无法创建具有属性的DTO com.google.gdata.data.spreadsheet的SpreadsheetService，SpreadsheetFeed和WorksheetEntry
问题描述：
我目前正在开发基于OSGI的项目。这里是我遇到的情景： 1-我有WebService，返回 com.google.gdata.client.spreadsheet.SpreadsheetService对象。无法创建具有属性的DTO com.google.gdata.data.spreadsheet的SpreadsheetService，SpreadsheetFeed和WorksheetEntry
com.google.gdata.data.spreadsheet.SpreadsheetFeed
和com.google.gdata.data.spreadsheet.SpreadsheetFeed 2。在运行时，我遇到了一个异常，
5:40:08,183 Timer-2 INFO CXFServer:77 - Starting web service as SOAP URL: /spreadSheetConnector; WebService: com.pearlox.okarabia.ws.googlespr[email protected]1809715
15:40:08,431 Timer-2 ERROR CXFServer:68 - org.apache.cxf.service.factory.ServiceConstructionException
javax.xml.ws.WebServiceException: org.apache.cxf.service.factory.ServiceConstructionException
at org.apache.cxf.jaxws.EndpointImpl.doPublish(EndpointImpl.java:275)
at org.apache.cxf.jaxws.EndpointImpl.publish(EndpointImpl.java:209)
at org.apache.cxf.jaxws.spi.ProviderImpl.createAndPublishEndpoint(ProviderImpl.java:84)
at javax.xml.ws.Endpoint.publish(Endpoint.java:170)
at com.pearlox.varaza.cxf.CXFServer.startWSImpl(CXFServer.java:78)
at com.pearlox.varaza.cxf.CXFServer.startWSImpl(CXFServer.java:49)
at com.pearlox.varaza.osgi.AbstractServer.startAllWebServices(AbstractServer.java:115)
at com.pearlox.varaza.osgi.AbstractServer.start(AbstractServer.java:60)
at com.pearlox.varaza.cxf.CXFServer.handleEvent(CXFServer.java:64)
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 org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:56)
at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:39)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy356.handleEvent(Unknown Source)
at org.eclipse.equinox.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:177)
at org.eclipse.equinox.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:198)
at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:220)
at org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:149)
at org.eclipse.equinox.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:137)
at org.eclipse.equinox.event.EventAdminImpl.sendEvent(EventAdminImpl.java:76)
at com.pearlox.varaza.cxf.CXFServletExt.sendEvent(CXFServletExt.java:85)
at com.pearlox.varaza.cxf.CXFServletExt.loadBus(CXFServletExt.java:58)
at org.apache.cxf.transport.servlet.AbstractCXFServlet.init(AbstractCXFServlet.java:78)
at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:433)
at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:256)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:612)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:139)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:510)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
at org.springframework.osgi.web.deployer.jetty.JettyWarDeployer.startWebAppContext(JettyWarDeployer.java:210)
at org.springframework.osgi.web.deployer.jetty.JettyWarDeployer.startDeployment(JettyWarDeployer.java:122)
at org.springframework.osgi.web.deployer.support.AbstractWarDeployer.deploy(AbstractWarDeployer.java:93)
at org.springframework.osgi.web.extender.internal.activator.WarLoaderListener$DeploymentManager$DeployTask.doRun(WarLoaderListener.java:257)
at org.springframework.osgi.web.extender.internal.activator.WarLoaderListener$DeploymentManager$BaseTask.run(WarLoaderListener.java:215)
at org.springframework.scheduling.timer.DelegatingTimerTask.run(DelegatingTimerTask.java:70)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)
Caused by: org.apache.cxf.service.factory.ServiceConstructionException
at org.apache.cxf.jaxb.JAXBDataBinding.initialize(JAXBDataBinding.java:351)
at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.buildServiceFromClass(ReflectionServiceFactoryBean.java:460)
at org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.buildServiceFromClass(JaxWsServiceFactoryBean.java:548)
at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.initializeServiceModel(ReflectionServiceFactoryBean.java:523)
at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.create(ReflectionServiceFactoryBean.java:271)
at org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.create(JaxWsServiceFactoryBean.java:177)
at org.apache.cxf.frontend.AbstractWSDLBasedEndpointFactory.createEndpoint(AbstractWSDLBasedEndpointFactory.java:100)
at org.apache.cxf.frontend.ServerFactoryBean.create(ServerFactoryBean.java:105)
at org.apache.cxf.jaxws.JaxWsServerFactoryBean.create(JaxWsServerFactoryBean.java:167)
at org.apache.cxf.jaxws.EndpointImpl.getServer(EndpointImpl.java:346)
at org.apache.cxf.jaxws.EndpointImpl.doPublish(EndpointImpl.java:259)
... 46 more
Caused by: com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException: 3 counts of IllegalAnnotationExceptions
com.google.gdata.util.Version does not have a no-arg default constructor.
