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Why am I facing this error? - java.lang.ExceptionInInitializerError

I am creating a simple Laptop-info form using JSF and Hibernate in IntelliJ IDEA. When I execute my project then I face this error:
javax.servlet.ServletException: java.lang.ExceptionInInitializerError
javax.faces.webapp.FacesServlet.service(FacesServlet.java:667)
Here I list the required files and directory structure.
LaptopDAO.java
package Dao;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import pojo.Laptop;
import util.HibernateUtil;
public class LaptopDAO {
public void SaveLaptop(Laptop laptop)
{
Session session = HibernateUtil.getSessionFactory().openSession();
Transaction t = session.beginTransaction();
session.save(laptop);
t.commit();
session.close();
}
}
Laptop.hbm.xml
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="pojo.Laptop" table="laptopdb">
<id name="id"><generator class="increment"></generator></id>
<property name="company">
<column name="laptopcompany"></column>
</property>
<property name="model">
<column name="laptopmodel"></column>
</property>
<property name="ram">
<column name="laptopram"></column>
</property>
<property name="hd">
<column name="laptophd"></column>
</property>
</class>
</hibernate-mapping>
Class LaptopBean
package LaptopMBean;
import Dao.LaptopDAO;
import pojo.Laptop;
import javax.faces.bean.ManagedBean;
#ManagedBean(name = "laptopBean")
public class LaptopBean {
Laptop l;
public LaptopBean()
{
l = new Laptop();
}
public Laptop getL()
{
return l;
}
public void setL(Laptop l)
{
this.l = l;
}
public void savetoDB()
{
LaptopDAO ld = new LaptopDAO();
ld.SaveLaptop(l);
System.out.print("Success");
}
}
Class Laptop
package pojo;
public class Laptop {
int id;
String company;
String model;
String ram;
String hd;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCompany() {
return company;
}
public void setCompany(String company) {
this.company = company;
}
public String getModel() {
return model;
}
public void setModel(String model) {
this.model = model;
}
public String getRam() {
return ram;
}
public void setRam(String ram) {
this.ram = ram;
}
public String getHd() {
return hd;
}
public void setHd(String hd) {
this.hd = hd;
}
}
Class HibernateUtil
package util;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil
{
private static final SessionFactory sessionFactory = buildSessionFactory();
public static SessionFactory buildSessionFactory()
{
try
{
return new Configuration().configure().buildSessionFactory();
}
catch (Throwable ex)
{
System.err.println("Initial SessionFactory creation failed. " + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory()
{
return sessionFactory;
}
}
File hibernate.cfg.xml
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.url">jdbc:mysql://localhost:3306/laptop</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.username">root</property>
<property name="connection.password">admin</property>
<property name="connection.pool_size">1</property>
<mapping resource="hbm/laptop.hbm.xml"/>
</session-factory>
</hibernate-configuration>
StackTrace
23:44:51,700 INFO [org.hibernate.validator.internal.util.Version] (default
task-4) HV000001: Hibernate Validator 5.1.3.Final
23:44:52,080 INFO [org.hibernate.Version] (default task-4) HHH000412:
Hibernate Core {5.4.0.Final}
23:44:52,084 INFO [org.hibernate.cfg.Environment] (default task-4)
HHH000206: hibernate.properties not found
23:44:52,091 ERROR [stderr] (default task-4) Initial SessionFactory creation
failed.java.lang.NoClassDefFoundError:
net/bytebuddy/NamingStrategy$SuffixingRandom$BaseNameResolver
23:44:52,092 WARNING [javax.enterprise.resource.webcontainer.jsf.lifecycle]
(default task-4) #{laptopBean.savetoDB()}:
java.lang.ExceptionInInitializerError: javax.faces.FacesException: #
{laptopBean.savetoDB()}:
I have added all libraries. How can I find out what the problem is?

