我正在使用EJB和JPA
开发JavaEE应用程序我的两个实体是：
@Entity
public class Utente implements Serializable {
private static final long serialVersionUID = 1L;
@Override
public String toString() {
return "Utente [cod_utente=" + cod_utente + ", nome_utente="
+ nome_utente + ", morada_utente=" + morada_utente
+ ", dnasc_utente=" + dnasc_utente + ", tel_utente="
+ tel_utente + "]";
}
/**
*
*/
public Utente(String nome_utente, String morada_utente,
GregorianCalendar dnasc_utente, int tel_utente) {
super();
this.nome_utente = nome_utente;
this.morada_utente = morada_utente;
this.dnasc_utente = dnasc_utente;
this.tel_utente = tel_utente;
}
@Id
@GeneratedValue
private int cod_utente;
private String nome_utente;
private String morada_utente;
@Temporal(TemporalType.DATE)
private GregorianCalendar dnasc_utente;
private int tel_utente;
private List<GregorianCalendar> agenda;
@OneToMany
@JoinColumn(nullable=true)
private List<Prescricao> lista_presc;
public Utente(){
super();
}
public List<Prescricao> getLista_presc() {
return lista_presc;
}
public void setLista_presc(List<Prescricao> lista_presc) {
this.lista_presc = lista_presc;
}
public List<GregorianCalendar> getAgenda() {
return agenda;
}
public void setAgenda(List<GregorianCalendar> agenda) {
this.agenda = agenda;
}
public int getCod_utente() {
return cod_utente;
}
public void setCod_utente(int cod_utente) {
this.cod_utente = cod_utente;
}
public String getNome_utente() {
return nome_utente;
}
public void setNome_utente(String nome_utente) {
this.nome_utente = nome_utente;
}
public String getMorada_utente() {
return morada_utente;
}
public void setMorada_utente(String morada_utente) {
this.morada_utente = morada_utente;
}
public GregorianCalendar getDnasc_utente() {
return dnasc_utente;
}
public void setDnasc_utente(GregorianCalendar dnasc_utente) {
this.dnasc_utente = dnasc_utente;
}
public int getTel_utente() {
return tel_utente;
}
public void setTel_utente(int tel_utente) {
this.tel_utente = tel_utente;
}
}
和
@Entity
public class FichaClinica implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
/**
*
*/
@Id
@GeneratedValue
private int cod_ficha;
@OneToOne
@JoinColumn
private Utente utente;
@OneToMany
@JoinColumn(nullable=true)
private List <AtoEnfermagem> lista_atos_enf;
@OneToMany
@JoinColumn(nullable=true)
private List <AtoMedico> lista_atos_medicos;
@OneToMany
@JoinColumn(nullable=true)
private List<Consulta> lista_consultas;
public FichaClinica(){ //construtor vazio
super();
}
public Utente getUtente() {
return utente;
}
public void setUtente(Utente utente) {
this.utente = utente;
}
@Override
public String toString() {
return "FichaClinica [cod_ficha=" + cod_ficha + ", lista_atos_enf="
+ lista_atos_enf + ", lista_atos_medicos=" + lista_atos_medicos
+ ", lista_consultas=" + lista_consultas + "]";
}
public FichaClinica(Utente utente){
super();
this.utente=utente;
}
public FichaClinica(Utente utente,
ArrayList<AtoEnfermagem> lista_atos_enf,
ArrayList<AtoMedico> lista_atos_medicos,
ArrayList<Consulta> lista_consultas) {
super();
this.lista_atos_enf = lista_atos_enf;
this.lista_atos_medicos = lista_atos_medicos;
this.lista_consultas = lista_consultas;
}
//Adicionar elementos às listas
public int getCod_ficha() {
return cod_ficha;
}
public void setCod_ficha(int cod_ficha) {
this.cod_ficha = cod_ficha;
}
public List<AtoEnfermagem> getLista_atos_enf() {
return lista_atos_enf;
}
public void setLista_atos_enf(List<AtoEnfermagem> lista_atos_enf) {
this.lista_atos_enf = lista_atos_enf;
}
public List<AtoMedico> getLista_atos_medicos() {
return lista_atos_medicos;
}
public void setLista_atos_medicos(ArrayList<AtoMedico> lista_atos_medicos) {
this.lista_atos_medicos = lista_atos_medicos;
}
public List<Consulta> getLista_consultas() {
return lista_consultas;
}
public void setLista_consultas(ArrayList<Consulta> lista_consultas) {
this.lista_consultas = lista_consultas;
}
public void adicionar_ato_medico(AtoMedico a_medico){
