mysql Java Hibernate异常：无法反序列化
刚刚在这里冬眠。我正在尝试从MYSQL数据库中检索对象列表，其中一列是BLOB
项目。爪哇
public class Item implements Serializable{
private static final long serialVersionUID = -7040387542178744607L;
private int id;
private String name;
private User owner;
private int rating;
private String review;
private byte[] coverImage; //getters, setters, etc.
}
伊梅达奥。爪哇
public List<Item> getAllItems() {
Session s = sessionFactory.getCurrentSession();
Query q = s.createQuery("from Item");
List<Item> items = new ArrayList<Item>();
items = q.list();
return items;
}
项目。哈佛商学院。xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="myApp.Item" table="ITEM" >
<id name="id" column="ITEM_ID" >
<generator class="native" />
</id>
<many-to-one name="owner" class="myApp.User"
column="OWNER_ID" unique="true" not-null="true"
cascade="all" />
<property name="name" column="NAME" ></property>
<property name="rating" column="RATING" ></property>
<property name="review" column="REVIEW" ></property>
<property name="coverImage" column="COVER_IMAGE"></property>
</subclass>
</class>
</hibernate-mapping>
堆栈跟踪：
exception
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.hibernate.type.SerializationException: could not deserialize
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
org.hibernate.type.SerializationException: could not deserialize
org.hibernate.internal.util.SerializationHelper.doDeserialize(SerializationHelper.java:262)
org.hibernate.internal.util.SerializationHelper.deserialize(SerializationHelper.java:306)
org.hibernate.type.descriptor.java.SerializableTypeDescriptor.fromBytes(SerializableTypeDescriptor.java:131)
org.hibernate.type.descriptor.java.SerializableTypeDescriptor.wrap(SerializableTypeDescriptor.java:117)
org.hibernate.type.descriptor.java.SerializableTypeDescriptor.wrap(SerializableTypeDescriptor.java:39)
org.hibernate.type.descriptor.sql.VarbinaryTypeDescriptor$2.doExtract(VarbinaryTypeDescriptor.java:67)
org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:65)
org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:269)
org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:265)
org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:238)
org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:357)
org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2705)
org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1544)
org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1476)
org.hibernate.loader.Loader.getRow(Loader.java:1376)
org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:643)
org.hibernate.loader.Loader.doQuery(Loader.java:853)
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:292)
org.hibernate.loader.Loader.doList(Loader.java:2381)
org.hibernate.loader.Loader.doList(Loader.java:2367)
org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2197)
org.hibernate.loader.Loader.list(Loader.java:2192)
org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:470)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355)
org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195)
org.hibernate.internal.SessionImpl.list(SessionImpl.java:1248)
org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)
ar.edu.uces.progweb2.merlo2.dao.ItemDao.getAllItems(ItemDao.java:42)
ar.edu.uces.progweb2.merlo2.dao.ItemDao$$FastClassByCGLIB$$913d8323.invoke(<generated>)
net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:689)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)
ar.edu.uces.progweb2.merlo2.dao.ItemDao$$EnhancerByCGLIB$$8a257e3c.getAllItems(<generated>)
ar.edu.uces.progweb2.merlo2.controller.persistence.ItemController.list(ItemController.java:58)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause
java.io.EOFException
java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2353)
java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2822)
java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:804)
java.io.ObjectInputStream.<init>(ObjectInputStream.java:301)
org.hibernate.internal.util.SerializationHelper$CustomObjectInputStream.<init>(SerializationHelper.java:328)
org.hibernate.internal.util.SerializationHelper$CustomObjectInputStream.<init>(SerializationHelper.java:318)
org.hibernate.internal.util.SerializationHelper.doDeserialize(SerializationHelper.java:237)
org.hibernate.internal.util.SerializationHelper.deserialize(SerializationHelper.java:306)
org.hibernate.type.descriptor.java.SerializableTypeDescriptor.fromBytes(SerializableTypeDescriptor.java:131)
org.hibernate.type.descriptor.java.SerializableTypeDescriptor.wrap(SerializableTypeDescriptor.java:117)
org.hibernate.type.descriptor.java.SerializableTypeDescriptor.wrap(SerializableTypeDescriptor.java:39)
org.hibernate.type.descriptor.sql.VarbinaryTypeDescriptor$2.doExtract(VarbinaryTypeDescriptor.java:67)
org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:65)
org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:269)
org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:265)
org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:238)
org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:357)
org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2705)
org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1544)
org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1476)
org.hibernate.loader.Loader.getRow(Loader.java:1376)
org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:643)
org.hibernate.loader.Loader.doQuery(Loader.java:853)
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:292)
org.hibernate.loader.Loader.doList(Loader.java:2381)
org.hibernate.loader.Loader.doList(Loader.java:2367)
org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2197)
org.hibernate.loader.Loader.list(Loader.java:2192)
org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:470)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355)
org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195)
org.hibernate.internal.SessionImpl.list(SessionImpl.java:1248)
org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)
ar.edu.uces.progweb2.merlo2.dao.ItemDao.getAllItems(ItemDao.java:42)
ar.edu.uces.progweb2.merlo2.dao.ItemDao$$FastClassByCGLIB$$913d8323.invoke(<generated>)
net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:689)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)
ar.edu.uces.progweb2.merlo2.dao.ItemDao$$EnhancerByCGLIB$$8a257e3c.getAllItems(<generated>)
ar.edu.uces.progweb2.merlo2.controller.persistence.ItemController.list(ItemController.java:58)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
旁注：我知道注释有更多的文档可用，但这是一些遗留代码，我必须简短地维护，升级它不是我的责任。我真的非常感谢你在这方面的帮助。提前谢谢
# 1 楼答案
答案非常简单。我之前映射了一个子类，但最终我不需要它，我忘记了删除结束标记。 哎呀，冬眠异常不是不言自明的吗？感谢Matteo的支持