Spring - java.lang.NumberFormatException: For input string -

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i'm trying list of users , associated objects using dto. far there error.

model

 public class userentity      @onetomany(cascade=cascadetype.all, fetch=fetchtype.lazy, mappedby="setter")     private set<module> smodule = new hashset<module>();      @onetomany(cascade=cascadetype.all, fetch=fetchtype.lazy, mappedby="checker")     private set<module> cmodule = new hashset<module>();       //getters , setters

dto

   public class userentitydto {  private list<module> smodule = new arraylist<module>(); private list<module> cmodule = new arraylist<module>();

controller

   @requestmapping(value = "/main/user/testing", method = requestmethod.get)     public string getrecords(model model) {            list<userentity> users = userservice.getuserentity();        list<userentitydto> usersdto = new arraylist<userentitydto>();        (userentity user: users) {        userentitydto dto = new userentitydto();        dto.setuserid(user.getuserid());       dto.setname(user.getname());       dto.setsmodule(moduleservice.getsettermodules(user.getuserid()));       dto.setcmodule(moduleservice.getcheckermodules(user.getuserid()));        usersdto.add(dto);      }       model.addattribute("users", usersdto);     return "/main/user/testing";  }

jsp page

   <table>         <tr>             <th>user id</th>                     <th>user name</th>                     <th>module</th>               </tr>         <c:foreach items="${users}" var="setter" >              <c:foreach items="${users.smodule}" var="module" >             <tr>                 <td><c:out value="${setter.userid}" escapexml="true" /></td>                 <td><c:out value="${setter.name}" escapexml="true" /></td>                   <td><c:out value="${module.modulecode}" escapexml="true" /></td>                 <td><c:out value="${module.modulename}" escapexml="true" /></td>                 <td><c:out value="${module.modulestatus}" escapexml="true" /></td>              </tr>             </c:foreach>         </c:foreach>     </table>

the stacktrace

    java.lang.numberformatexception: input string: "smodule" java.lang.numberformatexception.forinputstring(numberformatexception.java:65) java.lang.integer.parseint(integer.java:492) java.lang.integer.parseint(integer.java:527) javax.el.listelresolver.coerce(listelresolver.java:173) javax.el.listelresolver.getvalue(listelresolver.java:52) org.apache.jasper.el.jasperelresolver.getvalue(jasperelresolver.java:104) org.apache.el.parser.astvalue.getvalue(astvalue.java:183) org.apache.el.valueexpressionimpl.getvalue(valueexpressionimpl.java:185) org.apache.jasper.el.jspvalueexpression.getvalue(jspvalueexpression.java:106) org.apache.jsp.web_002dinf.views.main.user.testing_jsp._jspx_meth_c_005fforeach_005f1(testing_jsp.java:204) org.apache.jsp.web_002dinf.views.main.user.testing_jsp._jspx_meth_c_005fforeach_005f0(testing_jsp.java:172) org.apache.jsp.web_002dinf.views.main.user.testing_jsp._jspservice(testing_jsp.java:111) org.apache.jasper.runtime.httpjspbase.service(httpjspbase.java:70) javax.servlet.http.httpservlet.service(httpservlet.java:728) org.apache.jasper.servlet.jspservletwrapper.service(jspservletwrapper.java:432) org.apache.jasper.servlet.jspservlet.servicejspfile(jspservlet.java:390) org.apache.jasper.servlet.jspservlet.service(jspservlet.java:334) javax.servlet.http.httpservlet.service(httpservlet.java:728) org.springframework.web.servlet.view.internalresourceview.rendermergedoutputmodel(internalresourceview.java:238) org.springframework.web.servlet.view.abstractview.render(abstractview.java:264) org.springframework.web.servlet.dispatcherservlet.render(dispatcherservlet.java:1208) org.springframework.web.servlet.dispatcherservlet.processdispatchresult(dispatcherservlet.java:992) org.springframework.web.servlet.dispatcherservlet.dodispatch(dispatcherservlet.java:939) org.springframework.web.servlet.dispatcherservlet.doservice(dispatcherservlet.java:856) org.springframework.web.servlet.frameworkservlet.processrequest(frameworkservlet.java:915) org.springframework.web.servlet.frameworkservlet.doget(frameworkservlet.java:811) javax.servlet.http.httpservlet.service(httpservlet.java:621) org.springframework.web.servlet.frameworkservlet.service(frameworkservlet.java:796) javax.servlet.http.httpservlet.service(httpservlet.java:728) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:330) org.springframework.security.web.access.intercept.filtersecurityinterceptor.invoke(filtersecurityinterceptor.java:118) org.springframework.security.web.access.intercept.filtersecurityinterceptor.dofilter(filtersecurityinterceptor.java:84) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.access.exceptiontranslationfilter.dofilter(exceptiontranslationfilter.java:113) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.session.sessionmanagementfilter.dofilter(sessionmanagementfilter.java:103) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.authentication.anonymousauthenticationfilter.dofilter(anonymousauthenticationfilter.java:113) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.servletapi.securitycontextholderawarerequestfilter.dofilter(securitycontextholderawarerequestfilter.java:54) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.savedrequest.requestcacheawarefilter.dofilter(requestcacheawarefilter.java:45) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.authentication.www.basicauthenticationfilter.dofilter(basicauthenticationfilter.java:150) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.authentication.abstractauthenticationprocessingfilter.dofilter(abstractauthenticationprocessingfilter.java:183) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.authentication.logout.logoutfilter.dofilter(logoutfilter.java:105) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.context.securitycontextpersistencefilter.dofilter(securitycontextpersistencefilter.java:87) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.access.channel.channelprocessingfilter.dofilter(channelprocessingfilter.java:144) org.springframework.security.web.filterchainproxy$virtualfilterchain.dofilter(filterchainproxy.java:342) org.springframework.security.web.filterchainproxy.dofilterinternal(filterchainproxy.java:192) org.springframework.security.web.filterchainproxy.dofilter(filterchainproxy.java:160) org.springframework.web.filter.delegatingfilterproxy.invokedelegate(delegatingfilterproxy.java:346) org.springframework.web.filter.delegatingfilterproxy.dofilter(delegatingfilterproxy.java:259)

it taking exception @ child objects want retrieve. how can make sure field want can accepted.

you're accessing modules in jsp in wrong way.

this:

<c:foreach items="${users}" var="setter" >     <c:foreach items="${users.smodule}" var="module" >

tries access smodule member of users, , since users list tries convert smodule integer , use index.

it should be:

<c:foreach items="${users}" var="user" >     <c:foreach items="${user.smodule}" var="module" >

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