对象必须在其@XmlValue 字段中有一些值
Object must have some value in its @XmlValue field
我有以下代码
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "udt_TextType", propOrder = { "value" })
@XmlSeeAlso({ RoadTypeCodeTypeType.class })
public class UdtTextType {
@XmlValue
@XmlJavaTypeAdapter(NormalizedStringAdapter.class)
@XmlSchemaType(name = "normalizedString")
protected String value;
/**
* Gets the value of the value property.
*
* @return possible object is {@link String }
*
*/
public String getValue() {
return value;
}
/**
* Sets the value of the value property.
*
* @param value
* allowed object is {@link String }
*
*/
public void setValue(String value) {
this.value = value;
}
当我尝试整理这个对象时：
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "AdresseCompleteType", propOrder = { "inHouseMail", "buildingName", "buildingNumber", "blockName", "roadType",
"streetName", "postcode", "cityName", "lineFive" })
public class AdresseCompleteType {
@XmlElement(name = "InHouseMail")
protected UdtTextType inHouseMail;
@XmlElement(name = "BuildingName")
protected UdtTextType buildingName;
@XmlElement(name = "BuildingNumber")
protected UdtTextType buildingNumber;
...
我有以下错误：
对象必须在其@XmlValue 字段中有一些值
为什么会出现此错误？
com.sun.xml.internal.bind.api.AccessorException: Object must have some value in its @XmlValue field: fr.company.jaxb.UdtTextType@17f2dd8] at
fr.company.Service.launchXML(Service.java:303) at
fr.company.Service.launchZIP(Service.java:370) at
fr.company.MainTest.testGenerationZip(MainTest.java:17) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57))
谢谢！
以下解释了您出现异常的原因：
Java型号
以下是您的模型的简化版本，用于演示该问题：
UdtTextType
这个 class 有一个用 @XmlValue 注释的字段：
import javax.xml.bind.annotation.*;
@XmlAccessorType(XmlAccessType.FIELD)
public class UdtTextType {
@XmlValue
protected String value;
public void setValue(String value) {
this.value = value;
}
}
AdreseCompleteType
需要注意的重要一点是 inHouseMail 字段是一个与 @XmlValue 有映射关系的类型。
import javax.xml.bind.annotation.*;
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class AdreseCompleteType {
@XmlElement(name = "InHouseMail")
protected UdtTextType inHouseMail;
public void setInHouseMail(UdtTextType inHouseMail) {
this.inHouseMail = inHouseMail;
}
}
XML 代表
让我们检查对象模型可能产生的不同 XML 表示。
#1 - inHouseMail 属性 是 null
AdreseCompleteType adreseCompleteType = new AdreseCompleteType();
adreseCompleteType.setInHouseMail(null);
在 XML 表示中，inHouseMail 字段应该是 null 我不在结果 XML.
中包含该元素
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<adreseCompleteType/>
#2 - inHouseMail 属性 已设置且 UdtTextType 具有值
UdtTextType udtTextType = new UdtTextType();
udtTextType.setValue("Hello World");
AdreseCompleteType adreseCompleteType = new AdreseCompleteType();
adreseCompleteType.setInHouseMail(udtTextType);
由于设置了 inHouseMail 字段，我们得到了 InHouseMail 元素，并且由于它的 value 字段被填充，所以也被输出。
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<adreseCompleteType>
<InHouseMail>Hello World</InHouseMail>
</adreseCompleteType>
#3 - inHouseMail 属性 已设置且 UdtTextType 具有空字符串值
UdtTextType udtTextType = new UdtTextType();
udtTextType.setValue("");
AdreseCompleteType adreseCompleteType = new AdreseCompleteType();
adreseCompleteType.setInHouseMail(udtTextType);
由于设置了 inHouseMail 字段，我们得到了 InHouseMail 元素，并且由于它的 value 字段被填充为空 String，输出为空元素.
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<adreseCompleteType>
<InHouseMail></InHouseMail>
</adreseCompleteType>
#4 - inHouseMail 属性 已设置并且 UdtTextType 具有 null 值
UdtTextType udtTextType = new UdtTextType();
udtTextType.setValue(null);
AdreseCompleteType adreseCompleteType = new AdreseCompleteType();
adreseCompleteType.setInHouseMail(udtTextType);
问题是这个 XML 应该是什么样子。它不能是像#3 这样的空元素，因为 JAXB（和 XML）不会将 null 表示为空元素。它也不能表示为缺少的 InHouseMail 元素，因为那样会与场景 #1 发生冲突。所以抛出以下异常：
Exception in thread "main" javax.xml.bind.MarshalException
- with linked exception:
[com.sun.istack.internal.SAXException2: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5
com.sun.xml.internal.bind.api.AccessorException: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5]
at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:311)
at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:236)
at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:95)
at forum28411016.Demo.main(Demo.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: com.sun.istack.internal.SAXException2: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5
com.sun.xml.internal.bind.api.AccessorException: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:235)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:250)
at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:347)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsSoleContent(XMLSerializer.java:582)
at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeRoot(ClassBeanInfoImpl.java:325)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:483)
at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:308)
... 8 more
Caused by: com.sun.xml.internal.bind.api.AccessorException: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5
at com.sun.xml.internal.bind.v2.model.impl.RuntimeClassInfoImpl$TransducerImpl.writeLeafElement(RuntimeClassInfoImpl.java:395)
at com.sun.xml.internal.bind.v2.runtime.reflect.TransducedAccessor$CompositeTransducedAccessorImpl.writeLeafElement(TransducedAccessor.java:239)
at com.sun.xml.internal.bind.v2.runtime.property.SingleElementLeafProperty.serializeBody(SingleElementLeafProperty.java:114)
at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:343)
... 12 more
我有以下代码
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "udt_TextType", propOrder = { "value" })
@XmlSeeAlso({ RoadTypeCodeTypeType.class })
public class UdtTextType {
@XmlValue
@XmlJavaTypeAdapter(NormalizedStringAdapter.class)
@XmlSchemaType(name = "normalizedString")
protected String value;
/**
* Gets the value of the value property.
