我最近一直在玩JAXB / MOXy，并且它在我的所有测试和示例代码上运行良好。我专门使用绑定文件，这就是我使用MOXy的原因。
请注意，在我的所有示例中，我从不使用ObjectFactory，也不使用jaxb.index，并且它的工作效果很好。
当我回到我的公司时，我得到一个令人讨厌的JAXB异常，说我的包不包含ObjectFactory或jaxb.index。
我的项目还调用了Spring和Hibernate，JUnit和DBUnit。
以下是一些示例代码：我有一个名为AContributionPhysicalSupport的抽象类。
package org.pea.openVillages.pojo.contribution.implementation;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.DiscriminatorColumn;
import javax.persistence.DiscriminatorType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.Table;
@Entity
@Table(name = "TOV_CONTRIBUTION_PHYSICAL_SUPPORT")
@Inheritance(strategy = InheritanceType.JOINED)
@DiscriminatorColumn(name = "SUPPORT_TYPE", discriminatorType = DiscriminatorType.STRING, length = 20)
public abstract class AContributionPhysicalSupport implements Serializable
{
/* *****************************************************************
*
* PROPERTIES
*
* *****************************************************************
*/
/**
* for Serializable
*/
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "SUPPORT_ID")
private Long physicalSupportId;
@Column(name = "SUPPORT_TYPE", nullable = false, length = 20, updatable = false, insertable = false)
private String supportType;
/* *****************************************************************
*
* CONSTRUCTORS
*
* *****************************************************************
*/
public AContributionPhysicalSupport()
{
}
/* *****************************************************************
*
* GETTERS AND SETTERS
*
* *****************************************************************
*/
/**
* @return the physicalSupportId
*/
public Long getPhysicalSupportId()
{
return physicalSupportId;
}
/**
* @param physicalSupportId
* the physicalSupportId to set
*/
public void setPhysicalSupportId(Long physicalSupportId)
{
this.physicalSupportId = physicalSupportId;
}
/**
* @return the supportType
*/
public String getSupportType()
{
return supportType;
}
/**
* @param supportType
* the supportType to set
*/
public void setSupportType(String supportType)
{
this.supportType = supportType;
}
/* *****************************************************************
*
* UTILS
*
* *****************************************************************
*/
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString()
{
return this.getClass() + " [physicalSupportId=" + physicalSupportId + ", supportType=" + supportType + "]";
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = prime * result + ((physicalSupportId == null) ? 0 : physicalSupportId.hashCode());
result = prime * result + ((supportType == null) ? 0 : supportType.hashCode());
return result;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj)
{
if (this == obj)
{
return true;
}
if (obj == null)
{
return false;
}
if (!(obj instanceof AContributionPhysicalSupport))
{
return false;
}
AContributionPhysicalSupport other = (AContributionPhysicalSupport) obj;
if (physicalSupportId == null)
{
if (other.physicalSupportId != null)
{
return false;
}
}
else if (!physicalSupportId.equals(other.physicalSupportId))
{
return false;
}
if (supportType == null)
{
if (other.supportType != null)
{
return false;
}
}
else if (!supportType.equals(other.supportType))
{
return false;
}
return true;
}
}
类视频继承自AContributionPhysicalSupport：
package org.pea.openVillages.pojo.contribution.implementation;
import javax.persistence.Column;
import javax.persistence.DiscriminatorValue;
import javax.persistence.Entity;
import javax.persistence.Table;
@Entity
@Table(name = "TOV_VIDEO")
@DiscriminatorValue("VIDEO")
public class Video extends AContributionPhysicalSupport
{
/* *****************************************************************
*
* PROPERTIES
*
* *****************************************************************
*/
/**
* for serializable
*/
private static final long serialVersionUID = 1L;
@Column(name = "VIDEO_TYPE", nullable = false, length = 20)
private String videoType;
@Column(name = "VIDEO_SIZE")
private Long videoSize;
@Column(name = "VIDEO_LENGTH")
private Long videoLength;
/* *****************************************************************
*
* CONSTRUCTORS
*
* *****************************************************************
*/
public Video()
{
super();
}
/* *****************************************************************
*
* GETTERS AND SETTERS
*
* *****************************************************************
*/
/**
* @return the videoType
*/
public String getVideoType()
{
return videoType;
}
/**
* @param videoType
* the videoType to set
*/
public void setVideoType(String videoType)
{
this.videoType = videoType;
}
/**
* @return the videoSize
*/
public Long getVideoSize()
{
return videoSize;
}
/**
* @param videoSize
* the videoSize to set
*/
public void setVideoSize(Long videoSize)
{
this.videoSize = videoSize;
}
/**
* @return the videoLength
*/
public Long getVideoLength()
{
return videoLength;
}
/**
* @param videoLength
* the videoLength to set
*/
public void setVideoLength(Long videoLength)
{
this.videoLength = videoLength;
}
/* *****************************************************************
*
* UTILS
*
* *****************************************************************
*/
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString()
{
