmlns:tns="http://soa.myhealth.com/ibus/v1.1.0" xmlns:ns2="com.myhealth.soa.ibus.v1_1"><tns:code>8</tns:code><tns:description>Completed With Warning</tns:description><tns:Messages><tns:Message><tns:Reason><tns:description>Subscriber's email missing</tns:description><tns:code>2187</tns:code></tns:Reason><tns:type>1</tns:type><tns:Context><tns:description>WARN</tns:description><tns:code>Policy=MissingSubscriberEmail</tns:code></tns:Context></tns:Message></tns:Messages></ns2:iBUSStatusType>

好吧，现在我想解组我从marshal进程获得的这个xml字符串。和Unmarshall的代码：

  public static com.myhealth.soa.ibus.v1_1.IBUSStatusType getIBUSStatusType(String xml)
      throws JAXBException
  {
    JAXBContext jaxbContext = JAXBContext
        .newInstance(com.myhealth.soa.ibus.v1_1.ObjectFactory.class);
    Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();     
    return ((JAXBElement<IBUSStatusType>) jaxbUnmarshaller
        .unmarshal(new StringReader(xml))).getValue();
  }

当我对生成的xml字符串进行解组时，我收到此错误：

javax.xml.bind.UnmarshalException: unexpected element (uri:"com.myhealth.soa.ibus.v1_1", local:"iBUSStatusType"). Expected elements are <{http://soa.myhealth.com/ibus/v1.1.0}IBUSMessage>

现在提供我的命名空间是：

put("http://soa.myhealth.com/common/v1", "cmn");
put("http://soa.myhealth.com/MemberService/v1", "mems");
put("http://soa.myhealth.com/ibus/v1.1.0", "tns");
put("http://soa.myhealth.com/member/enrollment/v1", "menr");

Answer 1

只需看看你的架构

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://soa.myhealth.com/ibus/v1.1.0" targetNamespace="http://soa.myhealth.com/ibus/v1.1.0" elementFormDefault="qualified">
    <xsd:element name="IBUSMessage" type="tns:IBUSMessage"/>
    <xsd:complexType name="IBUSMessage">
        <xsd:sequence>
            <xsd:element name="Header" type="tns:IBUSHeaderType"/>
            <xsd:element name="Detail" type="tns:IBUSVariantType"/>
            <xsd:element name="Status" type="tns:IBUSStatusType"/>
        </xsd:sequence>
    </xsd:complexType>

有一个命名空间http://soa.myhealth.com/ibus/v1.1.0当你进行解组时，它需要http://soa.myhealth.com/ibus/v1.1.0，但之前当你进行编组时，你需要放置以下命名空间

QName qName = new QName("com.myhealth.soa.ibus.v1_1", "iBUSStatusType");

它们是不同的。

Answer 2

好吧，最后我们找到了解决方案。我正在粘贴我的解决方案。我确实根据@Iurii更改了代码，但问题出在其他地方。

所以，这是编组部分的变化。 QName的第二个参数必须是类名而不是它的对象。我试着按照这个链接https://codenotfound.com/jaxb-marshal-element-missing-xmlrootelement-annotation.html但没有奏效。将QName的第二个参数更改为Class name后，它就可以了。上下文应该由该类构成，因为ObjectFactory没有它。

    JAXBContext jaxbContext = JAXBContext.newInstance(IBUSStatusType.class);
    
QName qName = new QName("http://soa.independenthealth.com/ibus/v1.1.0", "IBUSStatusType");
    
JAXBElement<IBUSStatusType> root = new JAXBElement<IBUSStatusType>(qName, IBUSStatusType.class, iBUSStatusType);
    

这是整个Unmarshal代码。在取消编组之前，我们必须将xml更改为节点。 Element的导入是import org.w3c.dom.Element;

  public static IBUSStatusType getIBUSStatusType(String xml)
      throws JAXBException, SAXException, IOException, ParserConfigurationException
  {
    JAXBContext jaxbContext = JAXBContext
        .newInstance(IBUSStatusType.class);
    Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();    
    
    Element node =  DocumentBuilderFactory
        .newInstance()
        .newDocumentBuilder()
        .parse(new ByteArrayInputStream(xml.getBytes()))
        .getDocumentElement();
    
    return ((JAXBElement<IBUSStatusType>) jaxbUnmarshaller.unmarshal(node, IBUSStatusType.class)).getValue();
  }