我正在使用Spring Data JPA和一个用于记录管理系统的MySQL数据库。下面是我建模的两个实体，我正在尝试将策略记录保存到数据库中：
政策实体：
public class Policy {
private String policyNumber;
private String policyName;
private Steward steward;
private PolicyHolder policyHolder;
@Id
@Column(length = 30)
public String getPolicyNumber() {
return policyNumber;
}
public void setPolicyNumber(String policyNumber) {
this.policyNumber = policyNumber;
}
@Column(length = 80)
public String getPolicyName() {
return policyName;
}
public void setPolicyName(String policyName) {
this.policyName = policyName;
}
@OneToOne(cascade = ALL, mappedBy = "policy", orphanRemoval = true, optional = false)
public PolicyHolder getPolicyHolder() {
return policyHolder;
}
}
PolicyHolder实体：
@Entity
public class PolicyHolder extends PolicyMember {
private Policy policy;
public PolicyHolder() {
super();
}
@OneToOne
@JoinColumn(name = "policy_policyNumber", referencedColumnName = "policyNumber")
public Policy getPolicy() {
return policy;
}
public void setPolicy(Policy policy) {
this.policy = policy;
}
@Override
public String toString() {
return "PolicyHolder{" +
"policy=" + policy +
"} " + super.toString();
}
}
PolicyMember实体：
@Entity
public abstract class PolicyMember {
private CompositePolicyMemberPK policyMemberId;
private String firstname;
private String surname;
private LocalDate dateOfDeath;
private LocalDate dateOfBirth;
private MemberStatus status;
private BillingStatus billingStatus;
private String nationalId;
private LocalDateTime creationDate;
private Gender gender;
private String msisdn;
private LocalDate closureDate;
private String createdBy;
private String memberType;
private PackageBenefit packageBenefit;
private List<DependantTransferRequest> transferRequests;
@EmbeddedId
public CompositePolicyMemberPK getPolicyMemberId() {
return policyMemberId;
}
public void setPolicyMemberId(CompositePolicyMemberPK policyMemberId) {
this.policyMemberId = policyMemberId;
}
@Column(length = 50)
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
@Column(length = 50)
public String getSurname() {
return surname;
}
public void setSurname(String surname) {
this.surname = surname;
}
@Convert(converter = MemberStatusConverter.class)
public MemberStatus getStatus() {
return status;
}
public void setStatus(MemberStatus status) {
this.status = status;
}
@Convert(converter = BillingStatusConverter.class)
public BillingStatus getBillingStatus() {
return billingStatus;
}
public void setBillingStatus(BillingStatus billingStatus) {
this.billingStatus = billingStatus;
}
@Column(length = 20)
public String getNationalId() {
return nationalId;
}
public void setNationalId(String nationalId) {
this.nationalId = nationalId;
}
@Enumerated(EnumType.STRING)
public Gender getGender() {
return gender;
}
public void setGender(Gender gender) {
this.gender = gender;
}
@Column(length = 15)
public String getMsisdn() {
return msisdn;
}
public void setMsisdn(String msisdn) {
this.msisdn = msisdn;
}
@Column(length = 50)
public String getCreatedBy() {
return createdBy;
}
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
}
@Column(name = "memberType", insertable = false, updatable = false)
public String getMemberType() {
return memberType;
}
public void setMemberType(String memberType) {
this.memberType = memberType;
}
@OneToOne(mappedBy = "policyMember", optional = false, cascade = CascadeType.ALL)
public PackageBenefit getPackageBenefit() {
return packageBenefit;
}
public void setPackageBenefit(PackageBenefit packageBenefit) {
this.packageBenefit = packageBenefit;
}
public LocalDate getDateOfDeath() {
return dateOfDeath;
}
public void setDateOfDeath(LocalDate dateOfDeath) {
this.dateOfDeath = dateOfDeath;
}
public LocalDate getDateOfBirth() {
return dateOfBirth;
}
public void setDateOfBirth(LocalDate dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
public LocalDate getClosureDate() {
return closureDate;
}
public void setClosureDate(LocalDate closureDate) {
this.closureDate = closureDate;
}
public LocalDateTime getCreationDate() {
return creationDate;
}
public void setCreationDate(LocalDateTime creationDate) {
this.creationDate = creationDate;
}
@OneToMany(orphanRemoval = true, mappedBy = "dependantToTransfer")
public List<DependantTransferRequest> getTransferRequests() {
return transferRequests;
}
public void setTransferRequests(List<DependantTransferRequest> transferRequests) {
this.transferRequests = transferRequests;
}
}
复合键：
@Embeddable
public class CompositePolicyMemberPK implements Serializable {
private String policyNumber;
private String suffixNumber;
private static final long serialVersionUID = 1L;
public CompositePolicyMemberPK(String policyNumber, String suffixNumber) {
super();
this.policyNumber = policyNumber;
this.suffixNumber = suffixNumber;
}
public CompositePolicyMemberPK() {
super();
}
@Column(length = 30)
public String getPolicyNumber() {
return this.policyNumber;
}
public void setPolicyNumber(String policyNumber) {
this.policyNumber = policyNumber;
}
@Column(length = 2)
public String getSuffixNumber() {
return this.suffixNumber;
}
public void setSuffixNumber(String suffixNumber) {
this.suffixNumber = suffixNumber;
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof CompositePolicyMemberPK)) {
return false;
}
CompositePolicyMemberPK other = (CompositePolicyMemberPK) o;
return (getPolicyNumber() == null ? other.getPolicyNumber() == null : getPolicyNumber().equals(other.getPolicyNumber())) && (getSuffixNumber() == null ? other.getSuffixNumber() == null : getSuffixNumber().equals(other.getSuffixNumber()));
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (getPolicyNumber() == null ? 0 : getPolicyNumber().hashCode());
result = prime * result + (getSuffixNumber() == null ? 0 : getSuffixNumber().hashCode());
return result;
}
@Override
public String toString() {
return this.getPolicyNumber() + "-" + this.getSuffixNumber();
}
}
负责保留策略的代码如下：
public Subscriber addMemberToSteward(Long stewardId, Subscriber subscriber) {
Steward steward = this.findStewardById(stewardId);
if(steward == null){
throw new EcosureException(String.format("No steward found with id '%s'.",stewardId));
}
final BillingStatus billingStatus = BillingStatus.REG_IN_PROGRESS;
final MemberStatus memberStatus = MemberStatus.NEW;
final ProductPackage product = productService.findPackageById(subscriber.getProductPackageId());
subscriber.setNationalId(nationalIDNumberUtils.formatIdNumber(subscriber.getNationalId()));
