Question

我正在学习spring-hibernate并试图让我的Web服务正常工作，但现在我已经陷入了这种状况。我的服务是为了让数据运行良好，但是当我试图发布这种情况时：

我已经使用了@generated value annotation
尝试修改它的类型如：GenerationType.SEQUENCE，IDENTITY等（它们都不起作用）

到目前为止，我最好的猜测，所以这是我的代码

这是我的模型类（它的一部分），另一个是典型的电子邮件，电话等。它与另一个表没有任何关系，我的数据库上只有一个表，顺便说一句，我使用ms sql server

@Entity
@Table(name="Patient")
@SuppressWarnings("serial")
public class Patient implements Serializable {

    @Id
    @GenericGenerator(name = "guidGenerator", strategy = "guid")
    @GeneratedValue( generator= "guidGenerator")
    @Column(name = "PatientGUID", columnDefinition="uniqueidentifier")
    private String patientGuid;
    private String firstName;
    private String lastName;

    public String getPatientGuid() {
       return patientGuid;
    }

    public void setPatientGuid(String patientGuid) {
       this.patientGuid = patientGuid;
    }

    public void setFirstName(String firstName) {
       this.firstName = firstName;
    }

    public String getLastName() {
       return lastName;
    }

    public void setLastName(String lastName) {
       this.lastName = lastName;
    }
}

修改：我的hbm文件

 <hibernate-mapping package="training.model">
 <class name="Patient" table="Patient">     
    <id name="patientGuid" type="string">
        <column name="PatientGUID" />
        <generator class="assigned" />
    </id>

    <property name="practiceGuid" type="string">
        <column name="PracticeGUID" sql-type="varchar" length="38" not-null="true" />
    </property>
    <property name="firstName" type="string">
        <column name="FirstName" sql-type="varchar" length="30" not-null="true" />
    </property>

    <property name="lastName" type="string">
        <column name="LastName" sql-type="varchar" length="30" not-null="true" />
    </property>
</class>
</hibernate-mapping>

我相信导致这个问题的表格细节是： PatientGUID ，它的类型是 UNIQUEIDENTIFIER ，当我执行我的webservice并请求POST方法发布我的病人时我得到了错误，即：

此类的ID

所以，我真的需要帮助，我做错了什么或者我错过了什么？如果您需要有关我的代码的更多详细信息，请发表评论，谢谢

编辑：错误消息

Caused by: org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): training.model.Patient at org.hibernate.id.Assigned.generate(Assigned.java:52) at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:117) at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:206) at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55) at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:191) at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49) at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90) at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:764) at org.hibernate.internal.SessionImpl.save(SessionImpl.java:756) at org.hibernate.internal.SessionImpl.save(SessionImpl.java:752) at training.dao.PatientDaoImpl.savePatient(PatientDaoImpl.java:40) 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:606) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) at com.sun.proxy.$Proxy20.savePatient(Unknown Source) at training.service.PatientServiceImpl.addPatient(PatientServiceImpl.java:29) at training.ws.PatientWS.addPatients(PatientWS.java:110) 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:606) at org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:180) at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:96)

Answer 1

hibernate中没有guid策略，但有uuid。以下应该有效。

@GenericGenerator(name = "guidGenerator", strategy = "uuid2")

@generatedvalue不工作，仍然要求手动分配id

1 个答案: