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Hibernate java.sql.SQLException:无法添加或更新子行：外键约束失败

hibernate

Hibernate java.sql.SQLException:无法添加或更新子行：外键约束失败,hibernate,annotations,sqlexception,Hibernate,Annotations,Sqlexception,有人能帮我理解为什么我在尝试持久化服务提供商实体时会出现以下错误吗 java.sql.SQLException: Cannot add or update a child row: a foreign key constraint fails (`springmvc/businesslocation`, CONSTRAINT `FK5CB747B5A26ED80E` FOREIGN KEY (`state_id`) REFERENCES `state` (`id`)) at com.mysql

有人能帮我理解为什么我在尝试持久化服务提供商实体时会出现以下错误吗

java.sql.SQLException: Cannot add or update a child row: a foreign key constraint fails (`springmvc/businesslocation`, CONSTRAINT `FK5CB747B5A26ED80E` FOREIGN KEY (`state_id`) REFERENCES `state` (`id`))
 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2975)
 at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1600)
 at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1129)
 at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:681)
 at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1368)
 at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1283)
 at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1268)
 at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102)
 at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:72)
 at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33)
 at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2163)
 at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2643)
 at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
 at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
 at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
 at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
 at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:94)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
 at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:511)
 at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:503)
 at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:218)
 at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268)
 at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216)
 at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
 at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:296)
 at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:242)
 at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:219)
 at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
 at org.hibernate.engine.Cascade.cascade(Cascade.java:130)
 at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:456)
 at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:334)
 at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
 at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
 at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
 at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
 at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
 at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:539)
 at org.hibernate.impl.SessionImpl.save(SessionImpl.java:527)
 at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
 at org.springframework.orm.hibernate3.HibernateTemplate$12.doInHibernate(HibernateTemplate.java:642)
 at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:373)
 at org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:639)
 at com.inception.dao.ServiceProviderDAOImpl.save(ServiceProviderDAOImpl.java:23)
 at com.inception.service.ServiceProviderServiceImpl.addServiceProvider(ServiceProviderServiceImpl.java:21)
 at com.inception.web.RegisterServiceProviderController.processFinish(RegisterServiceProviderController.java:68)
 at org.springframework.web.servlet.mvc.AbstractWizardFormController.validatePagesAndFinish(AbstractWizardFormController.java:642)
 at org.springframework.web.servlet.mvc.AbstractWizardFormController.processFormSubmission(AbstractWizardFormController.java:492)
 at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:265)
 at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
 at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809)
 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:476)
 at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:441)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
 at java.lang.Thread.run(Thread.java:619)
情况是这样的：服务提供商有一个BusinessLocation列表，而州有一个BusinessLocation列表

@ManyToOne(cascade=CascadeType.ALL)
@JoinColumn(name="state_id")
public State getState() {
    return state;
}
我希望持久化以下带注释的类： ServiceProvider.java

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;

@Entity
public class ServiceProvider implements Serializable{

 private Long id; 
 private Set<BusinessLocation> businessLocations = new HashSet<BusinessLocation>();

 @Id
 @GeneratedValue
 public Long getId() {
  return id;
 }
 public void setId(Long id) {
  this.id = id;
 }

 @OneToMany(mappedBy="serviceProvider", targetEntity=BusinessLocation.class, cascade=CascadeType.ALL, fetch=FetchType.EAGER)
 public Set<BusinessLocation> getBusinessLocations() {
  return businessLocations;
 }

 public void setBusinessLocations(Set<BusinessLocation> businessLocations) {
  this.businessLocations = businessLocations;
 }

}

import java.io.Serializable;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;

@Entity
public class BusinessLocation implements Serializable{

 private Long id;
 private String address;
 private String city;
 private State state;
 private String pincode;
 private ServiceProvider serviceProvider;

 public BusinessLocation() {  
 }

 @Id
 @GeneratedValue
 public Long getId() {
  return id;
 }
 public void setId(Long id) {
  this.id = id;
 }
 public String getAddress() {
  return address;
 }
 public void setAddress(String address) {
  this.address = address;
 }
 public String getCity() {
  return city;
 }
 public void setCity(String city) {
  this.city = city;
 }

 @ManyToOne
 @JoinColumn(name="state_id")
 public State getState() {
  return state;
 }
 public void setState(State state) {
  this.state = state;
 } 
 public void setPincode(String pincode) {
  this.pincode = pincode;
 }

 public String getPincode() {
  return pincode;
 }

 @ManyToOne
 @JoinColumn(name="serviceProvider_id")
 public ServiceProvider getServiceProvider() {
  return serviceProvider;
 }
 public void setServiceProvider(ServiceProvider serviceProvider) {
  this.serviceProvider = serviceProvider;
 }
}

@Entity
public class State implements Serializable {

 private Long id;
 private String name;
 private List<BusinessLocation> businessLocations;

