我使用 jax-ws、glassfish 和 hibernate 开发了一个网络服务。 我有一个实体:
@Entity
public class CertificateRequest {
@Id
@Column(unique=true, nullable = false)
@GeneratedValue
private Long ID;
@Column(nullable = false)
private Long terminalID;
@Column(nullable = false)
private boolean approved;
@Column(nullable = false)
private byte[] rawCertificateRequest;
@Column(nullable = false)
private String openTerminalKey;
@Column(nullable = false)
private Date requestDate;
public Long getID() {
return ID;
}
protected CertificateRequest(){
this.requestDate = new Date();
}
public CertificateRequest(long UID, long terminalID, PKCS10 rawCertificateRequest, String openTerminalKey){
this.ID = UID;
this.terminalID = terminalID;
this.rawCertificateRequest = PKCS10toChar(rawCertificateRequest);
this.openTerminalKey = openTerminalKey;
this.requestDate = new Date();
approved = false;
}
public CertificateRequest(long UID, long terminalID, byte[] rawCertificateRequest, String openTerminalKey){
this.ID = UID;
this.terminalID = terminalID;
this.rawCertificateRequest = rawCertificateRequest;
this.openTerminalKey = openTerminalKey;
this.requestDate = new Date();
approved = false;
}
public Long getTerminalID() {
return terminalID;
}
public void setTerminalID(long terminalID) {
this.terminalID = terminalID;
}
public Boolean isApproved() {
return approved;
}
public void setApproved(boolean approved) {
this.approved = approved;
}
public PKCS10 getRawCertificateRequest(){
return CharToPKCS10(this.rawCertificateRequest);
}
public void setRawCertificateRequest(PKCS10 rawCertificateRequest) {
this.rawCertificateRequest = PKCS10toChar(rawCertificateRequest);
}
public Date getRequestDate() {
return requestDate;
}
public void setRequestDate(Date requestDate) {
this.requestDate = requestDate;
}
public String getOpenTerminalKey() {
return openTerminalKey;
}
public void setOpenTerminalKey(String openTerminalKey) {
this.openTerminalKey = openTerminalKey;
}
private byte[] PKCS10toChar(PKCS10 rawCertificateRequest){
return rawCertificateRequest.getEncoded();
}
private PKCS10 CharToPKCS10(byte[] rawCharCertificateRequest){
try {
return new PKCS10(rawCharCertificateRequest);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
并使用它:
public static void createCertificateRequest(long UID, long terminalID, byte[] rawCertificateRequest){
CertificateRequest certificateRequest = new CertificateRequest(UID, terminalID, rawCertificateRequest, "tmpString");
EntityManager entityManager = EntityManagerFabric.getEntityManager();
entityManager.getTransaction().begin();
entityManager.persist(certificateRequest);
entityManager.getTransaction().commit();
}
然后我在运行时遇到错误:
org.hibernate.PersistentObjectException: detached entity passed to persist: org.sigmaps.keyer.models.CertificateRequest
javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: org.sigmaps.keyer.models.CertificateRequest
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1763)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1677)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1683)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1187)
at org.sigmaps.keyer.handlers.CertificateHandler.createCertificateRequest(CertificateHandler.java:34)
at org.sigmaps.keyer.CertificateService.requestCertificate(CertificateService.java:20)
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.glassfish.webservices.InstanceResolverImpl$1.invoke(InstanceResolverImpl.java:143)
at com.sun.xml.ws.server.InvokerTube$2.invoke(InvokerTube.java:149)
at com.sun.xml.ws.server.sei.SEIInvokerTube.processRequest(SEIInvokerTube.java:88)
at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:1136)
at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:1050)
at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:1019)
at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:877)
at com.sun.xml.ws.api.pipe.helper.AbstractTubeImpl.process(AbstractTubeImpl.java:136)
at org.glassfish.webservices.MonitoringPipe.process(MonitoringPipe.java:142)
at com.sun.xml.ws.api.pipe.helper.PipeAdapter.processRequest(PipeAdapter.java:119)
at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:1136)
at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:1050)
at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:1019)
at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:877)
at com.sun.xml.ws.api.pipe.helper.AbstractTubeImpl.process(AbstractTubeImpl.java:136)
at com.sun.enterprise.security.webservices.CommonServerSecurityPipe.processRequest(CommonServerSecurityPipe.java:210)
at com.sun.enterprise.security.webservices.CommonServerSecurityPipe.process(CommonServerSecurityPipe.java:142)
at com.sun.xml.ws.api.pipe.helper.PipeAdapter.processRequest(PipeAdapter.java:119)
at com.sun.xml.ws.api.pipe.Fiber.__doRun(Fiber.java:1136)
at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:1050)
at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:1019)
at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:877)
at com.sun.xml.ws.server.WSEndpointImpl$2.process(WSEndpointImpl.java:420)
at com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:687)
at com.sun.xml.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:266)
at com.sun.xml.ws.transport.http.servlet.ServletAdapter.handle(ServletAdapter.java:169)
at org.glassfish.webservices.JAXWSServlet.doPost(JAXWSServlet.java:169)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
at java.lang.Thread.run(Thread.java:724)
Caused by: org.hibernate.PersistentObjectException: detached entity passed to persist: org.sigmaps.keyer.models.CertificateRequest
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:139)
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:75)
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:811)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:784)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:789)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1181)
... 62 more
]]
我不明白为什么这个错误一直在发生。任何人都可以解释这个错误的含义，并提供解决方法的建议吗？
最佳答案
错误的原因是您正在创建的实体实例已经设置了 @Id 字段。具有集合 @Id 字段的实体被持久性提供者视为分离的。不会对数据库进行检查，因此该实体是否已存在于数据库中并不重要。
通常，应用程序不应该定义 DB id。您应该将其留给提供商。
但是，如果您想要使用应用程序生成的 ID，例如 UUID，您可以为您的实体添加一个字段。只是不要用 @Id 注释它。您可以并且可能应该在您的 equals 和 hashCode 方法中使用您的应用程序 ID。
关于java - hibernate 错误 : detached entity passed to persist，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23607087/