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尝试封送缺少@XmlRootElement的JAXB根对象时出错



我有一个复杂的xml模式，它是国际标准的一部分，因此我无法更改模式文件，并且我使用Maven从中生成JAXB对象。当我试图将数据设置到我的JAXB对象中，然后封送根元素时，我在几个复杂类型上得到了丢失的@XmlRootElement错误。我的问题是如何解决这个问题？环境：

  • JAXB 2.2.2
  • Maven 3.0.3
  • 日蚀朱诺
  • Java 1.6
  • Windows 7 64位

我对网站和本网站进行了广泛的研究，但没有找到我的问题的答案，包括这篇文章：http://weblogs.java.net/blog/kohsuke/archive/2006/03/why_does_jaxb_p.html

以及这个关于堆栈溢出的问题：具有自定义JAX-B绑定的JAX-WS MarshalException：无法封送类型"；java.lang.String"；作为元素，因为它缺少@XmlRootElement注释

我曾尝试在自定义绑定文件中向有问题的类添加注释，但它将注释添加到类以及getContent()方法中，并且该类无法编译。我认为我无论如何都不应该添加这个注释，因为这是一个复杂的类型，是根的一个组件，实际上它嵌套在树中相当深的地方。我已经读到您可以将<xjc:simple/>标记添加到全局绑定元素，但我已经向全局绑定元素添加了许多属性，当我这样做时，它不会编译。

有人能帮我指出正确的方向吗？这可能是我构建JAXB对象时的错误吗？我已经在调试器中完成了它，当包com.sun.xml.bind.v2.runtime.properties中的ArrayReferenceNodeProperty类试图序列化列表体时，并且当它获得这些类的JaxBeanInfo时，没有设置dom处理程序，jaxbType也不是对象，所以它认为它需要是根。

我没有在基于web的服务中使用它，除了在绑定文件中进行调整以解决命名冲突之外，还没有创建任何自定义类或绑定。

这是顶级模式文件：

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="qualified">
<xs:annotation>
<xs:documentation>
*****************************************************************************
*                                                                           *
*                        S1000D Issue 3                                     *
*                          XML Schema                                       *
*                                                                           *
*                     Release Version 3.0                                   *
*                       Date: 2007-07-31                                    *
*                                                                           *
*                                                                           *
* The following attribute definition on the root element may be used to     *
* call this set of declarations:-                                           *
*                                                                           *
* xsi:noNamespaceSchemaLocation=                                            *
* "http://www.s1000d.org/S1000D_3-0/xml_schema_master/dm/procedSchema.xsd"  *
*****************************************************************************
</xs:documentation>
</xs:annotation>
<xs:redefine schemaLocation="elementGroups.xsd">
<xs:group name="APPLIC">
<xs:choice>
<xs:sequence>
<xs:element ref="displaytext"/> 
<xs:choice minOccurs="0">
<xs:element ref="assert"/>
<xs:element ref="evaluate"/>
</xs:choice>
</xs:sequence>
<xs:choice>
<xs:element ref="assert"/>
<xs:element ref="evaluate"/>
</xs:choice>
</xs:choice>
</xs:group>
<xs:group name="NPAR">
<xs:sequence>
<xs:group ref="WC"/>
<xs:group ref="NPFFT" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:group>
<xs:group name="NPFFT">
<xs:choice>
<xs:group ref="NP"/>
<xs:group ref="FFT"/>
</xs:choice>
</xs:group>
<xs:group name="paracon">
<xs:choice>
<xs:group ref="text"/>
<xs:group ref="list"/>
</xs:choice>
</xs:group>
<xs:group name="text">
<xs:choice>
<xs:element ref="ein"/>
<xs:element ref="cb"/>
<xs:element ref="parasigdata"/>
<xs:element ref="quantity"/>
<xs:element ref="xref"/>
<xs:element ref="indxflag"/>
<xs:element ref="change"/>
<xs:element ref="emphasis"/>
<xs:element ref="symbol"/>
<xs:element ref="subscrpt"/>
<xs:element ref="supscrpt"/>
<xs:element ref="refdm"/>
<xs:element ref="reftp"/>
<xs:element ref="ftnote"/>
<xs:element ref="ftnref"/>
<xs:element ref="acronym"/>
<xs:element ref="acroterm"/>
<xs:element ref="capgrp"/>
</xs:choice>
</xs:group>
<xs:group name="TEXT-NOREFS">
<xs:choice>
<xs:element ref="xref"/>
<xs:element ref="indxflag"/>
<xs:element ref="symbol"/>
<xs:element ref="subscrpt"/>
<xs:element ref="supscrpt"/>
<xs:element ref="ftnref"/>
<xs:element ref="acronym"/>
<xs:element ref="acroterm"/>
</xs:choice>
</xs:group>
<xs:group name="STEP1">
<xs:sequence>
<xs:element ref="step1"/>
</xs:sequence>
</xs:group>
<xs:group name="STEP2">
<xs:sequence>
<xs:element ref="step2"/>
</xs:sequence>
</xs:group>
<xs:group name="STEP3">
<xs:sequence>
<xs:element ref="step3"/>
</xs:sequence>
</xs:group>
<xs:group name="STEP4">
<xs:sequence>
<xs:element ref="step4"/>
</xs:sequence>
</xs:group>
<xs:group name="STEP5">
<xs:sequence>
<xs:element ref="step5"/>
</xs:sequence>
</xs:group>
<xs:group name="STEP6">
<xs:sequence>
<xs:element ref="step6"/>
</xs:sequence>
</xs:group>
<xs:group name="STEP7">
<xs:sequence>
<xs:element ref="step7"/>
</xs:sequence>
</xs:group>
<xs:group name="STEP8">
<xs:sequence>
<xs:element ref="step8"/>
</xs:sequence>
</xs:group>
</xs:redefine>
<xs:redefine schemaLocation="complexTypes.xsd">
<xs:complexType name="contentType">
<xs:complexContent>
<xs:restriction base="contentType">
<xs:sequence>
<xs:element ref="refs" minOccurs="0"/>
<xs:element ref="proced"/>
</xs:sequence>
<xs:attribute ref="id"/>
</xs:restriction>
</xs:complexContent>
</xs:complexType>
</xs:redefine>
<xs:element name="dmodule" type="dmoduleType"/>