 @Id
 @GeneratedValue 
 public Long getId() {
  return id;
 }
 public void setId(Long id) {
  this.id = id;
 }
 public void setName(String name) {
  this.name = name;
 }

 public String getName() {
  return name;
 }


 @OneToMany(mappedBy="state", targetEntity=BusinessLocation.class, cascade=CascadeType.ALL, fetch=FetchType.EAGER)
 public List<BusinessLocation> getBusinessLocations() {
  return businessLocations;
 }
 public void setBusinessLocations(List<BusinessLocation> businessLocations) {
  this.businessLocations = businessLocations;
 } 

}
State.java

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.OneToMany;

@Entity
public class ServiceProvider implements Serializable{

 private Long id; 
 private Set<BusinessLocation> businessLocations = new HashSet<BusinessLocation>();

 @Id
 @GeneratedValue
 public Long getId() {
  return id;
 }
 public void setId(Long id) {
  this.id = id;
 }

 @OneToMany(mappedBy="serviceProvider", targetEntity=BusinessLocation.class, cascade=CascadeType.ALL, fetch=FetchType.EAGER)
 public Set<BusinessLocation> getBusinessLocations() {
  return businessLocations;
 }

 public void setBusinessLocations(Set<BusinessLocation> businessLocations) {
  this.businessLocations = businessLocations;
 }

}

import java.io.Serializable;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;

@Entity
public class BusinessLocation implements Serializable{

 private Long id;
 private String address;
 private String city;
 private State state;
 private String pincode;
 private ServiceProvider serviceProvider;

 public BusinessLocation() {  
 }

 @Id
 @GeneratedValue
 public Long getId() {
  return id;
 }
 public void setId(Long id) {
  this.id = id;
 }
 public String getAddress() {
  return address;
 }
 public void setAddress(String address) {
  this.address = address;
 }
 public String getCity() {
  return city;
 }
 public void setCity(String city) {
  this.city = city;
 }

 @ManyToOne
 @JoinColumn(name="state_id")
 public State getState() {
  return state;
 }
 public void setState(State state) {
  this.state = state;
 } 
 public void setPincode(String pincode) {
  this.pincode = pincode;
 }

 public String getPincode() {
  return pincode;
 }

 @ManyToOne
 @JoinColumn(name="serviceProvider_id")
 public ServiceProvider getServiceProvider() {
  return serviceProvider;
 }
 public void setServiceProvider(ServiceProvider serviceProvider) {
  this.serviceProvider = serviceProvider;
 }
}

@Entity
public class State implements Serializable {

 private Long id;
 private String name;
 private List<BusinessLocation> businessLocations;

 @Id
 @GeneratedValue 
 public Long getId() {
  return id;
 }
 public void setId(Long id) {
  this.id = id;
 }
 public void setName(String name) {
  this.name = name;
 }

 public String getName() {
  return name;
 }


 @OneToMany(mappedBy="state", targetEntity=BusinessLocation.class, cascade=CascadeType.ALL, fetch=FetchType.EAGER)
 public List<BusinessLocation> getBusinessLocations() {
  return businessLocations;
 }
 public void setBusinessLocations(List<BusinessLocation> businessLocations) {
  this.businessLocations = businessLocations;
 } 

}

@实体
公共类状态实现可序列化{
私人长id；
私有字符串名称；
私人名单业务地点；
@身份证
@生成值
公共长getId（）{
返回id；
}
公共无效集合id（长id）{
this.id=id；
}
公共void集合名（字符串名）{
this.name=名称；
}
公共字符串getName（）{
返回名称；
}
@OneToMany（mappedBy=“state”，targetEntity=BusinessLocation.class，cascade=CascadeType.ALL，fetch=FetchType.EAGER）
公共列表getBusinessLocations（）{
返回营业地点；
}
公共业务地点（列出业务地点）{
this.businessLocations=businessLocations；
} 
}
期待有人把我从我可能犯的错误中唤醒。
谢谢。

映射看起来是正确的，如果显示您实际尝试持久化
ServiceProvider
实例的代码，将会非常有趣

特别是，我会特别注意各种双向关联，以确保在持续之前正确设置“两边的链接”

实际上，您可能需要为此创建链接管理方法，例如在
ServiceProvider
中：

@Entity
public class ServiceProvider implements Serializable{
    private Long id; 
    private Set<BusinessLocation> businessLocations = new HashSet<BusinessLocation>();

    @Id @GeneratedValue
    public Long getId() {
      return id;
    }
    public void setId(Long id) {
      this.id = id;
    }

