自動密鑰生成

Question

我有一個表：

CREATE TABLE IF NOT EXISTS `ePrzychodnia`.`admins` (
    `id` INT NOT NULL , 
    `firstName` VARCHAR(45) NOT NULL , 
    `lastName` VARCHAR(45) NOT NULL , 
    `personalId` VARCHAR(11) NOT NULL , 
    `password` VARCHAR(45) NOT NULL , 
    PRIMARY KEY (`id`) , 
    UNIQUE INDEX `personalId_UNIQUE` (`personalId` ASC) , 
    UNIQUE INDEX `password_UNIQUE` (`password` ASC)) 

和實體類

@Entity 
@Table(name = "admins") 
@XmlRootElement 
public class Admin implements Serializable { 
    private static final long serialVersionUID = 1L; 
    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    @Basic(optional = false) 
    @NotNull 
    @Column(name = "id") 
    private Integer id; 
    @Basic(optional = false) 
    @NotNull 
    @Size(min = 1, max = 45) 
    @Column(name = "firstName") 
    private String firstName; 
    @Basic(optional = false) 
    @NotNull 
    @Size(min = 1, max = 45) 
    @Column(name = "lastName") 
    private String lastName; 
    @Basic(optional = false) 
    @NotNull 
    @Size(min = 1, max = 11) 
    @Column(name = "personalId") 
    private String personalId; 
    @Basic(optional = false) 
    @NotNull 
    @Size(min = 1, max = 45) 
    @Column(name = "password") 
    private String password; 