对于xrefType，我只设置两个属性，对于refdmType，我仅设置另一个属于ALLDMC组的复杂类型。错误的两种复杂类型的代码是：

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" elementFormDefault="qualified" attributeFormDefault="qualified">
<xs:import namespace="http://www.w3.org/1999/02/22-rdf-syntax-ns#" schemaLocation="rdf.xsd"/>
<xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="xlink.xsd"/>
<xs:include schemaLocation="attributeGroups.xsd"/>
<xs:include schemaLocation="simpleElements.xsd"/>
<xs:include schemaLocation="complexElements.xsd"/>
<xs:include schemaLocation="elementGroups.xsd"/>
<xs:complexType name="refdmType">
<xs:choice>
<xs:sequence>
<xs:element ref="applic" minOccurs="0"/>
<xs:element ref="dmcextension" minOccurs="0"/>
<xs:group ref="ALLDMC"/>
<xs:element ref="issno" minOccurs="0"/>
<xs:element ref="dmtitle" minOccurs="0"/>
<xs:element ref="language" minOccurs="0"/>
</xs:sequence>
<xs:group ref="xlink:XLINKEXT" minOccurs="0" maxOccurs="unbounded"/>
</xs:choice>
<xs:attribute ref="target"/>
<xs:attribute ref="refapplic"/>
<xs:attributeGroup ref="bodyatt"/>
<xs:attributeGroup ref="cntlcontent"/>
<xs:attributeGroup ref="xlink:XLINKATT"/>
</xs:complexType>
<xs:complexType name="xrefType" mixed="true">
<xs:sequence>
<xs:element ref="applic" minOccurs="0"/>
<xs:group ref="SPARCON" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="xrefid"/>
<xs:attribute ref="xidtype"/>
<xs:attribute ref="target"/>
<xs:attribute ref="destitle"/>
<xs:attribute ref="pretext"/>
<xs:attribute ref="posttext"/>
<xs:attribute ref="refapplic"/>
<xs:attributeGroup ref="cntlcontent"/>
<xs:attributeGroup ref="xlink:XLINKATT3"/>
</xs:complexType>
</xs:schema>

这里是JAXB生成的类的主要部分。为了节省空间，我删除了大部分getter和setter：RefdmType:

