java - Hibernate set up -

i writing first hibernate program, unable connect database
details:db: oracle 11g version 2
hibernate: 4.3.7.
could please verify config file:

hibernate.cfg.xml:

    <?xml version="1.0" encoding="utf-8"?>       <hibernate-configuration xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"           xsi:schemalocation="http://www.hibernate.org/xsd/     hibernate-configuration hibernate-configuration-           4.0.xsd"         xmlns="http://www.hibernate.org/xsd/hibernate-configuration">          <session-factory>        <!-- database connection settings -->         <property name="connection.driver_class">oracle.jdbc.oracledriver</property>        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>      <property name="connection.username">sys</property>      <property name="connection.password">admin123</property>          <!-- jdbc connection pool (use built-in) -->        <property name="connection.pool_size">1</property>         <!-- sql dialect -->         <property name="dialect">org.hibernate.dialect.oracle10gdialect</property>      <!-- enable hibernate's automatic session context management -->       <property name="current_session_context_class">thread</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">create</property>        <!-- names annotated entity class -->        <mapping class="com.hp.dto.userdetails"/>      <mapping resource="org/hibernate/tutorial/domain/event.hbm.xml"/>   </session-factory>    </hibernate-configuration> 

java class:

   import javax.persistence.entity;      import javax.persistence.id;      @entity      public class userdetails  {      @id     private int userid;     private string username;      public int getuserid() {         return userid;     }     public void setuserid(int userid)   {         this.userid = userid;     }     public string getusername() {         return username;     }     public void setusername(string username) {         this.username = username;     }  } 

manager class:

  public class hibernatetest     {     public static void main(string[] args){      userdetails user=new userdetails();     user.setuserid(1);     user.setusername("first user");      sessionfactory sessionfactory=new configuration().configure().buildsessionfactory();     session session= sessionfactory.opensession();     session.begintransaction();     session.save(user);     session.gettransaction().commit();      }  } 

exception:

 info: hhh000043: configuring resource: /hibernate.cfg.xml dec 16, 2014 5:13:24 pm org.hibernate.cfg.configuration getconfigurationinputstream info: hhh000040: configuration resource: /hibernate.cfg.xml exception in thread "main" org.hibernate.mappingexception: invalid configuration     @ org.hibernate.cfg.configuration.doconfigure(configuration.java:2160)     @ org.hibernate.cfg.configuration.configure(configuration.java:2077)     @ org.hibernate.cfg.configuration.configure(configuration.java:2056)     @ com.hp.hibernate.hibernatetest.main(hibernatetest.java:18) caused by: org.xml.sax.saxparseexception; linenumber: 2; columnnumber: 25; document invalid: no grammar found.     @ com.sun.org.apache.xerces.internal.util.errorhandlerwrapper.createsaxparseexception(errorhandlerwrapper.java:198)     @ com.sun.org.apache.xerces.internal.util.errorhandlerwrapper.error(errorhandlerwrapper.java:134)     @ com.sun.org.apache.xerces.internal.impl.xmlerrorreporter.reporterror(xmlerrorreporter.java:437)     @ com.sun.org.apache.xerces.internal.impl.xmlerrorreporter.reporterror(xmlerrorreporter.java:368)     @ com.sun.org.apache.xerces.internal.impl.xmlerrorreporter.reporterror(xmlerrorreporter.java:325)     @ com.sun.org.apache.xerces.internal.impl.xmlnsdocumentscannerimpl.scanstartelement(xmlnsdocumentscannerimpl.java:228)     @ com.sun.org.apache.xerces.internal.impl.xmlnsdocumentscannerimpl$nscontentdriver.scanrootelementhook(xmlnsdocumentscannerimpl.java:605)     @ com.sun.org.apache.xerces.internal.impl.xmldocumentfragmentscannerimpl$fragmentcontentdriver.next(xmldocumentfragmentscannerimpl.java:3138)     @ com.sun.org.apache.xerces.internal.impl.xmldocumentscannerimpl$prologdriver.next(xmldocumentscannerimpl.java:880)     @ com.sun.org.apache.xerces.internal.impl.xmldocumentscannerimpl.next(xmldocumentscannerimpl.java:606)     @ com.sun.org.apache.xerces.internal.impl.xmlnsdocumentscannerimpl.next(xmlnsdocumentscannerimpl.java:117)     @ com.sun.org.apache.xerces.internal.impl.xmldocumentfragmentscannerimpl.scandocument(xmldocumentfragmentscannerimpl.java:510)     @ com.sun.org.apache.xerces.internal.parsers.xml11configuration.parse(xml11configuration.java:848)     @ com.sun.org.apache.xerces.internal.parsers.xml11configuration.parse(xml11configuration.java:777)     @ com.sun.org.apache.xerces.internal.parsers.xmlparser.parse(xmlparser.java:141)     @ com.sun.org.apache.xerces.internal.parsers.abstractsaxparser.parse(abstractsaxparser.java:1213)     @ com.sun.org.apache.xerces.internal.jaxp.saxparserimpl$jaxpsaxparser.parse(saxparserimpl.java:648)     @ org.dom4j.io.saxreader.read(saxreader.java:465)     @ org.hibernate.cfg.configuration.doconfigure(configuration.java:2157)     ... 3 more 

remove schema declaration:

<hibernate-configuration xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"       xsi:schemalocation="http://www.hibernate.org/xsd/hibernate-configuration hibernate-configuration-4.0.xsd"     xmlns="http://www.hibernate.org/xsd/hibernate-configuration"> 

so is:

<hibernate-configuration> 

if want schema validation, use dtd instead: