Question

当我尝试使用@lob String保持实体时出错。我记得部分代码运行良好，我根本不记得改变它。我很迷惑。以下是我对错误的看法：

ERROR 30 04 12 23:50:31 [org.hibernate.util.JDBCExceptionReporter] =＆gt; 起始位置[1]不能超过整体CLOB长度[0] com.vaadin.event.ListenerMethod $ MethodException原因： javax.persistence.PersistenceException： org.hibernate.exception.GenericJDBCException：无法插入： [life.domain_model.Post] at com.vaadin.event.ListenerMethod.receiveEvent（ListenerMethod.java:507）在com.vaadin.event.EventRouter.fireEvent（EventRouter.java:161）at com.vaadin.ui.AbstractComponent.fireEvent（AbstractComponent.java:1154）在com.vaadin.ui.Button.fireClick（Button.java:371）at com.vaadin.ui.Button.changeVariables（Button.java:193）at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables（AbstractCommunicationManager.java:1094）在 com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest（AbstractCommunicationManager.java:590）在 com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest（CommunicationManager.java:266）在 com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service（AbstractApplicationServlet.java:476）在 org.vaadin.navigator7.NavigableApplicationServlet.service（NavigableApplicationServlet.java:46）在javax.servlet.http.HttpServlet.service（HttpServlet.java:717）at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:290）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在 org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:233）在 org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:191）在 org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:127）在 org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:102）在 org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:109）在 org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:298）在 org.apache.coyote.http11.Http11Processor.process（Http11Processor.java:859）在 org.apache.coyote.http11.Http11Protocol $ Http11ConnectionHandler.process（Http11Protocol.java:588）在 org.apache.tomcat.util.net.JIoEndpoint $ Worker.run（JIoEndpoint.java:489）在java.lang.Thread.run（未知来源）引起： javax.persistence.PersistenceException： org.hibernate.exception.GenericJDBCException：无法插入： [life.domain_model.Post] at org.hibernate.ejb.AbstractEntityManagerImpl.convert（AbstractEntityManagerImpl.java:1214）在 org.hibernate.ejb.AbstractEntityManagerImpl.convert（AbstractEntityManagerImpl.java:1147）在 org.hibernate.ejb.AbstractEntityManagerImpl.convert（AbstractEntityManagerImpl.java:1153）在 org.hibernate.ejb.AbstractEntityManagerImpl.merge（AbstractEntityManagerImpl.java:695） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（未知来源）at sun.reflect.DelegatingMethodAccessorImpl.invoke（未知来源）at java.lang.reflect.Method.invoke（未知来源）at org.springframework.orm.jpa.SharedEntityManagerCreator $ SharedEntityManagerInvocationHandler.invoke（SharedEntityManagerCreator.java:240）在$ Proxy29.merge（未知来源）at life.dao.ForumDao.merge（ForumDao.java:24）at life.dao.ForumDao $$ FastClassByCGLIB $$ 6eb7cb5f.invoke（）at net.sf.cglib.proxy.MethodProxy.invoke（MethodProxy.java:149）at at org.springframework.aop.framework.Cglib2AopProxy $ CglibMethodInvocation.invokeJoinpoint（Cglib2AopProxy.java:688）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:150）在 org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:110）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:172）在 org.springframework.aop.framework.Cglib2AopProxy $ DynamicAdvisedInterceptor.intercept（Cglib2AopProxy.java:621） at life.dao.ForumDao $$ EnhancerByCGLIB $$ 8ecdd1fd.merge（）在life.dao.ForumDaoImpl.mergeDiscussion（ForumDaoImpl.java:29）at at life.dao.ForumDaoImpl.saveNewPostForDiscussion（ForumDaoImpl.java:50）在 life.dao.ForumDaoImpl $$ FastClassByCGLIB $$ 6d37da1f.invoke（）在net.sf.cglib.proxy.MethodProxy.invoke（MethodProxy.java:149）at org.springframework.aop.framework.Cglib2AopProxy $ CglibMethodInvocation.invokeJoinpoint（Cglib2AopProxy.java:688）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:150）在 org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:110）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:172）在 org.springframework.aop.framework.Cglib2AopProxy $ DynamicAdvisedInterceptor.intercept（Cglib2AopProxy.java:621）在 life.dao.ForumDaoImpl $$ EnhancerByCGLIB $$ 66b0b0bd.saveNewPostForDiscussion（）在 life.ui.layouts.ForumEditorLayout.replyToDiscussion（ForumEditorLayout.java:112）在 life.ui.layouts.ForumEditorLayout $ 3.buttonClick（ForumEditorLayout.java:84） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（未知来源）at sun.reflect.DelegatingMethodAccessorImpl.invoke（未知来源）at java.lang.reflect.Method.invoke（未知来源）at com.vaadin.event.ListenerMethod.receiveEvent（ListenerMethod.java:487） ... 22更多引起：org.hibernate.exception.GenericJDBCException：无法插入：[life.domain_model.Post] at org.hibernate.exception.SQLStateConverter.handledNonSpecificException（SQLStateConverter.java:140）在 org.hibernate.exception.SQLStateConverter.convert（SQLStateConverter.java:128）在 org.hibernate.exception.JDBCExceptionHelper.convert（JDBCExceptionHelper.java:66）在 org.hibernate.id.insert.AbstractReturningDelegate.performInsert（AbstractReturningDelegate.java:64）在 org.hibernate.persister.entity.AbstractEntityPersister.insert（AbstractEntityPersister.java:2327）在 org.hibernate.persister.entity.AbstractEntityPersister.insert（AbstractEntityPersister.java:2834）在 org.hibernate.action.EntityIdentityInsertAction.execute（EntityIdentityInsertAction.java:71）在org.hibernate.engine.ActionQueue.execute（ActionQueue.java:273）at at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate（AbstractSaveEventListener.java:320）在 org.hibernate.event.def.AbstractSaveEventListener.performSave（AbstractSaveEventListener.java:203）在 org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId（AbstractSaveEventListener.java:129）在 org.hibernate.ejb.event.EJB3MergeEventListener.saveWithGeneratedId（EJB3MergeEventListener.java:62）在 org.hibernate.event.def.DefaultMergeEventListener.saveTransientEntity（DefaultMergeEventListener.java:415）在 org.hibernate.event.def.DefaultMergeEventListener.mergeTransientEntity（DefaultMergeEventListener.java:341）在 org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient（DefaultMergeEventListener.java:303）在 org.hibernate.event.def.DefaultMergeEventListener.onMerge（DefaultMergeEventListener.java:258）在org.hibernate.impl.SessionImpl.fireMerge（SessionImpl.java:877）at at org.hibernate.impl.SessionImpl.merge（SessionImpl.java:859）at org.hibernate.engine.CascadingAction $ 6.cascade（CascadingAction.java:279）在org.hibernate.engine.Cascade.cascadeToOne（Cascade.java:392）at org.hibernate.engine.Cascade.cascadeAssociation（Cascade.java:335）at at org.hibernate.engine.Cascade.cascadeProperty（Cascade.java:204）at at org.hibernate.engine.Cascade.cascadeCollectionElements（Cascade.java:425）在org.hibernate.engine.Cascade.cascadeCollection（Cascade.java:362）在org.hibernate.engine.Cascade.cascadeAssociation（Cascade.java:338）在org.hibernate.engine.Cascade.cascadeProperty（Cascade.java:204）at org.hibernate.engine.Cascade.cascade（Cascade.java:161）at org.hibernate.event.def.DefaultMergeEventListener.cascadeOnMerge（DefaultMergeEventListener.java:630）在 org.hibernate.event.def.DefaultMergeEventListener.entityIsDetached（DefaultMergeEventListener.java:490）在 org.hibernate.event.def.DefaultMergeEventListener.onMerge（DefaultMergeEventListener.java:255）在 org.hibernate.event.def.DefaultMergeEventListener.onMerge（DefaultMergeEventListener.java:84）在org.hibernate.impl.SessionImpl.fireMerge（SessionImpl.java:867）at org.hibernate.impl.SessionImpl.merge（SessionImpl.java:851）at org.hibernate.impl.SessionImpl.merge（SessionImpl.java:855）at org.hibernate.ejb.AbstractEntityManagerImpl.merge（AbstractEntityManagerImpl.java:686） ... 54更多引起：java.sql.SQLException：起始位置[1] 不能超过整体CLOB长度[0] at org.hibernate.engine.jdbc.ClobProxy.invoke(ClobProxy.java:146）at at $ Proxy36.getSubString（未知来源）at com.mysql.jdbc.PreparedStatement.setClob（PreparedStatement.java:3553）在 org.apache.commons.dbcp.DelegatingPreparedStatement.setClob（DelegatingPreparedStatement.java:187）在 org.apache.commons.dbcp.DelegatingPreparedStatement.setClob（DelegatingPreparedStatement.java:187）在 org.hibernate.type.descriptor.sql.ClobTypeDescriptor $ 1.doBind（ClobTypeDescriptor.java:60）在 org.hibernate.type.descriptor.sql.BasicBinder.bind（BasicBinder.java:89）在 org.hibernate.type.AbstractStandardBasicType.nullSafeSet（AbstractStandardBasicType.java:282）在 org.hibernate.type.AbstractStandardBasicType.nullSafeSet（AbstractStandardBasicType.java:277）在 org.hibernate.type.AbstractSingleColumnStandardBasicType.nullSafeSet（AbstractSingleColumnStandardBasicType.java:85）在 org.hibernate.persister.entity.AbstractEntityPersister.dehydrate（AbstractEntityPersister.java:2166）在 org.hibernate.persister.entity.AbstractEntityPersister.dehydrate（AbstractEntityPersister.java:2143）在 org.hibernate.persister.entity.AbstractEntityPersister $ 4.bindValues（AbstractEntityPersister.java:2321）在 org.hibernate.id.insert.AbstractReturningDelegate.performInsert（AbstractReturningDelegate.java:56） ... 85更多