/**
* <p>Java class for refdmType complex type.
* 
* <p>The following schema fragment specifies the expected content contained within this class.
* 
* <pre>
* &lt;complexType name="refdmType">
*   &lt;complexContent>
*     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
*       &lt;choice>
*         &lt;sequence>
*           &lt;element ref="{}applic" minOccurs="0"/>
*           &lt;element ref="{}dmcextension" minOccurs="0"/>
*           &lt;group ref="{}ALLDMC"/>
*           &lt;element ref="{}issno" minOccurs="0"/>
*           &lt;element ref="{}dmtitle" minOccurs="0"/>
*           &lt;element ref="{}language" minOccurs="0"/>
*         &lt;/sequence>
*         &lt;group ref="{http://www.w3.org/1999/xlink}XLINKEXT" maxOccurs="unbounded" minOccurs="0"/>
*       &lt;/choice>
*       &lt;attGroup ref="{http://www.w3.org/1999/xlink}XLINKATT"/>
*       &lt;attGroup ref="{}cntlcontent"/>
*       &lt;attGroup ref="{}bodyatt"/>
*       &lt;attribute ref="{}target"/>
*       &lt;attribute ref="{}refapplic"/>
*     &lt;/restriction>
*   &lt;/complexContent>
* &lt;/complexType>
* </pre>
* 
* 
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "refdmType", propOrder = {
"applicAndDmcextensionAndAge"
})
public class RefdmType implements Serializable
{
private final static long serialVersionUID = 1L;
@XmlElements({
@XmlElement(name = "applic", type = ApplicType.class),
@XmlElement(name = "dmcextension", type = DmcextensionType.class),
@XmlElement(name = "age", type = AgeType.class),
@XmlElement(name = "avee", type = AveeType.class),
@XmlElement(name = "issno", type = IssnoType.class),
@XmlElement(name = "dmtitle", type = DmtitleType.class),
@XmlElement(name = "language", type = LanguageType.class),
@XmlElement(name = "resource", namespace = "http://www.w3.org/1999/xlink", type = Resource.class),
@XmlElement(name = "locator", namespace = "http://www.w3.org/1999/xlink", type = Locator.class),
@XmlElement(name = "arc", namespace = "http://www.w3.org/1999/xlink", type = Arc.class)
})
protected List<Serializable> applicAndDmcextensionAndAge;
@XmlAttribute(name = "target")
protected String target;
@XmlAttribute(name = "refapplic")
@XmlIDREF
@XmlSchemaType(name = "IDREF")
protected Object refapplic;
@XmlAttribute(name = "type", namespace = "http://www.w3.org/1999/xlink")
@XmlJavaTypeAdapter(CollapsedStringAdapter.class)
protected String type;
@XmlAttribute(name = "href", namespace = "http://www.w3.org/1999/xlink")
protected String href;
@XmlAttribute(name = "title", namespace = "http://www.w3.org/1999/xlink")
protected String title;
@XmlAttribute(name = "show", namespace = "http://www.w3.org/1999/xlink")
@XmlJavaTypeAdapter(CollapsedStringAdapter.class)
protected String show;
@XmlAttribute(name = "actuate", namespace = "http://www.w3.org/1999/xlink")
@XmlJavaTypeAdapter(CollapsedStringAdapter.class)
protected String actuate;
@XmlAttribute(name = "authname")
protected String authname;
@XmlAttribute(name = "authdoc")
protected String authdoc;
@XmlAttribute(name = "id")
@XmlJavaTypeAdapter(CollapsedStringAdapter.class)
@XmlID
@XmlSchemaType(name = "ID")
protected String id;
@XmlAttribute(name = "level")
@XmlSchemaType(name = "nonNegativeInteger")
protected BigInteger level;
@XmlAttribute(name = "mark")
@XmlSchemaType(name = "nonNegativeInteger")
protected BigInteger mark;
@XmlAttribute(name = "change")
protected ChangeType change;
@XmlAttribute(name = "rfc")
protected String rfc;
/**
* Gets the value of the applicAndDmcextensionAndAge 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 applicAndDmcextensionAndAge property.
* 
* <p>
* For example, to add a new item, do as follows:
* <pre>
*    getApplicAndDmcextensionAndAge().add(newItem);
* </pre>
* 
* 
* <p>
* Objects of the following type(s) are allowed in the list
* {@link ApplicType }
* {@link DmcextensionType }
* {@link AgeType }
* {@link AveeType }
* {@link IssnoType }
* {@link DmtitleType }
* {@link LanguageType }
* {@link Resource }
* {@link Locator }
* {@link Arc }
* 
* 
*/
public List<Serializable> getApplicAndDmcextensionAndAge() {
if (applicAndDmcextensionAndAge == null) {
applicAndDmcextensionAndAge = new ArrayList<Serializable>();
}
return this.applicAndDmcextensionAndAge;
}
}

