Hibernate. Propertyaccessexception:null value is assigned to a property of primitive type

Log:

[Warn-2016/07/26/18/:45/:52] Processengineserviceimpl. (257)-Approval process log log--submitprocess method: Author userid:3333333349,taskid:245959,procinstid:null,wfinstaceid:16583386853, Current time: Tue Jul 18:45:52 CST 2016[error-2016/07/26/18/:45/:52]projectrepaycontroller. (129)-Approval process Error! Null value is assigned to a property of primitive type setter of com.boa.workflow.model.domain.WfFlowLinkInst.nextSort; Nested exception is Org.hibernate.PropertyAccessException:Null value were assigned to a property of primitive type setter Of Com.boa.workflow.model.domain.WfFlowLinkInst.nextSortorg.springframework.orm.hibernate3.HibernateSystemException  : Null value is assigned to a property of primitive type setter of com.boa.workflow.model.domain.WfFlowLinkInst.nextSort;  Nested exception is Org.hibernate.PropertyAccessException:Null value were assigned to a property of primitive type setter of Com.boa.workflow.model.domain.WfFlowLinkInst.nextSort at Org.springframework.orm.hibernate3.SessionFactoryUtil S.converthiberNateaccessexception (sessionfactoryutils.java:690) at Org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible (Hibernatejpadialect.java : 106) at Org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible ( abstractentitymanagerfactorybean.java:403) at Org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible ( CHAINEDPERSISTENCEEXCEPTIONTRANSLATOR.JAVA:58) at Org.springframework.dao.support.DataAccessUtils.translateIfNecessary (dataaccessutils.java:213) at Org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke ( persistenceexceptiontranslationinterceptor.java:163) at Org.springframework.aop.framework.ReflectiveMethodInvocation.proceed (reflectivemethodinvocation.java:172) at org.springframework.data.jpa.repository.support.lockmoderepositorypostprocessor$ Lockmodepopulatingmethodintercceptor.invoke (Lockmoderepositorypostprocessor.java:105) at Org.springframework.aop.framework.ReflectiveMethodInvocation.proceed ( reflectivemethodinvocation.java:172) at Org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke ( exposeinvocationinterceptor.java:91) at Org.springframework.aop.framework.ReflectiveMethodInvocation.proceed ( reflectivemethodinvocation.java:172) at Org.springframework.aop.framework.JdkDynamicAopProxy.invoke ( jdkdynamicaopproxy.java:204) at Com.sun.proxy. $Proxy 3630.findByWfInstanceIdAndUserid (Unknown Source) at COM. Boa.workflow.manager.impl.WfCommentManagerImpl.flowRuntimeToComment (wfcommentmanagerimpl.java:82) at Com.boa.workflow.manager.impl.WfCommentManagerImpl.insertComment (wfcommentmanagerimpl.java:52) at Com.boa.workflow.service.ProcessEngineServiceImpl.submitProcess (processengineserviceimpl.java:277) at Com.boa.workflow.service.ProcessEngineServiceImpl.completeTask (processengineserviceimpl.java:223) at Com.boa.workfLow.service.ProcessEngineServiceImpl.dealWf (processengineserviceimpl.java:106) at com.boa.workflow.service.processengineserviceimpl$ $FastClassByCGLIB $$3de96632.invoke (<generated>) at Org.springframework.cglib.proxy.MethodProxy.invoke (methodproxy.java:204) at Org.springframework.aop.framework.cglibaopproxy$dynamicadvisedinterceptor.intercept (CglibAopProxy.java:627) at com.boa.workflow.service.processengineserviceimpl$ $EnhancerByCGLIB $ $eff 4E582.DEALWF (<generated>) at Com.boa.workflow.service.ProcessProxyServiceImpl.approvalWorkFlow (processproxyserviceimpl.java:117) at com.boa.workflow.service.processproxyserviceimpl$ $FastClassByCGLIB $ $dc 3563e8.invoke (<generated>) at Org.springframework.cglib.proxy.MethodProxy.invoke (methodproxy.java:204) at        Org.springframework.aop.framework.cglibaopproxy$cglibmethodinvocation.invokejoinpoint (CglibAopProxy.java:698) At Org.springframework.aop.framework.ReflectiveMethodInvocatIon.proceed (reflectivemethodinvocation.java:150) at Org.springframework.transaction.interceptor.transactioninterceptor$1.proceedwithinvocation ( transactioninterceptor.java:96) at Org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction ( transactionaspectsupport.java:260) at Org.springframework.transaction.interceptor.TransactionInterceptor.invoke ( transactioninterceptor.java:94) at Org.springframework.aop.framework.ReflectiveMethodInvocation.proceed ( reflectivemethodinvocation.java:172) at org.springframework.aop.framework.cglibaopproxy$ Dynamicadvisedinterceptor.intercept (cglibaopproxy.java:631) at com.boa.workflow.service.processproxyserviceimpl$ $EnhancerByCGLIB $ $d 84bd278.approvalworkflow (<generated>) at Com.boa.weixin.controller.costmanager.expenses.ProjectRepayController.approvalProjectRepayApply ( projectrepaycontroller.java:122) at Sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)        At Sun.reflect.NativeMethodAccessorImpl.invoke (nativemethodaccessorimpl.java:57) at Sun.reflect.DelegatingM Ethodaccessorimpl.invoke (delegatingmethodaccessorimpl.java:43) at Java.lang.reflect.Method.invoke (Method.java : 606) caused by:org.hibernate.PropertyAccessException:Null value is assigned to a property of primitive type sett Er of com.boa.workflow.model.domain.WfFlowLinkInst.nextSort at Org.hibernate.property.directpropertyaccessor$direc Tsetter.set (directpropertyaccessor.java:143) at Org.hibernate.tuple.entity.AbstractEntityTuplizer.setPropertyValues (abstractentitytuplizer.java:710) at Org.hibernate.tuple.entity.PojoEntityTuplizer.setPropertyValues (pojoentitytuplizer.java:379) at Org.hibernate.persister.entity.AbstractEntityPersister.setPropertyValues (abstractentitypersister.java:4509) at Org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity (twophaseload.java:186) at Org.hibernate.engine.internal.TwoPhasEload.initializeentity (twophaseload.java:137) at Org.hibernate.loader.Loader.initializeEntitiesAndCollections ( loader.java:1108) at Org.hibernate.loader.Loader.processResultSet (loader.java:964) at ORG.HIBERNATE.LOADER.L Oader.doquery (loader.java:911) at Org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections (Loader.java : 342) at Org.hibernate.loader.Loader.doList (loader.java:2526) at Org.hibernate.loader.Loader.doList (LOADER.J ava:2512) at Org.hibernate.loader.Loader.listIgnoreQueryCache (loader.java:2342) at Org.hibernate.loader.Load Er.list (loader.java:2337) at Org.hibernate.loader.custom.CustomLoader.list (customloader.java:338) at Org.hib Ernate.internal.SessionImpl.listCustomQuery (sessionimpl.java:1827) at Org.hibernate.internal.AbstractSessionImpl.list (abstractsessionimpl.java:231) at Org.hibernate.internal.SQLQueryImpl.list (sqlqueryimpl.java:157) at Org.hibernate.ejb.QueryImpl.getSingleResult (queryimpl.java:287) ... More

Analysis Code:
Entity class:

@Entity
@Table "table_name")
Auditauto {

   @Column "Next_sort")
   Nextsort;

   Getter setter .....  

}
database This property corresponds to the field:Next_sort tinyint (4) NULL Next approval node ordinal


Reason:        The database field is an integer, and the corresponding field in the entity class is int, and hibernate cannot map it to the base type int if the value in the database to which it is queried is null.
Workaround:    sets the data type of the entity class to the wrapper class of the base type. Integer, try to avoid using the base type for entity class attributes!!!! Wrapper classes can solve some null pointer problems.

   @Column "Next_sort")  

       Nextsort;

From for notes (Wiz)

Hibernate. Propertyaccessexception:null value is assigned to a property of primitive type