exception - org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped [from User] where User is my bean class -

i using hibernate gwt want retrieve data table, have created dto class , simple java class in have initialized dto object.

in server side storing result in array list , using each loop storing query result user type , calling private method using dto object.

my code fine getting below exception...and while retrieving firing "from user" query user simple bean class

this hibernate.cfg.xml file

<?xml version='1.0' encoding='utf-8'?> <!doctype hibernate-configuration public         "-//hibernate/hibernate configuration dtd 3.0//en"         "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">  <hibernate-configuration>      <session-factory>          <!-- database connection settings -->         <property name="connection.driver_class">com.mysql.jdbc.driver</property>         <property name="connection.url">jdbc:mysql://localhost:3306/rs</property>         <property name="connection.username">root</property>         <property name="connection.password">root</property>         <property name="connection.release_mode">auto</property>         <!-- jdbc connection pool (use built-in) -->         <property name="connection.pool_size">10</property>          <!-- mysql dialect -->         <property name="dialect">org.hibernate.dialect.mysqldialect</property>          <!-- disable second-level cache  -->         <property name="cache.provider_class">org.hibernate.cache.internal.nocacheprovider</property>          <!-- echo executed sql stdout -->         <property name="show_sql">true</property>          <!-- drop , re-create database schema on startup -->         <property name="hbm2ddl.auto">update</property>         <property name="hibernate.hbm2ddl.import_files"></property>          <!-- names annotated entity class -->          <mapping class="com.valto.querybrowser.client.model.user"/>         <mapping class="com.valto.querybrowser.client.model.userdto"/>      </session-factory> </hibernate-configuration> 

this dto class userdto.java

    @entity(name="usertable")     @table(name="usertable")     public class userdto implements serializable{          private static final long serialversionuid = -5753020447289277291l;          @id @generatedvalue(strategy=generationtype.identity)         @column(name="userid")         private int id;         @column(name="user_name")         private string user_name;          public userdto()         {          }         public userdto(int id)         {             this.id=id;          }         public userdto(int id,string user_name)         {             this.id=id;             this.user_name=user_name;          }          public int getid() {             return id;         }         public void setid(int id) {             this.id = id;         }         public string getuser_name() {             return user_name;         }         public void setuser_name(string user_name) {             this.user_name = user_name;         }       } 

this simple bean class user.java

public class user {      public int id;     public string user_name;     public user(userdto udto)     {         id=udto.getid();         user_name=udto.getuser_name();     } } 

and server side code..

@override     public list<userdto> getusers(string getinput) throws illegalargumentexception {          session session = sessionfacorycode.getsessionfactory().opensession();         system.out.println(getinput+"\n");           try {             session.begintransaction();              list<user> user = new arraylist<user>(session.createquery(getinput).list());                 list<userdto> userdto = new arraylist<userdto>(user != null ? user.size() : 0);                 if (user != null) {                   (user user1 : user) {                   userdto.add(createuserdto(user1));                   }                 }             session.gettransaction().commit();             return userdto;           } catch (exception e) {             getinput=null;             e.printstacktrace();             return null;         } {             session.close();         }      }      private userdto createuserdto(user user1) {          return new userdto(user1.id,user1.user_name);     } 

this sessionfactorycode.java

public class sessionfacorycode {     private static final sessionfactory sessionfactory;      static {             try {                 configuration cfg = new configuration().configure();                          serviceregistry serviceregistry = new serviceregistrybuilder()                . applysettings(cfg.getproperties()).buildserviceregistry();                 sessionfactory =cfg.buildsessionfactory(serviceregistry);                } catch (throwable th) {                     system.err.println("enitial sessionfactory creation failed" + th);                     throw new exceptionininitializererror(th);             }     }     public static sessionfactory getsessionfactory() {             return sessionfactory;     }  } 

this error after adding @entity in user.java...