外部参照类型：

/**
* <p>Java class for xrefType complex type.
* 
* <p>The following schema fragment specifies the expected content contained within    this class.
* 
* <pre>
* &lt;complexType name="xrefType">
*   &lt;complexContent>
*     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
*       &lt;sequence>
*         &lt;element ref="{}applic" minOccurs="0"/>
*         &lt;group ref="{}SPARCON" maxOccurs="unbounded" minOccurs="0"/>
*       &lt;/sequence>
*       &lt;attGroup ref="{}cntlcontent"/>
*       &lt;attGroup ref="{http://www.w3.org/1999/xlink}XLINKATT3"/>
*       &lt;attribute ref="{}xrefid"/>
*       &lt;attribute ref="{}xidtype"/>
*       &lt;attribute ref="{}target"/>
*       &lt;attribute ref="{}destitle"/>
*       &lt;attribute ref="{}pretext"/>
*       &lt;attribute ref="{}posttext"/>
*       &lt;attribute ref="{}refapplic"/>
*     &lt;/restriction>
*   &lt;/complexContent>
* &lt;/complexType>
* </pre>
* 
* 
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "xrefType", propOrder = {
"content"
})
public class XrefType implements Serializable
{
private final static long serialVersionUID = 1L;
@XmlElementRefs({
@XmlElementRef(name = "supscrpt", type = JAXBElement.class),
@XmlElementRef(name = "subscrpt", type = JAXBElement.class),
@XmlElementRef(name = "applic", type = JAXBElement.class)
})
@XmlMixed
protected List<Serializable> content;
@XmlAttribute(name = "xrefid")
@XmlJavaTypeAdapter(Adapter5 .class)
@XmlSchemaType(name = "IDREF")
protected String xrefid;
@XmlAttribute(name = "xidtype")
protected XidtypeType xidtype;
@XmlAttribute(name = "target")
protected String target;
@XmlAttribute(name = "destitle")
protected String destitle;
@XmlAttribute(name = "pretext")
protected String pretext;
@XmlAttribute(name = "posttext")
protected String posttext;
@XmlAttribute(name = "refapplic")
@XmlIDREF
@XmlSchemaType(name = "IDREF")
protected Object refapplic;
@XmlAttribute(name = "authname")
protected String authname;
@XmlAttribute(name = "authdoc")
protected String authdoc;
@XmlAttribute(name = "type", namespace = "http://www.w3.org/1999/xlink")
@XmlJavaTypeAdapter(CollapsedStringAdapter.class)
protected String type;
@XmlAttribute(name = "href", namespace = "http://www.w3.org/1999/xlink")
protected String href;
@XmlAttribute(name = "title", namespace = "http://www.w3.org/1999/xlink")
protected String title;
@XmlAttribute(name = "show", namespace = "http://www.w3.org/1999/xlink")
@XmlJavaTypeAdapter(CollapsedStringAdapter.class)
protected String show;
@XmlAttribute(name = "actuate", namespace = "http://www.w3.org/1999/xlink")
@XmlJavaTypeAdapter(CollapsedStringAdapter.class)
protected String actuate;
/**
* Gets the value of the content 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 content property.
* 
* <p>
* For example, to add a new item, do as follows:
* <pre>
*    getContent().add(newItem);
* </pre>
* 
* 
* <p>
* Objects of the following type(s) are allowed in the list
* {@link String }
* {@link JAXBElement }{@code <}{@link String }{@code >}
* {@link JAXBElement }{@code <}{@link ApplicType }{@code >}
* {@link JAXBElement }{@code <}{@link String }{@code >}
* 
* 
*/
public List<Serializable> getContent() {
if (content == null) {
content = new ArrayList<Serializable>();
}
return this.content;
}
}

