问题
I am trying to create a sample test application which converts an object to JaxbRepresentation. But when I try to run this, it gives me an error.
Main.java file
package test_jaxb;
import org.restlet.Server;
import org.restlet.data.Protocol;
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) throws Exception {
Server helloServer = new Server(Protocol.HTTP, 8111,
TestResource.class);
helloServer.start();
}
}
TestResource.java file
package test_jaxb;
import org.restlet.ext.jaxb.JaxbRepresentation;
import org.restlet.representation.Representation;
import org.restlet.resource.ResourceException;
import org.restlet.resource.ServerResource;
public class TestResource extends ServerResource{
@Override
protected Representation get() throws ResourceException {
SampleResponse res = new SampleResponse();
res.setMsg("Success");
res.setStatusCode(0);
JaxbRepresentation<SampleResponse> representation = new JaxbRepresentation<SampleResponse>(res);
return representation;
}
}
SampleResponse.java file
package test_jaxb;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name="Response")
public class SampleResponse {
private int statusCode;
private String msg;
@XmlElement(name="Msg")
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
@XmlElement(name="StatusCode")
public int getStatusCode() {
return statusCode;
}
public void setStatusCode(int statusCode) {
this.statusCode = statusCode;
}
}
When I run this on the server, it throws the following error:
WARNING: Problem creating Marshaller
javax.xml.bind.JAXBException: "test_jaxb" doesnt contain ObjectFactory.class or jaxb.index
at com.sun.xml.internal.bind.v2.ContextFactory.createContext(ContextFactory.java:119)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:132)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:299)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:372)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:337)
at org.restlet.ext.jaxb.JaxbRepresentation.getContext(JaxbRepresentation.java:83)
at org.restlet.ext.jaxb.internal.Marshaller$1.initialValue(Marshaller.java:68)
at org.restlet.ext.jaxb.internal.Marshaller$1.initialValue(Marshaller.java:64)
at java.lang.ThreadLocal.setInitialValue(ThreadLocal.java:141)
at java.lang.ThreadLocal.get(ThreadLocal.java:131)
at org.restlet.ext.jaxb.internal.Marshaller.getMarshaller(Marshaller.java:163)
at org.restlet.ext.jaxb.internal.Marshaller.marshal(Marshaller.java:216)
at org.restlet.ext.jaxb.JaxbRepresentation.write(JaxbRepresentation.java:527)
at org.restlet.representation.WriterRepresentation.write(WriterRepresentation.java:104)
at org.restlet.engine.http.connector.Connection.writeMessageBody(Connection.java:873)
at org.restlet.engine.http.connector.Connection.writeMessage(Connection.java:818)
at org.restlet.engine.http.connector.ServerConnection.writeMessage(ServerConnection.java:334)
at org.restlet.engine.http.connector.Connection.writeMessages(Connection.java:954)
at org.restlet.engine.http.connector.BaseServerHelper.handleOutbound(BaseServerHelper.java:201)
at org.restlet.engine.http.connector.BaseHelper.handleNextOutbound(BaseHelper.java:425)
at org.restlet.engine.http.connector.BaseServerHelper.handleInbound(BaseServerHelper.java:174)
at org.restlet.engine.http.connector.BaseHelper.handleNextInbound(BaseHelper.java:418)
at org.restlet.engine.http.connector.Connection.readMessages(Connection.java:695)
at org.restlet.engine.http.connector.Controller$2.run(Controller.java:95)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
May 16, 2011 7:05:12 AM org.restlet.ext.jaxb.internal.Marshaller getMarshaller
WARNING: Unable to locate marshaller.
May 16, 2011 7:05:12 AM org.restlet.ext.jaxb.JaxbRepresentation write
WARNING: JAXB marshalling error caught.
javax.xml.bind.JAXBException: Unable to locate marshaller.
