java - Spring form not populating the data to model object -

my model object has 'ctlgentry' attribute has attribute 'yearpublished'. form has populated following error thrown:

org.hibernate.propertyaccessexception: null value assigned property of primitive type setter of com.csu.library.mvc.dto.catalogueentry.yearpublished] root cause java.lang.illegalargumentexception     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:39)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:25)     @ java.lang.reflect.method.invoke(method.java:597)     @ org.hibernate.property.basicpropertyaccessor$basicsetter.set(basicpropertyaccessor.java:65)     @ org.hibernate.tuple.entity.abstractentitytuplizer.setpropertyvalues(abstractentitytuplizer.java:707)     @ org.hibernate.tuple.entity.pojoentitytuplizer.setpropertyvalues(pojoentitytuplizer.java:371)     @ org.hibernate.persister.entity.abstractentitypersister.setpropertyvalues(abstractentitypersister.java:4463)     @ org.hibernate.event.internal.abstractsaveeventlistener.performsaveorreplicate(abstractsaveeventlistener.java:276)     @ org.hibernate.event.internal.abstractsaveeventlistener.performsave(abstractsaveeventlistener.java:193)     @ org.hibernate.event.internal.abstractsaveeventlistener.savewithgeneratedid(abstractsaveeventlistener.java:126)     @ org.hibernate.event.internal.defaultsaveorupdateeventlistener.savewithgeneratedorrequestedid(defaultsaveorupdateeventlistener.java:204)     @ org.hibernate.event.internal.defaultsaveeventlistener.savewithgeneratedorrequestedid(defaultsaveeventlistener.java:55)     @ org.hibernate.event.internal.defaultsaveorupdateeventlistener.entityistransient(defaultsaveorupdateeventlistener.java:189)     @ org.hibernate.event.internal.defaultsaveeventlistener.performsaveorupdate(defaultsaveeventlistener.java:49)     @ org.hibernate.event.internal.defaultsaveorupdateeventlistener.onsaveorupdate(defaultsaveorupdateeventlistener.java:90)     @ org.hibernate.internal.sessionimpl.firesave(sessionimpl.java:756)     @ org.hibernate.internal.sessionimpl.save(sessionimpl.java:748)     @ org.hibernate.internal.sessionimpl.save(sessionimpl.java:744)     @ com.csu.library.mvc.dao.generic.generichibernatedao.save(generichibernatedao.java:73)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:39)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:25)     @ java.lang.reflect.method.invoke(method.java:597)     @ org.springframework.aop.support.aoputils.invokejoinpointusingreflection(aoputils.java:317)     @ org.springframework.aop.framework.reflectivemethodinvocation.invokejoinpoint(reflectivemethodinvocation.java:183)     @ 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.jdkdynamicaopproxy.invoke(jdkdynamicaopproxy.java:204)     @ com.sun.proxy.$proxy54.save(unknown source)     @ com.csu.library.mvc.service.impl.catalogueentryserviceimpl.additem(catalogueentryserviceimpl.java:22)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:39)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:25)     @ java.lang.reflect.method.invoke(method.java:597)     @ org.springframework.aop.support.aoputils.invokejoinpointusingreflection(aoputils.java:317)     @ org.springframework.aop.framework.reflectivemethodinvocation.invokejoinpoint(reflectivemethodinvocation.java:183)     @ 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.jdkdynamicaopproxy.invoke(jdkdynamicaopproxy.java:204)     @ com.sun.proxy.$proxy55.additem(unknown source)     @ com.csu.library.mvc.controller.catalogueentrycontroller.addcatalogueentry(catalogueentrycontroller.java:42)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:39)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:25)     @ java.lang.reflect.method.invoke(method.java:597)     @ org.springframework.web.method.support.invocablehandlermethod.invoke(invocablehandlermethod.java:219)     @ org.springframework.web.method.support.invocablehandlermethod.invokeforrequest(invocablehandlermethod.java:132)     @ org.springframework.web.servlet.mvc.method.annotation.servletinvocablehandlermethod.invokeandhandle(servletinvocablehandlermethod.java:104)     @ org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter.invokehandlemethod(requestmappinghandleradapter.java:745)     @ org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter.handleinternal(requestmappinghandleradapter.java:686)     @ org.springframework.web.servlet.mvc.method.abstracthandlermethodadapter.handle(abstracthandlermethodadapter.java:80)     @ org.springframework.web.servlet.dispatcherservlet.dodispatch(dispatcherservlet.java:925)     @ org.springframework.web.servlet.dispatcherservlet.doservice(dispatcherservlet.java:856)     @ org.springframework.web.servlet.frameworkservlet.processrequest(frameworkservlet.java:920)     @ org.springframework.web.servlet.frameworkservlet.dopost(frameworkservlet.java:827)     @ javax.servlet.http.httpservlet.service(httpservlet.java:647)     @ org.springframework.web.servlet.frameworkservlet.service(frameworkservlet.java:801)     @ javax.servlet.http.httpservlet.service(httpservlet.java:728)     @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:305)     @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:210)     @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:222)     @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:123)     @ org.apache.catalina.authenticator.authenticatorbase.invoke(authenticatorbase.java:472)     @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:171)     @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:99)     @ org.apache.catalina.valves.accesslogvalve.invoke(accesslogvalve.java:947)     @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:118)     @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:408)     @ org.apache.coyote.http11.abstracthttp11processor.process(abstracthttp11processor.java:1009)     @ org.apache.coyote.abstractprotocol$abstractconnectionhandler.process(abstractprotocol.java:589)     @ org.apache.tomcat.util.net.jioendpoint$socketprocessor.run(jioendpoint.java:312)     @ java.util.concurrent.threadpoolexecutor$worker.runtask(threadpoolexecutor.java:895)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:918)     @ java.lang.thread.run(thread.java:680) 

other data loaded onto object yearpublished throws error. following code jsp form populates catalogueentry item:

<form:form method="post" action="addcatalogueentry" commandname="catalogueentry">         <table>           <tr>             <td><form:label path="title">title of book:</form:label></td>             <td><form:input path="title"/></td>           </tr>           <tr>             <td><form:label path="yearpublished">year published:</form:label></td>             <td><form:input path="yearpublished"/></td>           </tr>           <tr>             <td><form:label path="isbn">isbn number:</form:label></td>             <td><form:input path="isbn"/></td>           </tr>           <tr>             <td><form:label path="publisher">publisher:</form:label></td>             <td><form:input path="publisher"/></td>           </tr>           <tr>             <td><form:label path="countryofpublication">country of publication</form:label></td>             <td><form:input path="countryofpublication"/></td>           </tr>           <tr>             <td><form:label path="authors">authors</form:label></td>             <td><form:input path="authors"/></td>           </tr>            <!--<c:foreach items="$catalogueentry.authorlist" var="author" varstatus="status">             <tr>                 <td>first name</td>                 <td><input name="authorlist[${status.index}].firstname" id="authorlist[${status.index}].firstname"/></td>                 <%--                     <td><form:input path="personlist[${i.index}].name" id="name${i.index}" /></td>                     <td><form:input path="personlist[${i.index}].age" id="age${i.index}" /></td>                  --%>              </tr>             <tr>                 <td>last name</td>                 <td><input name="authorlist[${status.index}].lastname" id="authorlist[${status.index}].lastname"/></td>             </tr>           </c:foreach>           -->           <tr>             <td><input type="submit" value="clear" /></td>             <td><input type="submit" value="submit" /></td>           </tr>         </table>     </form:form> 

the getters , setters field is:

private integer yearpublished;  @column(name="year_published") @notnull public integer getyearpublished() {     return yearpublished; }  public void setyearpublished(int yearpublished) {     this.yearpublished = yearpublished; } 

use non-primitive wrapper types (eg. integer int , float float).