最后是我的自定义绑定文件：

<jxb:bindings version="1.0" xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:annox="http://annox.dev.java.net"
xsi:schemaLocation="http://java.sun.com/xml/ns/jaxb http://java.sun.com/xml/ns/jaxb/bindingschema_2_0.xsd">
<jxb:globalBindings typesafeEnumMemberName="generateName"
typesafeEnumMaxMembers="1500" collectionType="java.util.ArrayList"
generateValueClass="true" choiceContentProperty="true">
<xjc:serializable uid="1" />
</jxb:globalBindings>
<jxb:bindings schemaLocation="simpleTypes.xsd" node="/xs:schema">
<jxb:bindings node="//xs:simpleType[@name='YEAR']">
<jxb:javaType name="java.lang.Integer" />
</jxb:bindings>
<jxb:bindings node="//xs:simpleType[@name='DAY']">
<jxb:javaType name="java.lang.String" />
</jxb:bindings>
<jxb:bindings node="//xs:simpleType[@name='MONTH']">
<jxb:javaType name="java.lang.String" />
</jxb:bindings>
<jxb:bindings node="//xs:simpleType[@name='issnovalueType']">
<jxb:javaType name="java.lang.String" />
</jxb:bindings>
</jxb:bindings>
<jxb:bindings schemaLocation="attributes.xsd" node="/xs:schema">
<jxb:bindings node="xs:attribute[@name='inwork']">
<jxb:property>
<jxb:baseType>
<jxb:javaType name="java.lang.String" />
</jxb:baseType>
</jxb:property>
</jxb:bindings>
<jxb:bindings node="//xs:attribute[@name='xrefid']">
<jxb:property>
<jxb:baseType>
<jxb:javaType name="java.lang.String" />
</jxb:baseType>
</jxb:property>
</jxb:bindings>
</jxb:bindings>
<jxb:bindings schemaLocation="complexTypes.xsd" node="/xs:schema">
<jxb:bindings node="xs:complexType[@name='dmoduleType']">
<annox:annotate>
<annox:annotate annox:class="javax.xml.bind.annotation.XmlRootElement"
name="dmodule" />
</annox:annotate>
</jxb:bindings>
<jxb:bindings node="//xs:complexType[@name='skillType']">
<jxb:class name="SkillTypeComplex" />
</jxb:bindings>
<!--<jxb:bindings node="//xs:complexType[@name='xrefType']">
<annox:annotate>
<annox:annotate annox:class="javax.xml.bind.annotation.XmlRootElement"
name="xref" />
</annox:annotate>
<jxb:bindings node=".//xs:sequence//xs:element[@ref='applic']">
<jxb:property name="xrefApplic"/>
</jxb:bindings>
</jxb:bindings>-->
</jxb:bindings>
<jxb:bindings schemaLocation="elementGroups.xsd" node="//xs:group[@name='APPLIC']">
<jxb:bindings node=".//xs:choice//xs:sequence">
<jxb:bindings node=".//xs:choice">
<jxb:property name="assertEvalChoice" />
</jxb:bindings>
</jxb:bindings>
</jxb:bindings>
<jxb:bindings schemaLocation="dc.xsd" node="/xs:schema">
<jxb:bindings node="//xs:element[@name='language']">
<jxb:class name="DcLanguage" />
</jxb:bindings>
<jxb:bindings node="//xs:element[@name='subject']">
<jxb:class name="DcSubject" />
</jxb:bindings>
<jxb:bindings node="//xs:element[@name='title']">
<jxb:class name="DcTitle" />
</jxb:bindings>
</jxb:bindings>
</jxb:bindings>