lista_atos_medicos.add(a_medico);
}
public void adiconar_consulta(Consulta c){
lista_consultas.add(c);
}
public void adicionar_ato_enf(AtoEnfermagem a_enf){
lista_atos_enf.add(a_enf);
}
}
当我尝试执行以下方法时：
@Override
public String cria_utente(String nome_utente, String morada_utente,GregorianCalendar dnasc_utente, int tel_utente) {
Utente u=new Utente(nome_utente,morada_utente,dnasc_utente,tel_utente);
em.persist(u);
FichaClinica fc=new FichaClinica(u);
em.persist(fc);
return "Utente "+Integer.toString(u.getCod_utente())+" (Ficha Clinica "+Integer.toString(fc.getCod_ficha())+") cirado!";
}
发生错误。这是完整的堆栈跟踪：
Exception in thread "main" javax.ejb.EJBException: Transaction aborted
at com.sun.ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:725)
at com.sun.ejb.containers.EJBContainerTransactionManager.postInvokeTx(EJBContainerTransactionManager.java:503)
at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4566)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2074)
at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2044)
at com.sun.ejb.containers.EJBObjectInvocationHandler.invoke(EJBObjectInvocationHandler.java:212)
at com.sun.ejb.containers.EJBObjectInvocationHandlerDelegate.invoke(EJBObjectInvocationHandlerDelegate.java:79)
at com.sun.proxy.$Proxy238.cria_utente(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie.dispatchToMethod(ReflectiveTie.java:143)
at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:173)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatchToServant(ServerRequestDispatcherImpl.java:528)
at com.sun.corba.ee.impl.protocol.ServerRequestDispatcherImpl.dispatch(ServerRequestDispatcherImpl.java:199)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequestRequest(MessageMediatorImpl.java:1549)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:1425)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleInput(MessageMediatorImpl.java:930)
at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:213)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.handleRequest(MessageMediatorImpl.java:694)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.dispatch(MessageMediatorImpl.java:496)
at com.sun.corba.ee.impl.protocol.MessageMediatorImpl.doWork(MessageMediatorImpl.java:2222)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
at com.sun.corba.ee.impl.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
Caused by: javax.transaction.RollbackException: Transaction marked for rollback.
at com.sun.enterprise.transaction.JavaEETransactionImpl.commit(JavaEETransactionImpl.java:490)
at com.sun.enterprise.transaction.JavaEETransactionManagerSimplified.commit(JavaEETransactionManagerSimplified.java:854)
at com.sun.ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:719)
... 24 more
Caused by: javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLSyntaxErrorException: 'UTENTE_COD_UTENTE' is not a column in table or VTI 'APP.FICHACLINICA'.
Error Code: 20000
Call: INSERT INTO FICHACLINICA (COD_FICHA, UTENTE_COD_UTENTE) VALUES (?, ?)
bind => [2 parameters bound]
Query: InsertObjectQuery(FichaClinica [cod_ficha=10, lista_atos_enf={[]}, lista_atos_medicos={[]}, lista_consultas={[]}])
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl$1.handleException(EntityManagerSetupImpl.java:696)
at org.eclipse.persistence.transaction.AbstractSynchronizationListener.handleException(AbstractSynchronizationListener.java:275)
at org.eclipse.persistence.transaction.AbstractSynchronizationListener.beforeCompletion(AbstractSynchronizationListener.java:170)
at org.eclipse.persistence.transaction.JTASynchronizationListener.beforeCompletion(JTASynchronizationListener.java:68)
at com.sun.enterprise.transaction.JavaEETransactionImpl.commit(JavaEETransactionImpl.java:452)
... 26 more
Caused by: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLSyntaxErrorException: 'UTENTE_COD_UTENTE' is not a column in table or VTI 'APP.FICHACLINICA'.
