在將數據嵌入到數據庫中時出現錯誤

Question

Iam在插入到數據庫時出現以下異常

下面是persistence.xml。

http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd」 版本= 「1.0」？>

<persistence-unit name="RetailUnit" > 
    <provider>org.hibernate.ejb.HibernatePersistence</provider> 
    <!-- the JNDI data source 
    <non-jta-data-source>java:comp/env/jdbc/tutorialDS</non-jta-data-source>--> 
    <properties> 
     <!-- if this is true, hibernate will print (to stdout) the SQL it executes, 
      so you can check it to ensure it's not doing anything crazy --> 
      <property name="hibernate.connection.driver_class" value="org.apache.derby.jdbc.ClientDriver"/> 
      <property name="hibernate.connection.url" value="jdbc:derby://localhost:1527/company;create=true" /> 
      <property name="hibernate.connection.username" value="admin" /> 
      <property name="hibernate.connection.password" value="admin" /> 
     <property name="hibernate.show_sql" value="true" /> 
     <property name="hibernate.format_sql" value="true" /> 
     <!-- since most database servers have slightly different versions of the 
      SQL, Hibernate needs you to choose a dialect so it knows the subtleties of 
      talking to that server --> 
     <property name="hibernate.dialect" value="org.hibernate.dialect.DerbyDialect" /> 
     <!-- this tell Hibernate to update the DDL when it starts, very useful 
      for development, dangerous in production --> 
     <property name="hibernate.hbm2ddl.auto" value="update" /> 
    </properties> 
</persistence-unit> 

WARNING: RAR5038:Unexpected exception while creating resource for pool DerbyPool. Exception : javax.resource.spi.ResourceAllocationException: Connection could not be allocated because: java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect. 
WARNING: RAR5117 : Failed to obtain/create connection from connection pool [ DerbyPool ]. Reason : com.sun.appserv.connectors.internal.api.PoolingException: Connection could not be allocated because: java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect. 
WARNING: RAR5114 : Error allocating connection : [Error in allocating a connection. Cause: Connection could not be allocated because: java.net.ConnectException : Error connecting to server localhost on port 1527 with message Connection refused: connect.] 
WARNING: EJB5184:A system exception occurred during an invocation on EJB CustomerSessionBeanImpl, method: public void retail.ejb.service.CustomerSessionBeanImpl.insterCustomerDetails(retail.model.vo.Customer) 
WARNING: javax.ejb.EJBException 
    at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5215) 
    at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5113) 
    at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4901) 
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045) 
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994) 
    at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:213) 
    at com.sun.ejb.containers.EJBObjectInvocationHandlerDelegate.invoke(EJBObjectInvocationHandlerDelegate.java:79) 
    at $Proxy203.insterCustomerDetails(Unknown Source) 
    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:601) 
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.privateInvoke(StubInvocationHandlerImpl.java:241) 
    at com.sun.corba.ee.impl.presentation.rmi.StubInvocationHandlerImpl.invoke(StubInvocationHandlerImpl.java:152) 
    at com.sun.corba.ee.impl.presentation.rmi.codegen.CodegenStubBase.invoke(CodegenStubBase.java:227) 
    at retail.ejb.service.__CustomerSessionBeanRemote_Remote_DynamicStub.insterCustomerDetails(retail/ejb/service/__CustomerSessionBeanRemote_Remote_DynamicStub.java) 
    at retail.ejb.service._CustomerSessionBeanRemote_Wrapper.insterCustomerDetails(retail/ejb/service/_CustomerSessionBeanRemote_Wrapper.java) 
    at retail.web.mbean.CustomerMB.createCustomer(CustomerMB.java:58) 
    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:601) 
    at com.sun.el.parser.AstValue.invoke(AstValue.java:254) 
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302) 
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) 
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) 
    at javax.faces.component.UICommand.broadcast(UICommand.java:315) 
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794) 
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259) 
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) 
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) 
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) 
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) 
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) 
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) 
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860) 
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757) 
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056) 
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229) 
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) 
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) 
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) 
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) 
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) 
    at java.lang.Thread.run(Thread.java:722) 

Answer 1

異常表明你在應用程序服務器上使用JPA，如果是這樣，你需要使用，所以EJB可以管理事務，除非你使用EJB來管理Bean管理事務