我想创建一个EJB项目。我试图通过几个实体反向创建一个数据库。发生了一些错误，但我找不到它只是可以导航错误在Property.java。你们能帮我看一下吗。谢谢!
这是一个Property.java文件: package fit5042.tutex.repository.entities;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Embedded;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
@Entity(name = "property_bidirectional_onetomany")
@NamedQueries({
@NamedQuery(name = Property.GET_ALL_QUERY_NAME, query = "SELECT p FROM Property p"),
@NamedQuery(name = Property.GET_PROPERTY_SET_BY_CONTACT_PERSON, query="SELECT p FROM Property p WHERE p.contactPerson = :contactPerson")})
public class Property implements Serializable {
public static final String GET_ALL_QUERY_NAME = "Property.getAll";
public static final String GET_PROPERTY_SET_BY_CONTACT_PERSON = "Property.getPropertySetByContactPerson";
@Id
@Column
private int propertyId;
private double size;
private int numberOfBedrooms;
private double price;
@Embedded
private Address address;
@ManyToOne(cascade = {CascadeType.PERSIST, CascadeType.MERGE})
@JoinColumn(name = "owner_contactPersonId", nullable = false)
private ContactPerson contactPerson;
@OneToMany(fetch = FetchType.EAGER)
private Set<String> tags;
public Property() {
this.tags = new HashSet<>();
}
public Property(int propertyId, Address address, int numberOfBedrooms, double size, double price, ContactPerson contactPerson, Set<String> tags) {
this.propertyId = propertyId;
this.address = address;
this.size = size;
this.numberOfBedrooms = numberOfBedrooms;
this.price = price;
this.contactPerson = contactPerson;
this.tags = tags;
}
public int getPropertyId() {
return propertyId;
}
public void setPropertyId(int propertyId) {
this.propertyId = propertyId;
}
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
public double getSize() {
return size;
}
public void setSize(double size) {
this.size = size;
}
public int getNumberOfBedrooms() {
return numberOfBedrooms;
}
public void setNumberOfBedrooms(int numberOfBedrooms) {
this.numberOfBedrooms = numberOfBedrooms;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public ContactPerson getContactPerson() {
return contactPerson;
}
public void setContactPerson(ContactPerson contactPerson) {
this.contactPerson = contactPerson;
}
public Set<String> getTags() {
return tags;
}
public void setTags(Set<String> tags) {
this.tags = tags;
}
@Override
public String toString() {
return "Property{" + "propertyId=" + propertyId + ", size=" + size + ", numberOfBedrooms=" + numberOfBedrooms + ", price=" + price + ", address=" + address + ", contactPerson=" + contactPerson + ", tags=" + tags + '}';
}
}
例外:
evere: Exception while preparing the app : Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [RealEstateAgencyPU] failed.
Internal Exception: Exception [EclipseLink-7250] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: [class fit5042.tutex.repository.entities.Property] uses a non-entity [class java.lang.String] as target entity in the relationship attribute [field tags].
javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [RealEstateAgencyPU] failed.
Internal Exception: Exception [EclipseLink-7250] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: [class fit5042.tutex.repository.entities.Property] uses a non-entity [class java.lang.String] as target entity in the relationship attribute [field tags].
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.createPredeployFailedPersistenceException(EntityManagerSetupImpl.java:1954)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1945)
at org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactory(PersistenceProvider.java:322)
at org.glassfish.persistence.jpa.PersistenceUnitLoader.loadPU(PersistenceUnitLoader.java:199)
at org.glassfish.persistence.jpa.PersistenceUnitLoader.<init>(PersistenceUnitLoader.java:107)
at org.glassfish.persistence.jpa.JPADeployer$1.visitPUD(JPADeployer.java:223)
at org.glassfish.persistence.jpa.JPADeployer$PersistenceUnitDescriptorIterator.iteratePUDs(JPADeployer.java:510)
at org.glassfish.persistence.jpa.JPADeployer.createEMFs(JPADeployer.java:230)
at org.glassfish.persistence.jpa.JPADeployer.prepare(JPADeployer.java:168)
at com.sun.enterprise.v3.server.ApplicationLifecycle.prepareModule(ApplicationLifecycle.java:925)
at org.glassfish.javaee.full.deployment.EarDeployer.prepareBundle(EarDeployer.java:309)
at org.glassfish.javaee.full.deployment.EarDeployer.access$200(EarDeployer.java:88)
at org.glassfish.javaee.full.deployment.EarDeployer$1.doBundle(EarDeployer.java:155)
at org.glassfish.javaee.full.deployment.EarDeployer$1.doBundle(EarDeployer.java:152)
at org.glassfish.javaee.full.deployment.EarDeployer.doOnBundles(EarDeployer.java:232)
at org.glassfish.javaee.full.deployment.EarDeployer.doOnAllTypedBundles(EarDeployer.java:241)
at org.glassfish.javaee.full.deployment.EarDeployer.doOnAllBundles(EarDeployer.java:267)
at org.glassfish.javaee.full.deployment.EarDeployer.prepare(EarDeployer.java:152)
at com.sun.enterprise.v3.server.ApplicationLifecycle.prepareModule(ApplicationLifecycle.java:925)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:434)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:219)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:491)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:539)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2$1.run(CommandRunnerImpl.java:535)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:360)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$2.execute(CommandRunnerImpl.java:534)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:565)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$3.run(CommandRunnerImpl.java:557)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:360)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:556)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.doCommand(CommandRunnerImpl.java:1464)
at com.sun.enterprise.v3.admin.CommandRunnerImpl.access$1300(CommandRunnerImpl.java:109)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1846)
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext.execute(CommandRunnerImpl.java:1722)
at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:534)
at com.sun.enterprise.v3.admin.AdminAdapter.onMissingResource(AdminAdapter.java:224)
at org.glassfish.grizzly.http.server.StaticHttpHandlerBase.service(StaticHttpHandlerBase.java:189)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:745)
Caused by: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.EntityManagerSetupException
Exception Description: Predeployment of PersistenceUnit [RealEstateAgencyPU] failed.
Internal Exception: Exception [EclipseLink-7250] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: [class fit5042.tutex.repository.entities.Property] uses a non-entity [class java.lang.String] as target entity in the relationship attribute [field tags].
at org.eclipse.persistence.exceptions.EntityManagerSetupException.predeployFailed(EntityManagerSetupException.java:230)
... 58 more
Caused by: Exception [EclipseLink-7250] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.ValidationException
Exception Description: [class fit5042.tutex.repository.entities.Property] uses a non-entity [class java.lang.String] as target entity in the relationship attribute [field tags].
at org.eclipse.persistence.exceptions.ValidationException.nonEntityTargetInRelationship(ValidationException.java:1378)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.RelationshipAccessor.getReferenceDescriptor(RelationshipAccessor.java:553)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.RelationshipAccessor.processJoinTable(RelationshipAccessor.java:720)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.OneToManyAccessor.processManyToManyMapping(OneToManyAccessor.java:198)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.OneToManyAccessor.process(OneToManyAccessor.java:147)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProject.processOwningRelationshipAccessors(MetadataProject.java:1580)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProject.processStage3(MetadataProject.java:1833)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processORMMetadata(MetadataProcessor.java:580)
at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:585)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1869)
... 56 more
我认为问题在这个片段:
@OneToMany(fetch = FetchType.EAGER)
private Set<String> tags;
试图与String类建立关系是没有意义的。