我使用@GeneratedValue（策略= GenerationType.AUTO）

但如果加入收到錯誤

javax.faces.el.EvaluationException: javax.ejb.EJBTransactionRolledbackException 
     at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102) 
     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$Worker.run(AbstractThreadPool.java:513) 
     at java.lang.Thread.run(Thread.java:722) 
Caused by: javax.ejb.EJBTransactionRolledbackException 
     at com.sun.ejb.containers.BaseContainer.mapLocal3xException(BaseContainer.java:2314) 
     at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2096) 
     at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1994) 
     at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222) 
     at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:89) 
     at com.sun.proxy.$Proxy138.create(Unknown Source) 
     at pl.ePrzychodnia.dao.EJB31_GeneratedAdminDaoIntfBean.create(Unknown Source) 
     at pl.ePrzychodnia.facade.AdminFacade.create(AdminFacade.java:28) 
     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 org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052) 
     at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124) 
     at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5388) 
     at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619) 
     at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
     at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571) 
     at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162) 
     at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144) 
     at sun.reflect.GeneratedMethodAccessor79.invoke(Unknown Source) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
     at java.lang.reflect.Method.invoke(Method.java:601) 
     at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:861) 
     at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
     at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:370) 
     at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5360) 
     at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348) 
     at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214) 
     at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:89) 
     at com.sun.proxy.$Proxy137.create(Unknown Source) 
     at pl.ePrzychodnia.mb.AdminMB.createAdmin(AdminMB.java:45) 
     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 javax.el.BeanELResolver.invokeMethod(BeanELResolver.java:779) 
     at javax.el.BeanELResolver.invoke(BeanELResolver.java:528) 
     at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:257) 
     at com.sun.el.parser.AstValue.invoke(AstValue.java:248) 
     at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:302) 
     at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) 
     at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88) 
     ... 32 more 
Caused by: javax.ejb.TransactionRolledbackLocalException: Exception thrown from bean 
     at com.sun.ejb.containers.BaseContainer.checkExceptionClientTx(BaseContainer.java:5071) 
     at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4906) 
     at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2045) 
     ... 73 more 
Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.DatabaseException 
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'eprzychodnia.sequence' doesn't exist 
Error Code: 1146 
Call: UPDATE SEQUENCE SET SEQ_COUNT = SEQ_COUNT + ? WHERE SEQ_NAME = ? 
     bind => [2 parameters bound] 
Query: DataModifyQuery(name="SEQUENCE" sql="UPDATE SEQUENCE SET SEQ_COUNT = SEQ_COUNT + ? WHERE SEQ_NAME = ?") 
     at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:324) 
     at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:840) 
     at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeNoSelect(DatabaseAccessor.java:906) 
     at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:592) 
     at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:535) 
     at org.eclipse.persistence.internal.sessions.AbstractSession.basicExecuteCall(AbstractSession.java:1717) 
     at org.eclipse.persistence.sessions.server.ClientSession.executeCall(ClientSession.java:253) 
     at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:207) 
     at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:193) 
     at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeNoSelectCall(DatasourceCallQueryMechanism.java:236) 
     at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeNoSelect(DatasourceCallQueryMechanism.java:216) 
     at org.eclipse.persistence.queries.DataModifyQuery.executeDatabaseQuery(DataModifyQuery.java:85) 
     at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:844) 
     at org.eclipse.persistence.internal.sessions.AbstractSession.internalExecuteQuery(AbstractSession.java:2831) 
     at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1516) 
     at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1498) 
     at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1463) 
     at org.eclipse.persistence.sequencing.QuerySequence.update(QuerySequence.java:340) 
     at org.eclipse.persistence.sequencing.QuerySequence.updateAndSelectSequence(QuerySequence.java:277) 
     at org.eclipse.persistence.sequencing.StandardSequence.getGeneratedVector(StandardSequence.java:71) 
     at org.eclipse.persistence.sequencing.DefaultSequence.getGeneratedVector(DefaultSequence.java:163) 
     at org.eclipse.persistence.sequencing.Sequence.getGeneratedVector(Sequence.java:257) 
     at org.eclipse.persistence.internal.sequencing.SequencingManager$Preallocation_Transaction_NoAccessor_State.getNextValue(SequencingManager.java:468) 
     at org.eclipse.persistence.internal.sequencing.SequencingManager.getNextValue(SequencingManager.java:1067) 
     at org.eclipse.persistence.internal.sequencing.ClientSessionSequencing.getNextValue(ClientSessionSequencing.java:70) 
     at org.eclipse.persistence.internal.descriptors.ObjectBuilder.assignSequenceNumber(ObjectBuilder.java:349) 
     at org.eclipse.persistence.internal.descriptors.ObjectBuilder.assignSequenceNumber(ObjectBuilder.java:308) 
     at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.assignSequenceNumber(UnitOfWorkImpl.java:465) 
     at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNotRegisteredNewObjectForPersist(UnitOfWorkImpl.java:4231) 
     at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.registerNotRegisteredNewObjectForPersist(RepeatableWriteUnitOfWork.java:513) 
     at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNewObjectForPersist(UnitOfWorkImpl.java:4176) 
     at org.eclipse.persistence.internal.jpa.EntityManagerImpl.persist(EntityManagerImpl.java:440) 
     at com.sun.enterprise.container.common.impl.EntityManagerWrapper.persist(EntityManagerWrapper.java:269) 
     at pl.ePrzychodnia.dao.GenericDao.create(GenericDao.java:27) 
     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 org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052) 
     at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124) 
     at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5388) 
     at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619) 
     at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
     at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571) 
     at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162) 
     at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144) 
     at sun.reflect.GeneratedMethodAccessor79.invoke(Unknown Source) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
     at java.lang.reflect.Method.invoke(Method.java:601) 
     at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:861) 
     at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:800) 
     at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:370) 
     at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5360) 
     at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5348) 
     at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214) 
     ... 71 more 
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'eprzychodnia.sequence' doesn't exist 
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:525) 
     at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) 
     at com.mysql.jdbc.Util.getInstance(Util.java:386) 
     at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1054) 
     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4187) 
     at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4119) 
     at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2570) 
     at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2731) 
     at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2815) 
     at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155) 
     at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2458) 
     at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2375) 
     at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2359) 
     at com.sun.gjc.spi.base.PreparedStatementWrapper.executeUpdate(PreparedStatementWrapper.java:125) 
     at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeDirectNoSelect(DatabaseAccessor.java:831) 
     ... 124 more 

爲什麼？我一定在做別的事情？如果我使用generationType.AUTO需要在數據庫中添加一個序列什麼的？

Answer 1

您沒有將ID設爲自動增量列。我建議你這樣做。

http://dev.mysql.com/doc/refman/5.0/en/example-auto-increment.html

你還需要Hibernate的使用身份策略。

How to annotate MYSQL autoincrement field with JPA annotations