final PolicyHolder policyHolder = convertToPolicyHolder(subscriber, product, billingStatus, memberStatus);
Policy policy = getPolicyFromSubscriberInfo(subscriber, policyHolder);
policy.setSteward(steward);
policy.setStatus(PolicyStatus.NEW);
System.out.println("Policy Holder" + policyHolder);
policyRepository.save(policy);
return subscriber;
}
getPolicyFromSubscriberInfo方法如下：
私有策略getPolicyFromSubscriberInfo（最终订阅者subscriberInfo，最终PolicyHolder policyHolder）抛出{
final Policy policy = new Policy();
policy.setMsisdn(subscriberInfo.getMsisdn());
policy.setPolicyNumber(policyNumberGenerator.getNextPolicyNumber());
policy.setPolicyName(policyHolder.getFirstname() + " " + policyHolder.getSurname());
policyHolder.setPolicy(policy);
CompositePolicyMemberPK policyMemberId = new CompositePolicyMemberPK();
policyMemberId.setPolicyNumber(policy.getPolicyNumber());
policyMemberId.setSuffixNumber(policyNumberGenerator.getNextSuffix(policy.getPolicyNumber(),true));
policyHolder.setPolicyMemberId(policyMemberId);
policy.setPolicyHolder(policyHolder);
return policy;
}
PolicyRepository如下所示：
public interface PolicyRepository extends JpaRepository<Policy, String> {
}
当我尝试保留Policy实体时，我收到以下错误：
2016-12-09 09:47:43,461 ERROR [io.undertow.request] (default task-15) UT005023: Exception handling request to /ecosure-api/api/v3/stewards/243/policies: org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.orm.jpa.JpaSystemException: org.hibernate.PersistentObjectException: uninitialized proxy passed to persist(); nested exception is javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: uninitialized proxy passed to persist()
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:86)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:130)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:115)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at com.econetwireless.ecosure.api.filters.AuthenticationTokenFilter.doFilter(AuthenticationTokenFilter.java:60)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:121)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)
at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)
at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:132)
at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:85)
at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58)
at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:72)
at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:282)
at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:261)
at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:80)
at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:172)
at io.undertow.server.Connectors.executeRootHandler(Connectors.java:199)
at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:774)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.orm.jpa.JpaSystemException: org.hibernate.PersistentObjectException: uninitialized proxy passed to persist(); nested exception is javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: uninitialized proxy passed to persist()
at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:418)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:492)
at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59)
at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:147)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy1272.save(Unknown Source)
at com.econetwireless.ecosure.service.stewards.StewardServiceImpl.addMemberToSteward(StewardServiceImpl.java:115)
at com.econetwireless.ecosure.api.controllers.StewardController.addMemberToGroup(StewardController.java:91)
at com.econetwireless.ecosure.api.controllers.StewardController$$FastClassBySpringCGLIB$$69e389b2.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:720)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.security.access.intercept.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:69)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655)
at com.econetwireless.ecosure.api.controllers.StewardController$$EnhancerBySpringCGLIB$$2d501d51.addMemberToGroup(<generated>)
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 org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
... 65 more
Caused by: javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: uninitialized proxy passed to persist()
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1692)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1602)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1608)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1152)
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 org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:298)
at com.sun.proxy.$Proxy1267.persist(Unknown Source)
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:506)
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 org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:503)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:488)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:460)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
... 95 more
Caused by: org.hibernate.PersistentObjectException: uninitialized proxy passed to persist()
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:80)
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:768)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:761)
at org.hibernate.jpa.event.internal.core.JpaPersistEventListener$1.cascade(JpaPersistEventListener.java:80)
at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:391)
at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:316)
at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:155)
at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:104)
at org.hibernate.event.internal.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:414)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:252)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:182)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:125)
at org.hibernate.jpa.event.internal.core.JpaPersistEventListener.saveWithGeneratedId(JpaPersistEventListener.java:67)
at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:189)
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:132)
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:58)
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:778)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:751)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:756)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1146)
任何人都可以帮助我找出我出错的地方。