*
* @return possible object is {@link String }
*
*/
public String getValue() {
return value;
}
/**
* Sets the value of the value property.
*
* @param value
* allowed object is {@link String }
*
*/
public void setValue(String value) {
this.value = value;
}
当我尝试整理这个对象时：
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "AdresseCompleteType", propOrder = { "inHouseMail", "buildingName", "buildingNumber", "blockName", "roadType",
"streetName", "postcode", "cityName", "lineFive" })
public class AdresseCompleteType {
@XmlElement(name = "InHouseMail")
protected UdtTextType inHouseMail;
@XmlElement(name = "BuildingName")
protected UdtTextType buildingName;
@XmlElement(name = "BuildingNumber")
protected UdtTextType buildingNumber;
...
我有以下错误： 对象必须在其@XmlValue 字段中有一些值
为什么会出现此错误？
com.sun.xml.internal.bind.api.AccessorException: Object must have some value in its @XmlValue field: fr.company.jaxb.UdtTextType@17f2dd8] at
fr.company.Service.launchXML(Service.java:303) at
fr.company.Service.launchZIP(Service.java:370) at
fr.company.MainTest.testGenerationZip(MainTest.java:17) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57))
谢谢！
以下解释了您出现异常的原因：
Java型号
以下是您的模型的简化版本，用于演示该问题：
UdtTextType
这个 class 有一个用 @XmlValue 注释的字段：
import javax.xml.bind.annotation.*;
@XmlAccessorType(XmlAccessType.FIELD)
public class UdtTextType {
@XmlValue
protected String value;
public void setValue(String value) {
this.value = value;
}
}
AdreseCompleteType
需要注意的重要一点是 inHouseMail 字段是一个与 @XmlValue 有映射关系的类型。
import javax.xml.bind.annotation.*;
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class AdreseCompleteType {
@XmlElement(name = "InHouseMail")
protected UdtTextType inHouseMail;
public void setInHouseMail(UdtTextType inHouseMail) {
this.inHouseMail = inHouseMail;
}
}
XML 代表
让我们检查对象模型可能产生的不同 XML 表示。
#1 - inHouseMail 属性 是 null
AdreseCompleteType adreseCompleteType = new AdreseCompleteType();
adreseCompleteType.setInHouseMail(null);
在 XML 表示中，inHouseMail 字段应该是 null 我不在结果 XML.
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<adreseCompleteType/>
#2 - inHouseMail 属性 已设置且 UdtTextType 具有值
UdtTextType udtTextType = new UdtTextType();
udtTextType.setValue("Hello World");
AdreseCompleteType adreseCompleteType = new AdreseCompleteType();
adreseCompleteType.setInHouseMail(udtTextType);
由于设置了 inHouseMail 字段，我们得到了 InHouseMail 元素，并且由于它的 value 字段被填充，所以也被输出。
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<adreseCompleteType>
<InHouseMail>Hello World</InHouseMail>
</adreseCompleteType>
#3 - inHouseMail 属性 已设置且 UdtTextType 具有空字符串值
UdtTextType udtTextType = new UdtTextType();
udtTextType.setValue("");
AdreseCompleteType adreseCompleteType = new AdreseCompleteType();
adreseCompleteType.setInHouseMail(udtTextType);
由于设置了 inHouseMail 字段，我们得到了 InHouseMail 元素，并且由于它的 value 字段被填充为空 String，输出为空元素.
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<adreseCompleteType>
<InHouseMail></InHouseMail>
</adreseCompleteType>
#4 - inHouseMail 属性 已设置并且 UdtTextType 具有 null 值
UdtTextType udtTextType = new UdtTextType();
udtTextType.setValue(null);
AdreseCompleteType adreseCompleteType = new AdreseCompleteType();
adreseCompleteType.setInHouseMail(udtTextType);
问题是这个 XML 应该是什么样子。它不能是像#3 这样的空元素，因为 JAXB（和 XML）不会将 null 表示为空元素。它也不能表示为缺少的 InHouseMail 元素，因为那样会与场景 #1 发生冲突。所以抛出以下异常：
Exception in thread "main" javax.xml.bind.MarshalException
- with linked exception:
[com.sun.istack.internal.SAXException2: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5
com.sun.xml.internal.bind.api.AccessorException: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5]
at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:311)
at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:236)
at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:95)
at forum28411016.Demo.main(Demo.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: com.sun.istack.internal.SAXException2: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5
com.sun.xml.internal.bind.api.AccessorException: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:235)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:250)
at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:347)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsSoleContent(XMLSerializer.java:582)
at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeRoot(ClassBeanInfoImpl.java:325)
at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:483)
at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:308)
... 8 more
Caused by: com.sun.xml.internal.bind.api.AccessorException: Object must have some value in its @XmlValue field: forum28411016.UdtTextType@f7ca0f5
at com.sun.xml.internal.bind.v2.model.impl.RuntimeClassInfoImpl$TransducerImpl.writeLeafElement(RuntimeClassInfoImpl.java:395)
at com.sun.xml.internal.bind.v2.runtime.reflect.TransducedAccessor$CompositeTransducedAccessorImpl.writeLeafElement(TransducedAccessor.java:239)
at com.sun.xml.internal.bind.v2.runtime.property.SingleElementLeafProperty.serializeBody(SingleElementLeafProperty.java:114)
at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:343)
... 12 more