caused by: org.hibernate.annotationexception: no identifier specified entity: com.valto.querybrowser.client.model.user     @ org.hibernate.cfg.inheritancestate.determinedefaultaccesstype(inheritancestate.java:277)     @ org.hibernate.cfg.inheritancestate.getelementstoprocess(inheritancestate.java:224)     @ org.hibernate.cfg.annotationbinder.bindclass(annotationbinder.java:665)     @ org.hibernate.cfg.configuration$metadatasourcequeue.processannotatedclassesqueue(configuration.java:3533)     @ org.hibernate.cfg.configuration$metadatasourcequeue.processmetadata(configuration.java:3487)     @ org.hibernate.cfg.configuration.secondpasscompile(configuration.java:1376)     @ org.hibernate.cfg.configuration.buildsessionfactory(configuration.java:1777)     @ com.valto.querybrowser.client.model.sessionfacorycode.<clinit>(sessionfacorycode.java:16)     ... 36 more [error] 500 - post /querybrowser/greet (127.0.0.1) 57 bytes    request headers       host: 127.0.0.1:8888       connection: keep-alive       content-length: 145       x-gwt-module-base: http://127.0.0.1:8888/querybrowser/       x-gwt-permutation: hostedmode       origin: http://127.0.0.1:8888       user-agent: mozilla/5.0 (windows nt 6.1) applewebkit/537.36 (khtml, gecko) chrome/37.0.2062.120 safari/537.36       content-type: text/x-gwt-rpc; charset=utf-8       accept: */*       referer: http://127.0.0.1:8888/querybrowser.html?gwt.codesvr=127.0.0.1:9997       accept-encoding: gzip,deflate       accept-language: en-gb,en-us;q=0.8,en;q=0.6    response headers       content-type: text/plain    [warn] exception while dispatching incoming rpc call com.google.gwt.user.server.rpc.unexpectedexception: service method 'public abstract java.util.list com.valto.querybrowser.client.greetingservice.gettablenames() throws java.lang.illegalargumentexception' threw unexpected exception: java.lang.noclassdeffounderror: not initialize class com.valto.querybrowser.client.model.sessionfacorycode     @ com.google.gwt.user.server.rpc.rpc.encoderesponseforfailure(rpc.java:389)     @ com.google.gwt.user.server.rpc.rpc.invokeandencoderesponse(rpc.java:579)     @ com.google.gwt.user.server.rpc.remoteserviceservlet.processcall(remoteserviceservlet.java:265)     @ com.google.gwt.user.server.rpc.remoteserviceservlet.processpost(remoteserviceservlet.java:305)     @ com.google.gwt.user.server.rpc.abstractremoteserviceservlet.dopost(abstractremoteserviceservlet.java:62)     @ javax.servlet.http.httpservlet.service(httpservlet.java:755)     @ javax.servlet.http.httpservlet.service(httpservlet.java:848)     @ org.eclipse.jetty.servlet.servletholder.handle(servletholder.java:686)     @ org.eclipse.jetty.servlet.servlethandler.dohandle(servlethandler.java:501)     @ org.eclipse.jetty.server.handler.scopedhandler.handle(scopedhandler.java:137)     @ org.eclipse.jetty.security.securityhandler.handle(securityhandler.java:557)     @ org.eclipse.jetty.server.session.sessionhandler.dohandle(sessionhandler.java:231)     @ org.eclipse.jetty.server.handler.contexthandler.dohandle(contexthandler.java:1086)     @ org.eclipse.jetty.servlet.servlethandler.doscope(servlethandler.java:428)     @ org.eclipse.jetty.server.session.sessionhandler.doscope(sessionhandler.java:193)     @ org.eclipse.jetty.server.handler.contexthandler.doscope(contexthandler.java:1020)     @ org.eclipse.jetty.server.handler.scopedhandler.handle(scopedhandler.java:135)     @ org.eclipse.jetty.server.handler.handlerwrapper.handle(handlerwrapper.java:116)     @ org.eclipse.jetty.server.handler.requestloghandler.handle(requestloghandler.java:68)     @ org.eclipse.jetty.server.handler.handlerwrapper.handle(handlerwrapper.java:116)     @ org.eclipse.jetty.server.server.handle(server.java:370)     @ org.eclipse.jetty.server.abstracthttpconnection.handlerequest(abstracthttpconnection.java:489)     @ org.eclipse.jetty.server.abstracthttpconnection.content(abstracthttpconnection.java:960)     @ org.eclipse.jetty.server.abstracthttpconnection$requesthandler.content(abstracthttpconnection.java:1021)     @ org.eclipse.jetty.http.httpparser.parsenext(httpparser.java:865)     @ org.eclipse.jetty.http.httpparser.parseavailable(httpparser.java:240)     @ org.eclipse.jetty.server.asynchttpconnection.handle(asynchttpconnection.java:82)     @ org.eclipse.jetty.io.nio.selectchannelendpoint.handle(selectchannelendpoint.java:668)     @ org.eclipse.jetty.io.nio.selectchannelendpoint$1.run(selectchannelendpoint.java:52)     @ org.eclipse.jetty.util.thread.queuedthreadpool.runjob(queuedthreadpool.java:608)     @ org.eclipse.jetty.util.thread.queuedthreadpool$3.run(queuedthreadpool.java:543)     @ java.lang.thread.run(unknown source) caused by: java.lang.noclassdeffounderror: not initialize class com.valto.querybrowser.client.model.sessionfacorycode     @ com.valto.querybrowser.server.greetingserviceimpl.gettablenames(greetingserviceimpl.java:33)     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method)     @ sun.reflect.nativemethodaccessorimpl.invoke(unknown source)     @ sun.reflect.delegatingmethodaccessorimpl.invoke(unknown source)     @ java.lang.reflect.method.invoke(unknown source)     @ com.google.gwt.user.server.rpc.rpc.invokeandencoderesponse(rpc.java:561)     ... 30 more 

this piece of code causing problem.

list<user> user = new arraylist<user>(session.createquery(getinput).list()); 

you trying fetch list database, , don not have table mapped against user.

@entity required added user.java.