javax.xml.bind.JAXBException: Class *** und keine ihrer Superklassen sind in diesem Kontext bekannt
Ich versuche, ein Objekt über den REST-Webdienst weiterzuleiten. Im Folgenden werden in meinen Klassen die Funktionen erläutert, die ich mithilfe einiger Beispielcodes benötige.
Rest Web Service Class-Methode
@POST
@Path("/find")
@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
@Produces({MediaType.APPLICATION_JSON})
public Response getDepartments(){
Response response = new Response();
try {
response.setCode(MessageCode.SUCCESS);
response.setMessage("Department Names");
Department dept = new Department("12", "Financial");
response.setPayload(dept);
} catch (Exception e) {
response.setCode(MessageCode.ERROR);
response.setMessage(e.getMessage());
e.printStackTrace();
}
return response;
}
Antwortklasse
import java.io.Serializable;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Response implements Serializable{
private static final long serialVersionUID = 1L;
public enum MessageCode {
SUCCESS, ERROR, UNKNOWN
}
private MessageCode code;
private String message;
private Object payload;
public MessageCode getCode() {
return code;
}
public void setCode(MessageCode code) {
this.code = code;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public Object getPayload() {
return payload;
}
public void setPayload(Object payload) {
this.payload = payload;
}
}
Abteilungsklasse
@XmlRootElement
public class Department implements java.io.Serializable {
private String deptNo;
private String deptName;
public Department() {
}
public Department(String deptNo, String deptName) {
this.deptNo = deptNo;
this.deptName = deptName;
}
public String getDeptNo() {
return this.deptNo;
}
public void setDeptNo(String deptNo) {
this.deptNo = deptNo;
}
public String getDeptName() {
return this.deptName;
}
public void setDeptName(String deptName) {
this.deptName = deptName;
}
}
Wenn ich die Methode getDepartments in der restlichen Webdienstklasse aufrufe, werden die folgenden Ausnahmen zurückgegeben. Aber wenn ich den Typ ändereObjekt desNutzlast zuAbteilung In der Response-Klasse wird die json-Antwort korrekt zurückgegeben. Da ich diese Response-Klasse jedoch für verschiedene Klassentypen verwenden muss, kann ich die Nutzdaten nicht auf einen Klassentyp beschränken. Kann mir bitte jemand in dieser Angelegenheit helfen?
Stack Trace
Dec 27, 2012 9:34:18 PM com.sun.jersey.spi.container.ContainerResponse logException
SEVERE: Mapped exception to response: 500 (Internal Server Error)
javax.ws.rs.WebApplicationException: javax.xml.bind.MarshalException
- with linked exception:
[javax.xml.bind.JAXBException: class Department nor any of its super class is known to this context.]
at com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.writeTo(AbstractRootElementProvider.java:159)
at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:306)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1437)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)
at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:699)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:401)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
Caused by: javax.xml.bind.MarshalException
- with linked exception:
[javax.xml.bind.JAXBException: class Department nor any of its super class is known to this context.]
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:323)
at com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:177)
at com.sun.jersey.json.impl.BaseJSONMarshaller.marshallToJSON(BaseJSONMarshaller.java:103)
at com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider.writeTo(JSONRootElementProvider.java:136)
at com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.writeTo(AbstractRootElementProvider.java:157)
... 23 more
Caused by: javax.xml.bind.JAXBException: class Department nor any of its super class is known to this context.
at com.sun.xml.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:250)
at com.sun.xml.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:265)
at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:657)
at com.sun.xml.bind.v2.runtime.property.SingleElementNodeProperty.serializeBody(SingleElementNodeProperty.java:156)
at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:344)
at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsSoleContent(XMLSerializer.java:597)
at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.serializeRoot(ClassBeanInfoImpl.java:328)
at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:498)
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:320)
... 27 more
Caused by: javax.xml.bind.JAXBException: class Department nor any of its super class is known to this context.
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getBeanInfo(JAXBContextImpl.java:611)
at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:652)
... 33 more