Error Code: 20000
at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:340)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:682)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeCall(DatabaseAccessor.java:558)
at org.eclipse.persistence.internal.sessions.AbstractSession.basicExecuteCall(AbstractSession.java:2002)
at org.eclipse.persistence.sessions.server.ClientSession.executeCall(ClientSession.java:298)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:242)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:228)
at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.insertObject(DatasourceCallQueryMechanism.java:377)
at org.eclipse.persistence.internal.queries.StatementQueryMechanism.insertObject(StatementQueryMechanism.java:165)
at org.eclipse.persistence.internal.queries.StatementQueryMechanism.insertObject(StatementQueryMechanism.java:180)
at org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.insertObjectForWrite(DatabaseQueryMechanism.java:489)
at org.eclipse.persistence.queries.InsertObjectQuery.executeCommit(InsertObjectQuery.java:80)
at org.eclipse.persistence.queries.InsertObjectQuery.executeCommitWithChangeSet(InsertObjectQuery.java:90)
at org.eclipse.persistence.internal.queries.DatabaseQueryMechanism.executeWriteWithChangeSet(DatabaseQueryMechanism.java:301)
at org.eclipse.persistence.queries.WriteObjectQuery.executeDatabaseQuery(WriteObjectQuery.java:58)
at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:899)
at org.eclipse.persistence.queries.DatabaseQuery.executeInUnitOfWork(DatabaseQuery.java:798)
at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWorkObjectLevelModifyQuery(ObjectLevelModifyQuery.java:108)
at org.eclipse.persistence.queries.ObjectLevelModifyQuery.executeInUnitOfWork(ObjectLevelModifyQuery.java:85)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2896)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1804)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1786)
at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1737)
at org.eclipse.persistence.internal.sessions.CommitManager.commitNewObjectsForClassWithChangeSet(CommitManager.java:226)
at org.eclipse.persistence.internal.sessions.CommitManager.commitAllObjectsForClassWithChangeSet(CommitManager.java:193)
at org.eclipse.persistence.internal.sessions.CommitManager.commitAllObjectsWithChangeSet(CommitManager.java:138)
at org.eclipse.persistence.internal.sessions.AbstractSession.writeAllObjectsWithChangeSet(AbstractSession.java:4207)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabase(UnitOfWorkImpl.java:1441)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.commitToDatabaseWithChangeSet(UnitOfWorkImpl.java:1531)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.issueSQLbeforeCompletion(UnitOfWorkImpl.java:3168)
at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.issueSQLbeforeCompletion(RepeatableWriteUnitOfWork.java:352)
at org.eclipse.persistence.transaction.AbstractSynchronizationListener.beforeCompletion(AbstractSynchronizationListener.java:158)
... 28 more
Caused by: java.sql.SQLSyntaxErrorException: 'UTENTE_COD_UTENTE' is not a column in table or VTI 'APP.FICHACLINICA'.
at org.apache.derby.client.am.SQLExceptionFactory40.getSQLException(Unknown Source)
at org.apache.derby.client.am.SqlException.getSQLException(Unknown Source)
at org.apache.derby.client.am.Connection.prepareStatement(Unknown Source)
at com.sun.gjc.spi.base.ConnectionHolder.prepareStatement(ConnectionHolder.java:586)
at com.sun.gjc.spi.jdbc40.ConnectionWrapper40.prepareCachedStatement(ConnectionWrapper40.java:255)
at com.sun.gjc.spi.jdbc40.ConnectionWrapper40.prepareCachedStatement(ConnectionWrapper40.java:52)
at com.sun.gjc.spi.ManagedConnectionImpl.prepareCachedStatement(ManagedConnectionImpl.java:992)
at com.sun.gjc.spi.jdbc40.ConnectionWrapper40.prepareStatement(ConnectionWrapper40.java:173)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.prepareStatement(DatabaseAccessor.java:1556)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.prepareStatement(DatabaseAccessor.java:1505)
at org.eclipse.persistence.internal.databaseaccess.DatabaseCall.prepareStatement(DatabaseCall.java:778)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.basicExecuteCall(DatabaseAccessor.java:619)
... 58 more
Caused by: org.apache.derby.client.am.SqlException: 'UTENTE_COD_UTENTE' is not a column in table or VTI 'APP.FICHACLINICA'.
at org.apache.derby.client.am.Statement.completeSqlca(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.parsePrepareError(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.parsePRPSQLSTTreply(Unknown Source)
at org.apache.derby.client.net.NetStatementReply.readPrepareDescribeOutput(Unknown Source)
at org.apache.derby.client.net.StatementReply.readPrepareDescribeOutput(Unknown Source)
at org.apache.derby.client.net.NetStatement.readPrepareDescribeOutput_(Unknown Source)
at org.apache.derby.client.am.Statement.readPrepareDescribeOutput(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.readPrepareDescribeInputOutput(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.flowPrepareDescribeInputOutput(Unknown Source)
at org.apache.derby.client.am.PreparedStatement.prepare(Unknown Source)
at org.apache.derby.client.am.Connection.prepareStatementX(Unknown Source)
... 68 more
有人可以帮助我找到这里的错误吗？
答案 0 :(得分：1)
发生错误是因为您可能没有在表UTENTE_COD_UTENTE中创建列APP.FICHACLINICA。创建列（类型整数）应解决问题。
代码：
@OneToOne
@JoinColumn
private Utente utente;
没有为连接列指定名称，因此会根据此规则（来自@JoinColumn）创建默认连接列：
默认值（仅在使用单个连接列时适用）： 连接以下内容：引用的名称 关系属性或引用实体的字段或可嵌入的 类; ＆＃34; ＆＃34 ;;引用的主键列的名称。如果有 在实体中没有这样的引用关系属性或字段，或 如果连接用于元素集合，则连接列名称为 形成如下的串联：实体的名称; ＆＃34; ＆＃34 ;;引用的主键列的名称。
您可以为连接列设置名称，如下所示：
@OneToOne
@JoinColumn(name = "SOMETHING_UTENTE")
private Utente utente;
但是，您必须创建一个名为this的列。
另见：