使用Spring3和Hibernate4进行多文件上传

我对SpringMVC和Hibernate还不熟悉，正在学习

我在尝试将图像上传到站点并存储到MySQL数据库时遇到了这个问题

我有一个项目模型，其中包括一个照片模型列表。在每个照片模型中，都有一个名为photo的字段（commonmultipartfile），用于实际存储照片

ProjectModel.java

public class ProjectModel{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;

    @OneToMany(fetch = FetchType.LAZY, cascade=CascadeType.ALL)
    private List<PhotoModel> photos;
    //getters and setters
}

public class PhotoModel extends AbstractModel implements Serializable{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;

    @Column(columnDefinition = "LONGBLOB")
    private CommonsMultipartFile photo;

    @ManyToOne(fetch = FetchType.LAZY)
    private ProjectModel project;
    //getters and setters
}

addProject.jsp

<form:input type="file" path="photos[0].photo"/>
<form:input type="file" path="photos[1].photo"/>

ProjectController.java

@RequestMapping(value="/project/add", method = {RequestMethod.GET})
public String toAddProject (Model model){
    if (!model.containsAttribute(Constants.COMMAND)){
        ProjectModel project = new ProjectModel();
        project.setPhotos(new AutoPopulatingList<PhotoModel>(PhotoModel.class));
        model.addAttribute(Constants.COMMAND, project);
    }
    return "/user/addProject";
}

@RequestMapping(value="/project/add", method = {RequestMethod.POST})
public String addProject Model model, @ModelAttribute("command") @Valid ProjectModel command, BindingResult result){

    if(result.hasErrors()) {
            model.addAttribute(Constants.COMMAND, command);
            return toAddProject(model);
        }

     projectService.save(command);
     return "redirect:/success";
}

@RequestMapping（value=“/project/add”，method={RequestMethod.GET}）
公共字符串toAddProject（模型）{
如果（！model.containsAttribute（Constants.COMMAND））{
ProjectModel项目=新的ProjectModel（）；
项目。setPhotos（新的AutoPopulatingList（PhotoModel.class））；
model.addAttribute（Constants.COMMAND，project）；
}
返回“/user/addProject”；
}
@RequestMapping（value=“/project/add”，method={RequestMethod.POST}）
公共字符串addProject模型，@ModelAttribute（“命令”）@Valid ProjectModel命令，BindingResult）{
if（result.hasErrors（））{
model.addAttribute（Constants.COMMAND，COMMAND）；
返回到ddproject（model）；
}
projectService.save（命令）；
返回“重定向：/success”；
}

我的问题是，我能够上传某些类型的图像，如jpg或jpeg，但不能上传png。如果我试图上传这样的文件，错误如下

    org.springframework.orm.hibernate4.HibernateSystemException: could not deserialize; nested exception is org.hibernate.type.SerializationException: could not deserialize
    at org.springframework.orm.hibernate4.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:206)
    at org.springframework.orm.hibernate4.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:606)
    at org.springframework.orm.hibernate4.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:488)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    at $Proxy32.save(Unknown Source)
    at cn.javass.demo.web.controller.ProjectController.addProject(ProjectController.java:64)
    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 org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at cn.javass.common.web.filter.BackURLFilter.doFilter(BackURLFilter.java:37)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:680)
Caused by: org.hibernate.type.SerializationException: could not deserialize
    at org.hibernate.internal.util.SerializationHelper.doDeserialize(SerializationHelper.java:250)
    at org.hibernate.internal.util.SerializationHelper.deserialize(SerializationHelper.java:306)
    at org.hibernate.internal.util.SerializationHelper.clone(SerializationHelper.java:95)
    at org.hibernate.type.descriptor.java.SerializableTypeDescriptor$SerializableMutabilityPlan.deepCopyNotNull(SerializableTypeDescriptor.java:55)
    at org.hibernate.type.descriptor.java.SerializableTypeDescriptor$SerializableMutabilityPlan.deepCopyNotNull(SerializableTypeDescriptor.java:42)
    at org.hibernate.type.descriptor.java.MutableMutabilityPlan.deepCopy(MutableMutabilityPlan.java:57)
    at org.hibernate.type.AbstractStandardBasicType.deepCopy(AbstractStandardBasicType.java:340)
    at org.hibernate.type.AbstractStandardBasicType.deepCopy(AbstractStandardBasicType.java:336)
    at org.hibernate.type.TypeHelper.deepCopy(TypeHelper.java:67)
    at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:135)
    at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362)
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:354)
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:276)
    at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:326)
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52)
    at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1127)
    at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:325)
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175)
    at org.springframework.orm.hibernate4.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:480)
    ... 53 more
Caused by: java.io.FileNotFoundException: /Users/Paddy/Documents/apache-tomcat-7.0.25/work/Catalina/localhost/Spring3Hibernate4Chinese/upload_1bc5d431_136acd506da__8000_00000013.tmp (No such file or directory)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(FileInputStream.java:120)
    at org.apache.commons.fileupload.disk.DiskFileItem.readObject(DiskFileItem.java:709)
    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 java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:969)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1848)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1946)
    at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1870)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1752)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
    at org.hibernate.internal.util.SerializationHelper.doDeserialize(SerializationHelper.java:244)
    ... 72 more

org.springframework.orm.hibernate4.HibernateSystemException:无法反序列化；嵌套异常为org.hibernate.type.SerializationException:无法反序列化
位于org.springframework.orm.hibernate4.SessionFactoryUtils.convertHibernateAccessException（SessionFactoryUtils.java:206）
位于org.springframework.orm.hibernate4.HibernateTransactionManager.convertHibernateAccessException（HibernateTransactionManager.java:606）
位于org.springframework.orm.hibernate4.HibernateTransactionManager.doCommit（HibernateTransactionManager.java:488）
位于org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit（AbstractPlatformTransactionManager.java:754）
位于org.springframework.transaction.support.AbstractPlatformTransactionManager.commit（AbstractPlatformTransactionManager.java:723）
位于org.springframework.transaction.interceptor.TransactionSpectSupport.commitTransactionAfterReturning（TransactionSpectSupport.java:393）
位于org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:120）
位于org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:172）
位于org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke（ExposeInvocationInterceptor.java:90）
位于org.springframework.aop.framework.ReflectiveMethodInvocation.procedue（ReflectiveMethodInvocation.java:172）
位于org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java:202）
位于$Proxy32.save（未知来源）
在cn.javass.demo.web.controller.ProjectController.addProject（ProjectController.java:64）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）中
位于java.lang.reflect.Method.invoke（Method.java:597）
位于org.springframework.web.method.support.InvocableHandlerMethod.invoke（InvocableHandlerMethod.java:213）
位于org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod.java:126）
位于org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:96）
位于org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod（RequestMappingHandlerAdapter.java:617）
位于org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:578）
位于org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:80）
位于org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:923）
位于org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:852）
位于org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:882）
位于org.springframework.web.servlet.FrameworkServlet.doPost（FrameworkServlet.java:789）
位于javax.servlet.http.HttpServlet.service（HttpServlet.java:641）
位于javax.servlet.http.HttpServlet.service（HttpServlet.java:722）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:305）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）
位于org.springframework.web.filter.hiddenhttmpmethodfilter.doFilterInternal（hiddenhttmpmethodfilter.java:77）
位于org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:76）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）
在cn.javass.common.web.filter.BackURLFilter.doFilter（BackURLFilter.java:37）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）
位于org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter.java:88）
位于org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:76）
位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）
位于org.apache.catalina.core.ApplicationFilterChain.doFilter(