这是Post实体：

@Entity
public class Post {
    @Id @GeneratedValue
    private Long id;
    @ManyToOne @JoinColumn(name = "owner_id")
    private User owner;
    @ManyToOne @JoinColumn(name = "editer_id")
    private User lastEditer;
    private Date creationDate;
    private Date lastEditionDate;
    @Lob
    private String content;
    @ManyToOne @JoinColumn(name = "discussion_id")
    private Discussion discussion;

    public Post(){

    }
    public Post(User owner,String content){
        this.owner = owner;
        this.lastEditer = null;
        Date curent = new Date();
        this.creationDate = curent;
        this.lastEditionDate = curent;
        this.content = content;
        this.discussion = null;
    }


    //G&S
....

无论String内容长度如何，我都会收到错误。我还在使用hibernate 3.6.0和MySql 5.5（+ spring）。有谁能告诉我如何纠正这个问题？

Answer 1

在尝试将空字符串保存到使用@Lob注释的字段时遇到了同样的问题。发现此错误：https://hibernate.onjira.com/browse/HHH-5704

我的项目隐含地包含了Hibernate核心版本3.6.0，一旦我更新了POM以明确包含核心版本3.6.10，它就开始按预期工作了。

票证很好地解释了问题。

Hibernate @Lob注释不再工作：用几个字符串不能超过整体CLOB长度？

1 个答案: