1
我在注入StoreBean到Restful服務時遇到問題。我已經重新編寫了一些代碼以獲得一個觀點。EJB注入Restful服務(NullPointerException)
下面是代碼(DataStoreBean):
@Local(DataStore.class)
@Stateless
public class DataStoreBean implements DataStore
{
public String get()
{
return "works";
}
}
這裏是代碼RestEndpoint:
@RequestScoped
@Path("/DataStore")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class DataStoreRestEndpoint
{
@EJB
DataStoreBean dataStore;
@GET
@Path("/test")
public String get()
{
return dataStore.get();
}
}
當我執行我總是得到NPE。
Caused by: java.lang.NullPointerException
at org.it.datastore.DataStoreRestEndpoint.get(DataStoreRestEndpoint.java:112) [classes:]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) [rt.jar:1.7.0_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) [rt.jar:1.7.0_25]
at java.lang.reflect.Method.invoke(Unknown Source) [rt.jar:1.7.0_25]
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:155) [resteasy-jaxrs-2.3.1.GA.jar:]
at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:257) [resteasy-jaxrs-2.3.1.GA.jar:]
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:222) [resteasy-jaxrs-2.3.1.GA.jar:]
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:211) [resteasy-jaxrs-2.3.1.GA.jar:]
at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:525) [resteasy-jaxrs-2.3.1.GA.jar:]
... 19 more
我使用JBoss 7.1和EJB3
我試過,但再部署,當我得到這個錯誤:'不與類型的接口中發現EJB「org.it.datastore.DataStoreBean」的結合org.it.datastore.DataStoreRestEndpoint/dataStore' –
你是否刪除了requestscope註釋? – pL4Gu33
是的,我做到了。但仍然山姆錯誤。 –