    @OneToMany(mappedBy="serviceProvider", targetEntity=BusinessLocation.class, cascade=CascadeType.ALL, fetch=FetchType.EAGER)
    public Set<BusinessLocation> getBusinessLocations() {
      return businessLocations;
    }

    public void setBusinessLocations(Set<BusinessLocation> businessLocations) {
      this.businessLocations = businessLocations;
    }

    public void addToBusinessLocations(BusinessLocation businessLocation) {
      this.getBusinessLocations().add(businessLocation);
      businessLocation.setServiceProvider(this);
    }

    public void removeFromBusinessLocations(BusinessLocation businessLocation) {
      this.getBusinessLocations().remove(businessLocation);
      businessLocation.setServiceProvider(null);
    }        
}

@实体
公共类ServiceProvider实现可序列化{
私人长id；
private Set businessLocations=new HashSet（）；
@Id@GeneratedValue
公共长getId（）{
返回id；
}
公共无效集合id（长id）{
this.id=id；
}
@OneToMany（mappedBy=“serviceProvider”，targetEntity=BusinessLocation.class，cascade=CascadeType.ALL，fetch=FetchType.EAGER）
公共集getBusinessLocations（）{
返回营业地点；
}
公共业务地点（设置业务地点）{
this.businessLocations=businessLocations；
}
public void addtobusinesslocation（BusinessLocation BusinessLocation）{
this.getBusinessLocations（）.add（businessLocation）；
businessLocation.setServiceProvider（此）；
}
从BusinessLocations（BusinessLocation BusinessLocation）移除公共无效信息{
this.getBusinessLocations（）.remove（businessLocation）；
businessLocation.setServiceProvider（空）；
}        
}
在
状态下也是一样的


未正确设置链接的两侧可能是问题的原因。
谢谢您的回复。我认为这个错误是因为我无意中试图覆盖Hibernate在视图中为select标记设置的路径中创建的ID

以下是我的服务和dao类的代码：
ServiceProviderServiceImpl


@Transactional
public class ServiceProviderServiceImpl implements ServiceProviderService{

    private ServiceProviderDAO serviceProviderDAO;
    public void setServiceProviderDAO(ServiceProviderDAO serviceProviderDAO) {
        this.serviceProviderDAO = serviceProviderDAO;
    }

    public void addServiceProvider(ServiceProvider serviceProvider) {
        serviceProviderDAO.save(serviceProvider);
        for(BusinessLocation businessLocation: serviceProvider.getBusinessLocations()) {
            businessLocation.setServiceProvider(serviceProvider);
            serviceProviderDAO.save(businessLocation);
        }

    }

}


ServiceProviderDAOImpl
公共类ServiceProviderDAOImpl实现ServiceProviderDAO{


    private HibernateTemplate hibernateTemplate;
    public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {
        this.hibernateTemplate = hibernateTemplate;
    }

    public void save(ServiceProvider serviceProvider) {
        hibernateTemplate.saveOrUpdate(serviceProvider);        
    }

    public void save(BusinessLocation businessLocation) {
        hibernateTemplate.saveOrUpdate(businessLocation);       
    }

}


但一旦我解决了这个问题，我开始出现以下错误：


org.springframework.dao.InvalidDataAccessApiUsageException: object references an unsaved transient instance - save the transient instance before flushing: com.inception.domain.State; nested exception is org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.inception.domain.State
   at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:634)
   at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
   at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:378)
   at org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:639)
   at com.inception.dao.ServiceProviderDAOImpl.save(ServiceProviderDAOImpl.java:23)
   at com.inception.service.ServiceProviderServiceImpl.addServiceProvider(ServiceProviderServiceImpl.java:21)
   at com.inception.web.RegisterServiceProviderController.processFinish(RegisterServiceProviderController.java:68)
   at org.springframework.web.servlet.mvc.AbstractWizardFormController.validatePagesAndFinish(AbstractWizardFormController.java:642)
   at org.springframework.web.servlet.mvc.AbstractWizardFormController.processFormSubmission(AbstractWizardFormController.java:492)
   at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:265)
   at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
   at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
   at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875)
   at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:809)
   at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:476)
   at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:441)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
   at java.lang.Thread.run(Thread.java:619)
Caused by: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.inception.domain.State
   at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:219)
   at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397)
   at org.hibernate.type.ManyToOneType.isDirty(ManyToOneType.java:242)
   at org.hibernate.type.TypeFactory.findDirty(TypeFactory.java:596)
   at org.hibernate.persister.entity.AbstractEntityPersister.findDirty(AbstractEntityPersister.java:3128)
   at org.hibernate.event.def.DefaultFlushEntityEventListener.dirtyCheck(DefaultFlushEntityEventListener.java:478)
   at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:204)
   at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:127)
   at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)
   at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
   at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
   at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1004)
   at org.springframework.orm.hibernate3.HibernateAccessor.flushIfNecessary(HibernateAccessor.java:390)
   at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:374)
   ... 27 more


我通过在实体BusinessLocation.java中将cascade属性设置为（cascade=CascadeType.ALL）解决了这个问题


@ManyToOne(cascade=CascadeType.ALL)
@JoinColumn(name="state_id")
public State getState() {
    return state;
}


非常感谢您的回复：）