at org.restlet.ext.jaxb.internal.Marshaller.getMarshaller(Marshaller.java:166)
at org.restlet.ext.jaxb.internal.Marshaller.marshal(Marshaller.java:216)
at org.restlet.ext.jaxb.JaxbRepresentation.write(JaxbRepresentation.java:527)
at org.restlet.representation.WriterRepresentation.write(WriterRepresentation.java:104)
at org.restlet.engine.http.connector.Connection.writeMessageBody(Connection.java:873)
at org.restlet.engine.http.connector.Connection.writeMessage(Connection.java:818)
at org.restlet.engine.http.connector.ServerConnection.writeMessage(ServerConnection.java:334)
at org.restlet.engine.http.connector.Connection.writeMessages(Connection.java:954)
at org.restlet.engine.http.connector.BaseServerHelper.handleOutbound(BaseServerHelper.java:201)
at org.restlet.engine.http.connector.BaseHelper.handleNextOutbound(BaseHelper.java:425)
at org.restlet.engine.http.connector.BaseServerHelper.handleInbound(BaseServerHelper.java:174)
at org.restlet.engine.http.connector.BaseHelper.handleNextInbound(BaseHelper.java:418)
at org.restlet.engine.http.connector.Connection.readMessages(Connection.java:695)
at org.restlet.engine.http.connector.Controller$2.run(Controller.java:95)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
May 16, 2011 7:05:12 AM org.restlet.ext.jaxb.internal.Marshaller$1 initialValue
WARNING: Problem creating Marshaller
javax.xml.bind.JAXBException: "failure" doesnt contain ObjectFactory.class or jaxb.index
at com.sun.xml.internal.bind.v2.ContextFactory.createContext(ContextFactory.java:119)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:132)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:299)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:372)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:337)
at org.restlet.ext.jaxb.JaxbRepresentation.getContext(JaxbRepresentation.java:83)
at org.restlet.ext.jaxb.internal.Marshaller$1.initialValue(Marshaller.java:68)
at org.restlet.ext.jaxb.internal.Marshaller$1.initialValue(Marshaller.java:64)
at java.lang.ThreadLocal.setInitialValue(ThreadLocal.java:141)
at java.lang.ThreadLocal.get(ThreadLocal.java:131)
at org.restlet.ext.jaxb.internal.Marshaller.getMarshaller(Marshaller.java:163)
at org.restlet.ext.jaxb.internal.Marshaller.marshal(Marshaller.java:216)
at org.restlet.ext.jaxb.JaxbRepresentation.write(JaxbRepresentation.java:535)
at org.restlet.representation.WriterRepresentation.write(WriterRepresentation.java:104)
at org.restlet.engine.http.connector.Connection.writeMessageBody(Connection.java:873)
at org.restlet.engine.http.connector.Connection.writeMessage(Connection.java:818)
at org.restlet.engine.http.connector.ServerConnection.writeMessage(ServerConnection.java:334)
at org.restlet.engine.http.connector.Connection.writeMessages(Connection.java:954)
at org.restlet.engine.http.connector.BaseServerHelper.handleOutbound(BaseServerHelper.java:201)
at org.restlet.engine.http.connector.BaseHelper.handleNextOutbound(BaseHelper.java:425)
at org.restlet.engine.http.connector.BaseServerHelper.handleInbound(BaseServerHelper.java:174)
at org.restlet.engine.http.connector.BaseHelper.handleNextInbound(BaseHelper.java:418)
at org.restlet.engine.http.connector.Connection.readMessages(Connection.java:695)
at org.restlet.engine.http.connector.Controller$2.run(Controller.java:95)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
May 16, 2011 7:05:12 AM org.restlet.ext.jaxb.internal.Marshaller getMarshaller
WARNING: Unable to locate marshaller.
May 16, 2011 7:05:12 AM org.restlet.engine.http.connector.Connection writeMessage
WARNING: Exception while writing the message body.
java.io.IOException: Unable to locate marshaller.
at org.restlet.ext.jaxb.JaxbRepresentation.write(JaxbRepresentation.java:539)
at org.restlet.representation.WriterRepresentation.write(WriterRepresentation.java:104)
at org.restlet.engine.http.connector.Connection.writeMessageBody(Connection.java:873)
at org.restlet.engine.http.connector.Connection.writeMessage(Connection.java:818)
at org.restlet.engine.http.connector.ServerConnection.writeMessage(ServerConnection.java:334)
at org.restlet.engine.http.connector.Connection.writeMessages(Connection.java:954)
at org.restlet.engine.http.connector.BaseServerHelper.handleOutbound(BaseServerHelper.java:201)
at org.restlet.engine.http.connector.BaseHelper.handleNextOutbound(BaseHelper.java:425)
at org.restlet.engine.http.connector.BaseServerHelper.handleInbound(BaseServerHelper.java:174)
at org.restlet.engine.http.connector.BaseHelper.handleNextInbound(BaseHelper.java:418)
at org.restlet.engine.http.connector.Connection.readMessages(Connection.java:695)
at org.restlet.engine.http.connector.Controller$2.run(Controller.java:95)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
May 16, 2011 7:05:12 AM org.restlet.engine.http.connector.ServerConnection writeMessage
INFO: An exception occured while writing the response
java.io.IOException: Unable to locate marshaller.