this problem is related to the following location:
at com.google.gdata.util.Version
at public com.google.gdata.util.Version com.google.gdata.client.Service.getProtocolVersion()
at com.google.gdata.client.Service
at public com.google.gdata.client.Service com.google.gdata.data.BaseEntry.getService()
at com.google.gdata.data.BaseEntry
at com.google.gdata.data.spreadsheet.WorksheetEntry
com.google.gdata.client.Service$GDataRequestFactory is an interface, and JAXB can't handle interfaces.
this problem is related to the following location:
at com.google.gdata.client.Service$GDataRequestFactory
at public com.google.gdata.client.Service$GDataRequestFactory com.google.gdata.client.Service.getRequestFactory()
at com.google.gdata.client.Service
at public com.google.gdata.client.Service com.google.gdata.data.BaseEntry.getService()
at com.google.gdata.data.BaseEntry
at com.google.gdata.data.spreadsheet.WorksheetEntry
com.google.gdata.client.Service$GDataRequestFactory does not have a no-arg default constructor.
this problem is related to the following location:
at com.google.gdata.client.Service$GDataRequestFactory
at public com.google.gdata.client.Service$GDataRequestFactory com.google.gdata.client.Service.getRequestFactory()
at com.google.gdata.client.Service
at public com.google.gdata.client.Service com.google.gdata.data.BaseEntry.getService()
at com.google.gdata.data.BaseEntry
at com.google.gdata.data.spreadsheet.WorksheetEntry
3-有人告诉我，一个Webservice，造成这种异常，因为它不能返回的任何对象，但Java的班或DTO班。我使用SpreadsheetService，SpreadsheetFeed，WorksheetEntry作为它的属性创建了CustomDTO，这样我就可以返回CustomDTO作为我的WebService的返回对象。
package com.pearlox.okarabia.dto;
import com.google.gdata.client.spreadsheet.SpreadsheetService;
import com.google.gdata.data.spreadsheet.SpreadsheetFeed;
import com.google.gdata.data.spreadsheet.WorksheetEntry;
public class CustomDTO {
private SpreadsheetService spreadsheetService;
private WorksheetEntry worksheetEntry;
private SpreadsheetFeed spreadsheetFeed;
public CustomDTO(){
}
public void setSpreadsheetService(SpreadsheetService spreadsheetService) {
this.spreadsheetService = spreadsheetService;
}
public SpreadsheetService getSpreadsheetService() {
return spreadsheetService;
}
public void setWorksheetEntry(WorksheetEntry worksheetEntry) {
this.worksheetEntry = worksheetEntry;
}
public WorksheetEntry getWorksheetEntry() {
return worksheetEntry;
}
public void setSpreadsheetFeed(SpreadsheetFeed spreadsheetFeed) {
this.spreadsheetFeed = spreadsheetFeed;
}
public SpreadsheetFeed getSpreadsheetFeed() {
return spreadsheetFeed;
}
}
5-现在我所有的DTO包都崩溃了。我不能在DTO捆绑包上使用任何其他DTO。 012-6- PS。当我删除CustomDTO.java中的当前属性并添加一个像String一样的常规java对象时，testString =“Hello World”在这种情况下，DTO工作正常。 7-我可以看到很明显，我不能在我的DTO中使用SpreadsheetService，WorksheetEntry，SpreadsheetFeed作为属性。
任何人都可以帮忙吗？
答
这似乎不是一个特别的OSGi问题，而是一个常见的web服务问题。
您可以为每种类型编写一个javax.xml.bind.annotation.adapters.XmlAdapter并将它们转换为您自己的DTO，或者通过为每个Google类编写单独的DTO来更手动地完成此操作。这是一个相当全面的example of an XmlAdapter
像String testString="Hello World"这样的原始类型可以正常工作，因为这些是Java/xs：类型的已知映射。但是不遵循Bean风格的复杂对象，没有零参数构造函数等等肯定会导致问题。
在附注上;我不认为你应该通过服务，如果它携带状态，你应该提取它。