return super.toString() + " Video [videoType=" + videoType + ", videoSize=" + videoSize + ", videoLength="
+ videoLength + "]";
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode()
{
final int prime = 31;
int result = super.hashCode();
result = prime * result + ((videoLength == null) ? 0 : videoLength.hashCode());
result = prime * result + ((videoSize == null) ? 0 : videoSize.hashCode());
result = prime * result + ((videoType == null) ? 0 : videoType.hashCode());
return result;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj)
{
if (this == obj)
{
return true;
}
if (!super.equals(obj))
{
return false;
}
if (!(obj instanceof Video))
{
return false;
}
Video other = (Video) obj;
if (videoLength == null)
{
if (other.videoLength != null)
{
return false;
}
}
else if (!videoLength.equals(other.videoLength))
{
return false;
}
if (videoSize == null)
{
if (other.videoSize != null)
{
return false;
}
}
else if (!videoSize.equals(other.videoSize))
{
return false;
}
if (videoType == null)
{
if (other.videoType != null)
{
return false;
}
}
else if (!videoType.equals(other.videoType))
{
return false;
}
return true;
}
}
这是我的绑定文件（还有其他类继承自AContributionPhysicalSupport ....）
<?xml version="1.0" encoding="UTF-8"?>
<xml-bindings xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm" package-name="org.pea.openVillages.pojo.contribution.implementation">
<java-types>
<java-type name="AContributionPhysicalSupport">
<xml-root-element name="contribution-physical-support" />
<xml-type prop-order="physicalSupportId supportType" />
<java-attributes>
<xml-attribute java-attribute="physicalSupportId" name="support-id" />
<xml-element java-attribute="supportType" name="support-type" />
</java-attributes>
</java-type>
<java-type name="ExternalFileFormat">
<xml-root-element name="ext-file-format" />
<xml-type prop-order="fileType fileSize" />
<java-attributes>
<xml-element java-attribute="fileType" name="file-type" />
<xml-element java-attribute="fileSize" name="file-size" />
</java-attributes>
</java-type>
<java-type name="InternalFileFormat">
<xml-root-element name="int-file-format" />
<xml-type prop-order="fileSize" />
<java-attributes>
<xml-element java-attribute="fileSize" name="file-size" />
</java-attributes>
</java-type>
<java-type name="Video">
<xml-root-element name="video" />
<xml-type prop-order="videoType videoSize videoLength" />
<java-attributes>
<xml-element java-attribute="videoType" name="video-type" />
<xml-element java-attribute="videoSize" name="video-size" />
<xml-element java-attribute="videoLength" name="video-length" />
</java-attributes>
</java-type>
</java-types>
</xml-bindings>
现在我的测试：
@Test
public void testYATMarshal() throws Exception
{
Video toto = new Video();
toto.setPhysicalSupportId(new Long(1));
toto.setSupportType("VIDEO");
toto.setVideoLength(new Long(358));
toto.setVideoSize(new Long(5775));
toto.setVideoType("avi");
FileReader videoBindFile = new FileReader(
"src/main/resources/xml-mapping/ContributionImpl-binding.xml");
List<Object> videoBindList = new ArrayList<Object>();
videoBindList.add(videoBindFile);
Map<String, List<Object>> videoMetaMap = new HashMap<String, List<Object>>();
videoMetaMap.put("org.pea.openVillages.pojo.contribution.implementation", videoBindList);
Map<String, Object> videoProperties = new HashMap<String, Object>();
videoProperties.put(JAXBContextProperties.OXM_METADATA_SOURCE, videoMetaMap);
JAXBContext context = JAXBContext.newInstance("org.pea.openVillages.pojo.contribution.implementation",
Video.class.getClassLoader(), videoProperties);
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(toto, System.out);
}
最后但并非最不重要的例外：
javax.xml.bind.JAXBException: Provider com.sun.xml.internal.bind.v2.ContextFactory could not be instantiated: javax.xml.bind.JAXBException: "org.pea.openVillages.pojo.contribution.implementation" doesnt contain ObjectFactory.class or jaxb.index
- with linked exception:
[javax.xml.bind.JAXBException: "org.pea.openVillages.pojo.contribution.implementation" doesnt contain ObjectFactory.class or jaxb.index]
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:146)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:347)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:431)
at org.pea.openVillages.dao.service.impl.ContributionDAOImplTest.testYATMarshal(ContributionDAOImplTest.java:187)
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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: javax.xml.bind.JAXBException: "org.pea.openVillages.pojo.contribution.implementation" doesnt contain ObjectFactory.class or jaxb.index
at com.sun.xml.internal.bind.v2.ContextFactory.createContext(ContextFactory.java:216)
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 javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:172)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:132)
... 33 more
更多信息：
四只眼睛比两只眼睛好。我没有得到我做错的事。如果有人看到它，请告诉我。
干杯
答案 0 :(得分：4)
Provider com.sun.xml.internal.bind.v2.ContextFactory could not be instantiated - 似乎你没有使用MOXy，而是使用内置的JAXB RI。
请查看Blaise的以下帖子：
另见以下问题：
Does MOXy need anything special when using with schema-derived classes?
答案 1 :(得分：1)
Lexicore在他的评论中提供的答案是为我做的！
我已设置了Blaise's answer所示的两个软件包：
JAXBContext jc = JAXBContext.newInstance("com.example.pkg1:org.example.pkg2");
就这样做了！
Thx man