at org.restlet.ext.jaxb.JaxbRepresentation.write(JaxbRepresentation.java:539)
at org.restlet.representation.WriterRepresentation.write(WriterRepresentation.java:104)
at org.restlet.engine.http.connector.Connection.writeMessageBody(Connection.java:873)
at org.restlet.engine.http.connector.Connection.writeMessage(Connection.java:818)
at org.restlet.engine.http.connector.ServerConnection.writeMessage(ServerConnection.java:334)
at org.restlet.engine.http.connector.Connection.writeMessages(Connection.java:954)
at org.restlet.engine.http.connector.BaseServerHelper.handleOutbound(BaseServerHelper.java:201)
at org.restlet.engine.http.connector.BaseHelper.handleNextOutbound(BaseHelper.java:425)
at org.restlet.engine.http.connector.BaseServerHelper.handleInbound(BaseServerHelper.java:174)
at org.restlet.engine.http.connector.BaseHelper.handleNextInbound(BaseHelper.java:418)
at org.restlet.engine.http.connector.Connection.readMessages(Connection.java:695)
at org.restlet.engine.http.connector.Controller$2.run(Controller.java:95)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
Please someone help!!!
回答1:
To get rid of additional jaxb.index files you may use Java class to instantiate the context:
http://docs.oracle.com/javase/6/docs/api/javax/xml/bind/JAXBContext.html#newInstance(java.lang.Class...)
Usually you need to pass in only single java class because other classes are "statically reachable from these class(es)" so JAXB is able to identify them.
回答2:
In my case I was able to resolve this by adding a file called "jaxb.index" in the same package folder as the JAXB annotated class. In that file list the simple, non-qualified names of the annotated classes.
For example, my file /MyProject/src/main/java/com/example/services/types/jaxb.index is simply one line (since I have only one JAXB typed class):
ServerDiagContent
which refers to the class com.example.services.types.ServerDiagContent
回答3:
I got this error because of a ClassLoader issue, and I was able to solve it by explicitly passing the ClassLoader that JAXB should use, so this:
JAXBContext.newInstance(com.myexample.test.ObjectFactory.class.getPackage().getName());
gave an error, but worked properly when using:
JAXBContext.newInstance(com.myexample.test.ObjectFactory.class.getPackage().getName(),
com.myexample.test.ObjectFactory.class.getClassLoader());
which is probably similar to user3243752's answer, I bet that JAXB is automatically choosing the ClassLoader from the passed in class when using the #newInstance(Class... classesToBeBound) method signature.
回答4:
I was using Spring and I just had to change
Jaxb2Marshaller mlr = new Jaxb2Marshaller();
mlr.setContextPaths("","");
to
Jaxb2Marshaller mlr = new Jaxb2Marshaller();
mlr.setPackagesToScan("","");
Ref1 & Ref2
回答5:
In my case I was able to solve the problem by changing the instantiation of the JAXBContext. It can either be instantiated with the package name or the ObjectFactory class as a parameter.
When instantiating with the package name:
com.myexample.test.ObjectFactory objectFactory = new com.myexample.test.ObjectFactory();
JAXBContext jaxbContext = JAXBContext.newInstance(objectFactoryMessageBody.getClass().getPackage().getName());
It gave the error:
"com.myexample.test" doesnt contain ObjectFactory.class or jaxb.index
No errors when instantiating with the class name:
com.myexample.test.ObjectFactory objectFactory = new com.myexample.test.ObjectFactory();
JAXBContext jaxbContext = JAXBContext.newInstance(objectFactoryMessageBody.getClass());
回答6:
If you have an instantiation of your object factory like
private ObjectFactory of;
..then the safest, most reliable way to get a Context to Marshall with is:
JAXBElement<GreetingListType> gl = of.createGreetings( grList );
JAXBContext jc = JAXBContext.newInstance(of.getClass());
Marshaller m = jc.createMarshaller();
回答7:
Use the complete package name of the where the ObjectFactory class is present to declare and instantiate the Object.
来源：https://stackoverflow.com/questions/6017146/jaxbrepresentation-gives-error-doesnt-contain-objectfactory-class-or-jaxb-index