有关Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1问题的解法

今天在用ssh是删除一条记录是遇到了Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1的错误；在网上找了一些资料看，最后自己仔细总结了一下

先说我的项目大致情况吧，用的mysql数据库，实体类是用注解配置的

由于问题的报错信息比较长，所以贴在了后面

解决办法：

下面我的实体类的代码，我把@GeneratedValue注释掉之后就不会出现这个问题了。具体是因为mysql里面id已经是设置为自动增长了，而这里又用注解设置，所以导致数据库操作失败了。

我的问题描述如下：
Struts Problem Report
Struts has detected an unhandled exception:
Messages:
Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
File:org/hibernate/jdbc/Expectations.javaLine number:85
Stacktraces
org.hibernate.StaleStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1
    org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:85)    org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:70)    org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:90)    org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70)    org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268)    org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:268)    org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:189)    org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)    org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)    org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)    org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)    org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133)    com.rcpy.dao.impl.NewsDaoImpl.delete(NewsDaoImpl.java:46)    com.rcpy.service.impl.NewsServiceImpl.delete(NewsServiceImpl.java:31)    com.rcpy.action.NewsAction.deleteNews(NewsAction.java:91)    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    java.lang.reflect.Method.invoke(Method.java:606)    com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:453)    com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:292)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:255)    org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)    org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:211)    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:211)    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:90)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:192)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)    org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)    org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:510)    org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)    org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)    org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)    org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)    org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)    org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)    org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)    org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)    java.lang.Thread.run(Thread.java:744)