Hibernate下一个类同时与两个类单向多对一无法保存实体?报错
用户、贴吧、帖子三个类
帖子和用户单向多对一
帖子和贴吧单向多对一
保存帖子时报错：
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error that prevented it from fulfilling this request.
exception
java.lang.reflect.InvocationTargetException 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:236) 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:236) 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:511) org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:152) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
root cause
java.lang.AbstractMethodError: org.apache.commons.dbcp.DelegatingPreparedStatement.setCharacterStream(ILjava/io/Reader;J)V 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) org.hibernate.engine.jdbc.internal.proxy.AbstractStatementProxyHandler.continueInvocation(AbstractStatementProxyHandler.java:122) org.hibernate.engine.jdbc.internal.proxy.AbstractProxyHandler.invoke(AbstractProxyHandler.java:81) com.sun.proxy.$Proxy38.setCharacterStream(Unknown Source) org.hibernate.type.descriptor.sql.ClobTypeDescriptor$3$1.doBind(ClobTypeDescriptor.java:83) org.hibernate.type.descriptor.sql.BasicBinder.bind(BasicBinder.java:92) org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:280) org.hibernate.type.AbstractStandardBasicType.nullSafeSet(AbstractStandardBasicType.java:275) org.hibernate.type.AbstractSingleColumnStandardBasicType.nullSafeSet(AbstractSingleColumnStandardBasicType.java:57) org.hibernate.persister.entity.AbstractEntityPersister.dehydrate(AbstractEntityPersister.java:2747) org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3025) org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3469) org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:88) org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362) org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:354) org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:275) org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:326) org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52) org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1213) org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:402) org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101) org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175) org.springframework.orm.hibernate4.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:468) org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:755) org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:724) org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:387) org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120) org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631) com.lxl.action.AddPostAction$$EnhancerByCGLIB$$603a681b.execute(<generated>) 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:236) 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:236) 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:511) org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:152) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.53 logs.
Apache Tomcat/7.0.53
以下是源代码，为了避免太长，将构造方法等没用的东西删掉了：
/**
* 帖子
*/
@Entity
@Table(name = "posts")
public class Post {
private User postUser; // 帖子作者
private Tieba postTieba; // 帖子所在贴吧
/**
* 获得帖子作者
*
* @return 帖子作者
*/
@ManyToOne(cascade = {CascadeType.REFRESH,CascadeType.MERGE,CascadeType.PERSIST}, fetch = FetchType.EAGER // 只要是@xxxOne默认fetchType是eager
, optional = false // 代表这个对象是不是可有可无的
)
@JoinColumn(name = "user_name")
// 指定外键的名称
public User getPostUser() {
return postUser;
}
/**
* 设置帖子作者
*
* @param postUser
* 帖子作者
*/
public void setPostUser(User postUser) {
this.postUser = postUser;
}
/**
* 获得帖子所在贴吧
*
* @return 帖子所在贴吧
*/
@ManyToOne(cascade = {CascadeType.REFRESH,CascadeType.MERGE,CascadeType.PERSIST}, fetch = FetchType.EAGER // 只要是@xxxOne默认fetchType是eager
, optional = false // 代表这个对象是不是可有可无的
)
@JoinColumn(name = "tieba_name")
// 指定外键的名称
public Tieba getPostTieba() {
return postTieba;
}
/**
* 设置帖子所在贴吧
*
* @param postTieba
* 帖子所在贴吧
*/
public void setPostTieba(Tieba postTieba) {
this.postTieba = postTieba;
}
}
/**
* 用户
*/
@Entity
@Table(name = "users")
public class User {
private Set<Tieba> favourateTiebas = new HashSet<Tieba>(); // 用户喜欢的贴吧
/**
* 获得该用户关注的贴吧
*
* @return 该用户关注的贴吧
*/
@ManyToMany(cascade = {CascadeType.REFRESH,CascadeType.MERGE})
@JoinTable(name = "user_tieba", inverseJoinColumns = @JoinColumn(name = "tieba_name") // 可以理解为“跟被维护端的外键的定义”
, joinColumns = @JoinColumn(name = "user_name"))
// 注意这个name是没有提示的
public Set<Tieba> getFavourateTiebas() {
return favourateTiebas;
}
/**
* 设置该用户关注的贴吧
*
* @param favourateTiebas
* 该用户关注的贴吧
*/
public void setFavourateTiebas(Set<Tieba> favourateTiebas) {
this.favourateTiebas = favourateTiebas;
}
}
/**
* 贴吧
*/
@Entity
@Table(name = "tiebas")
public class Tieba {
private Set<User> thisTiebasUsers = new HashSet<User>(); // 本贴吧的用户
/**
* 获得该贴吧所有用户
*
* @return 该贴吧所有用户
*/
@ManyToMany(cascade = {CascadeType.REFRESH,CascadeType.MERGE} // 笔记：级联删除基本用不到
, mappedBy = "favourateTiebas")
public Set<User> getThisTiebasUsers() {
return thisTiebasUsers;
}
/**
* 设置该贴吧所有用户
*
* @param thisTiebasUsers
* 该贴吧所有用户
*/
public void setThisTiebasUsers(Set<User> thisTiebasUsers) {
this.thisTiebasUsers = thisTiebasUsers;
}
}
/**
* 帖子_添加帖子Action
*/
@Controller
@Transactional
public class AddPostAction {
@Resource
PostService postService;// 注入帖子Service
@Resource
UserService userService;// 注入用户Service
@Resource
TiebaService tiebaService;// 注入贴吧Service
private String userName;//用户名
private String tiebaName;//贴吧名
private String postTitle;//帖子标题
private String postContent;//帖子内容
/**
* 调用本Action时执行本方法
*
* @return 用于Action判断跳转方向的字符串
*/
public String execute() {
User user=userService.find(userName);
Tieba tieba=tiebaService.find(tiebaName);
Post post=new Post(postTitle, postContent, user, tieba);
postService.add(post);
return "success";
}
}
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https://developer.aliyun.com/profile/5yerqm5bn5yqg?spm=a2c6h.12873639.0.0.6eae304abcjaIB可能是数据库驱动的问题，换个驱动版本试试<divclass='ref'>
引用来自“JeffreyLin”的评论
可能是数据库驱动的问题，换个驱动版本试试<divclass='ref'>引用来自“JeffreyLin”的评论
可能是数据库驱动的问题，换个驱动版本试试<divclass='ref'>引用来自“JeffreyLin”的评论
可能是数据库驱动的问题，换个驱动版本试试2020-06-14 17:20:37赞同 展开评论 打赏
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