hibernate update更新报错，请帮忙

Question

org.hibernate.TransientObjectException: The given object has a null identifier: com.cp.domain.UserInfoEntity
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.getUpdateId(DefaultSaveOrUpdateEventListener.java:249)
at org.hibernate.event.def.DefaultUpdateEventListener.getUpdateId(DefaultUpdateEventListener.java:46)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:217)
at org.hibernate.event.def.DefaultUpdateEventListener.performSaveOrUpdate(DefaultUpdateEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireUpdate(SessionImpl.java:564)
at org.hibernate.impl.SessionImpl.update(SessionImpl.java:552)
at org.hibernate.impl.SessionImpl.update(SessionImpl.java:544)
at com.cp.dao.impl.BaseDaoImpl.update(BaseDaoImpl.java:97)
at com.cp.service.login.LoginService.updateUser(LoginService.java:122)
at com.cp.action.login.LoginAction.updateUser(LoginAction.java:218)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:453)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:292)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:255)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:211)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:211)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:90)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:192)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:510)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
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:127)
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:298)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:864)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1665)
at java.lang.Thread.run(Thread.java:619)
UserInfoEntity.hbm.xml
<hibernate-mapping package="com.cp.domain">
<class name="UserInfoEntity" table="cp_userinfo">
<id column="userId" name="userId"  type="integer" unsaved-value="null">
<generator class="identity" />
</id>
 <property column="userName" name="userName" type="string" not-null="true"></property>
 <property column="pwd" name="pwd" type="string"  not-null="true"></property>
 <property column="realName" name="realName" type="string"  not-null="true"></property>
 <property column="depart" name="depart" type="string"  not-null="true"></property>
 <property column="phone" name="phone" type="string"  not-null="true"></property>
 <property column="state" name="state" type="integer"  not-null="true"></property>
 <property column="role" name="role" type="string" not-null="true"></property>
</class>
</hibernate-mapping>action:
UserInfoEntity user = loginService.getAllById(UserInfoEntity.class, userId);// UserInfoEntity userInfoEntity = new UserInfoEntity();
user.setUserId(userId);
user.setUserName(userName);
user.setPwd(pwd);
user.setRealName(realName);
user.setDepart(depart);
user.setPhone(phone);
user.setState(new Integer(0));
user.setRole("未分配");
int flg = loginService.updateUser(userInfo);
if (flg == 1) {
System.out.println("用户id[" + userId + "]修改成功");
return "success";
} else {
return "fail";
}
dao:
public void update (Object obj) {
Session s = null ;
Transaction tx = null ;
try {
s = HibernateUtil.getSession() ;
tx = s.beginTransaction() ;
s.update(obj) ;
tx.commit() ;
} catch (HibernateException ex) {
ex.printStackTrace() ;
throw ex ;
} finally {
if( s != null ) {
s.close() ;
}
}
}

Answer 1

你把userid都重新赋值,当然在数据库中就找不到记录了;
所以就没办法更新了

Answer 2

我不给userid赋值，Hibernate怎么知道更新的是哪条记录啊？

Answer 3

The given object has a null identifier: com.cp.domain.UserInfoEntity
UserInfoEntity里面有一项为null，但是在hbm 和数据库里是 NOT NULL的

Answer 4

我debug了，UserInfoEntity里都是有值的，没有出现null，数据库里也都是有值的

Answer 5

你的hbm是自己写的？怎么记得好像不是这个样子的？你数据库的表有主键么？还是值给设置了一个NOT NULL？

Answer 6

是自己写的啊，数据库的表有主键的，就是userId

Answer 7

可能是你hbm写的不对，你最好让hibernate自动生成，然后把<generator class="identity" /> 改成<generator class="native" />

Answer 8

再说了你的type写的明显不对，开头字母还是小写的？
最好写全称java.lang.String

Answer 9

你把SQL打印出来看看吧……一目了然

Answer 10

更新有问题，sql根本打印不出来啊

Answer 11

可以的呀，hibernate里面有个属性  <prop key="hibernate.show_sql">false</prop> 改成true就行了，没有的话你就加上，    然后把打印出来的SQL直接扔到数据库里面运行试试

Answer 12

这句话有异常，怎么会打印sql？