十万火急啊！struts+hibernate实现多对多的插入

Question

本帖最后由 oXiBoLiYaLang1234 于 2012-09-10 15:24:58 编辑

Answer 1

这个是爆的异常：org.hibernate.PropertyAccessException: exception getting property value with CGL
IB (set hibernate.cglib.use_reflection_optimizer=false for more info) getter of 
bean.PaperChoiceId.?
at org.hibernate.tuple.PojoComponentTuplizer.getPropertyValues(PojoComponentTup
lizer.java:89)
at org.hibernate.type.ComponentType.getPropertyValues(ComponentType.java:307)
at org.hibernate.type.ComponentType.getHashCode(ComponentType.java:158)
at org.hibernate.engine.EntityKey.generateHashCode(EntityKey.java:103)
at org.hibernate.engine.EntityKey.<init>(EntityKey.java:47)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventList
ener.java:76)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:862)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:799)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:792)
at daoImpl.PaperDaoImpl.addPaperChoice(PaperDaoImpl.java:218)
at serviceImpl.PaperServiceImpl.addPaperChoice(PaperServiceImpl.java:51)
at action.PaperAction.addPaperChoice(PaperAction.java:107)
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(DefaultActionIn
vocation.java:441)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActi
onInvocation.java:280)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:243)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(D
efaultWorkflowInterceptor.java:165)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(Method
FilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(Validati
onInterceptor.java:252)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.do
Intercept(AnnotationValidationInterceptor.java:68)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(Method
FilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(Con
versionErrorInterceptor.java:122)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(Parame
tersInterceptor.java:195)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(Method
FilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(Parame
tersInterceptor.java:195)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(Method
FilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(St
aticParametersInterceptor.java:179)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectI
nterceptor.java:75)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterce
ptor.java:94)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInt
erceptor.java:235)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDr
ivenInterceptor.java:89)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(S
copedModelDrivenInterceptor.java:130)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(Debu
ggingInterceptor.java:267)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingIn
terceptor.java:126)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareIn
terceptor.java:138)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(Method
FilterInterceptor.java:87)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nIntercepto
r.java:165)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletCon
figInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasIntercep
tor.java:179)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(Ex
ceptionMappingInterceptor.java:176)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocati
on.java:237)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOper
ations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilt
er(StrutsPrepareAndExecuteFilter.java:91)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va: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:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:
877)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(H
ttp11AprProtocol.java:594)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to bea
n.PaperChoiceId
at bean.PaperChoiceId$$BulkBeanByCGLIB$$d99a8e84.getPropertyValues(<generated>)
at net.sf.cglib.beans.BulkBean.getPropertyValues(BulkBean.java:48)
at org.hibernate.tuple.PojoComponentTuplizer.getPropertyValues(PojoComponentTup
lizer.java:86)
... 76 more

Answer 2

JSP提交的时候把ID一起弄到一个数组了，这是第一个问题！然后就是字符串和数据库字段不匹配 这是第二个问题，还有问题还在想！！！求解决啊~~~大牛牛们呢？

Answer 3

按照你上面的信息来看，你是否想做paper和choice对象的多对多映射关联，hibernate一般针对多对多都是拆解成一对多的关系进行关联映射，也就是说这里边有一个中间表paperchoice；即paper与paperchoice是一对多的关系，这个choice对paperchoice也是一个多对多的关系;由于写下来篇幅太多，这里有一个和你情况差不多的案例，也许对你有一些帮助。http://lavasoft.blog.51cto.com/62575/39344