如果能从高层角度了解为什么会发生这种情况，并就如何解决这种情况提出建议，我们将不胜感激。我使用JAXB才几个月，并不是一个专家。非常感谢。

这是我看到的错误：

javax.xml.bind.MarshalException-具有链接的异常：[com.sun.istack.SAXException2:无法将类型"com.synesis7exporter.domain.s100d.dm.common.XrefType"封送为元素，因为它缺少@XmlRootElement注释]位于com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:323)位于com.sun.xml.bind.v2.runtime.MarshallerImpl.marshall(MarshallerImpl.java:249)位于javax.xml.bind.helpers.AbstractMarshallerImpl.marshall(AbstractMarshallrImpl.java:96)网址：com.synesis7exporter.client.s100d.procedure.S7ProceduralRunnable.writeToXml(S7ProceduralRunable.java:142)网址：com.synesis7exporter.client.s100d.procedure.S7ProceduralRunnable.createProceduralDm(S7ProceduralRunable.java:118)网址：com.synesis7exporter.client.s100d.procedure.S7ProceduralRunnable.run(S7ProceduralRunable.java:93)网址：com.synesis7exporter.S7ExporterController.processProceduralDms(S7ExporterCntroller.java:235)网址：com.synesis7exporter.S7ExporterController.exportSchema(S7ExporterCntroller.java:118)网址：com.synesis7exporter.s7exporter.initializeExporter(s7exporter.java:58)网址：com.synesis7exporter.s7exporter.main(s7exporter.java:38)导致原因：com.sun.istack.SAXException2：无法将类型"com.synesis7exporter.domain.s100d.dm.common.XrefType"封送为元素，因为它缺少@XmlRootElement注释在com.sun.xml.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:252)位于com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeRoot(ClassBeanInfoImpl.java:324)位于com.sun.xml.bind.v2.runtime.properties.ArrayReferenceNodeProperty.serializeListBody(ArrayReferenceodeProperty.java:118)位于com.sun.xml.bind.v2.runtime.properties.ArrayERProperty.serializeBody(ArrayERProperty.java:159)位于com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:344)位于com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:700)在com.sun.xml.bind.v2.runtime.properties.ArrayElementNodeProperty.serializeItem(ArrayElementNodeAttribute.java:69)位于com.sun.xml.bind.v2.runtime.properties.ArrayElementProperty.serializeListBody(ArrayElementProperty.java:172)位于com.sun.xml.bind.v2.runtime.properties.ArrayERProperty.serializeBody(ArrayERProperty.java:159)位于com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:344)位于com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:700)在com.sun.xml.bind.v2.runtime.properties.ArrayElementNodeProperty.serializeItem(ArrayElementNodeAttribute.java:69)位于com.sun.xml.bind.v2.runtime.properties.ArrayElementProperty.serializeListBody(ArrayElementProperty.java:172)位于com.sun.xml.bind.v2.runtime.properties.ArrayERProperty.serializeBody(ArrayERProperty.java:159)位于com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:344)位于com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:700)在com.sun.xml.bind.v2.runtime.properties.ArrayElementNodeProperty.serializeItem(ArrayElementNodeAttribute.java:69)位于com.sun.xml.bind.v2.runtime.properties.ArrayElementProperty.serializeListBody(ArrayElementProperty.java:172)位于com.sun.xml.bind.v2.runtime.properties.ArrayERProperty.serializeBody(ArrayERProperty.java:159)位于com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:344)位于com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:700)在com.sun.xml.bind.v2.runtime.properties.SingleElementNodeProperty.serializeBody(SingleElementNodeAttribute.java:156)位于com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:344)位于com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:700)在com.sun.xml.bind.v2.runtime.properties.SingleElementNodeProperty.serializeBody(SingleElementNodeAttribute.java:156)位于com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:344)位于com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:338)位于com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:700)在com.sun.xml.bind.v2.runtime.properties.SingleElementNodeProperty.serializeBody(SingleElementNodeAttribute.java:156)位于com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:344)位于com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:700)在com.sun.xml.bind.v2.runtime.properties.SingleElementNodeProperty.serializeBody(SingleElementNodeAttribute.java:156)在com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl$1.serializeBody(ElementBeanInfoImpl.java:161)在com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl$1.serializeBody(ElementBeanInfoImpl.java:193)位于com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeBody(ElementBeanInfoImpl.java:321)位于com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeRoot(ElementBeanInfoImpl.java:328)位于com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeRoot(ElementBeanInfoImpl.java:76)位于com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:498)位于com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:320)…还有9个

您可以将对象包装在JAXBElement的实例中，以提供根元素信息。如果您从XML模式生成模型，那么在生成的ObjectFactory类上有一些方便的方法。

有关更多信息

  • http://blog.bdoughan.com/2012/07/jaxb-and-root-elements.html

您可以使用ObjectFactory类来解决没有@XmlRootElement的类的问题。ObjectFactory有重载的方法来将其封装在JAXBElement中方法：1简单地创建对象，方法2将用@JAXBElement包装对象。始终使用方法：2以避免javax.xml.bind.MarshalException-链接的异常缺少@XmlRootElement注释

方法：1

public GetCountry createGetCountry() {
return new GetCountry();
}

方法：2

@XmlElementDecl(namespace = "my/name/space", name = "getCountry")
public JAXBElement<GetCountry> createGetCountry(GetCountry value) {
return new JAXBElement<GetCountry>(_GetCountry_QNAME, GetCountry.class, null, value);
}

希望这会有所帮助。。。

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