Exception in thread "main" org.hibernate.MappingException

Test:
import java.util.GregorianCalendar;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import it.s.monitoringDoor.model.Door_Open;
import it.s.monitoringDoor.model.HibernateUtilities;
public class TestHibernate {
public static void main(String[] args){
SessionFactory factory = HibernateUtilities.getSessionFactory();
Door_Open d = new Door_Open();
d.setId(1);
d.setId_door(1);;
d.setTimestamp(getTime());
Session s = factory.openSession();
Transaction t = s.getTransaction();
t.begin();
s.save(d);
t.commit();
}
private static Date getTime(){
GregorianCalendar gc = new GregorianCalendar();
return gc.getTime();
}
}
HibernateUtilities:
package it.s.monitoringDoor.model;
import java.util.Properties;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
public class HibernateUtilities {
//XML based configuration
private static SessionFactory sessionFactory;
private static SessionFactory buildSessionFactory() {
try {
// Create the SessionFactory from hibernate.cfg.xml
Configuration configuration = new Configuration();
configuration.configure("hibernate.cfg.xml");
System.out.println("Hibernate Configuration loaded");
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
System.out.println("Hibernate serviceRegistry created");
SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
return sessionFactory;
}
catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
if(sessionFactory == null)
sessionFactory = buildSessionFactory();
return sessionFactory;
}
}
The Pojo class Door_Open.java
package it.selco.monitoringDoor.model;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "door_open")
public class Door_Open {
//---------------- Instance variables ----------------
#Id
#GeneratedValue
#Column(name = "id")
private int id;
#Column(name = "id_door", nullable = false)
private int id_door;
#Column(name = "id_door", nullable = false)
private Date timestamp;
//-------------------- Constructor --------------------
public Door_Open (){
;
}
public Door_Open(int id_door, Date timestamp) {
setId_door(id_door);
setTimestamp(timestamp);
}
//--------------------- Get & Set ---------------------
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
#SuppressWarnings("unused")
private int getId_door() {
return id_door;
}
public void setId_door(int id_door) {
this.id_door = id_door;
}
#SuppressWarnings("unused")
private Date getTimestamp() {
return timestamp;
}
public void setTimestamp(Date timestamp) {
this.timestamp = timestamp;
}
//--------------------- Methods ----------------------
//TODO Auto-generated methods variables block
}
hibernate.cfg.xml
<?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 name="">
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/monitor_door</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password"/>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- ############################################
# mapping files with external dependencies #
############################################ -->
<mapping resource="it/s/monitoringDoor/model/Door_Open.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Door_Open.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Door_Open" table="door_open" schema="monitor_door">
<id name="id" type="int" column="id">
<generator class="native"/>
</id>
<property name="id_door" column="id_door" type="int" not-null="true"/>
<property name="timestamp" column="timestamp" type="timestamp" not-null="true"/>
</class>
</hibernate-mapping>
When I run the test is returned me the following error.
Exception in thread "main" org.hibernate.MappingException: Unknown entity: it.s.monitoringDoor.model.Door_Open
[...]
some advice?

Look at the package of your Door_Open class, it is: it.selco.monitoringDoor.model while in hibernate.cfg.xml the Door_Open.hbm.xml file is at: <mapping resource="it/s/monitoringDoor/model/Door_Open.hbm.xml"/>. The package and the mapping resource path do not match, they should be the same e.g. it/selco/monitoringDoor/model/Door_Open.hbm.xml
and of course move the Door_Open.hbm.xml to be in the same path as its class.
Hope this helps.
PS, why are you using both annotations (e.g. #Entity) and hbm mapping for your class? I think you should choose one not both.

NullPointerException on Hibernate new Configuration();

This is my first time trying out Hibernate with Eclipse and the following are the things I did:
Created a Java Bean called Student.java which is as follows:
package com.jwt.hibernate;
public class Student {
private long id;
private String name;
private String degree;
private String roll;
private String phone;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDegree() {
return degree;
}
public void setDegree(String degree) {
this.degree = degree;
}
public String getRoll() {
return roll;
}
public void setRoll(String roll) {
this.roll = roll;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
}
Created a mapping file, Student.hbm.xml as follows:
<hibernate-mapping>
<class name="com.jwt.hibernate.Student" table="student">
<id column="ID" name="id" type="long" />
<property column="name" name="name" type="string" />
<property column="degree" name="degree" type="string" />
<property column="roll" name="roll" type="string" />
<property column="phone" name="phone" type="string" />
</class>
</hibernate-mapping>
3. Created the hibernate configuration file, hibernate.cfg.xml as follows:
<?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>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernatetutorial</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="hbm2ddl.auto">create </property>
<mapping resource="com/jwt/hibernate/Student.hbm.xml" />
</session-factory>
</hibernate-configuration>
Created the class SimpleTest.java which is as follows:
package com.jwt.hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
public class SimpleTest {
public static void main(String[] args) {
Configuration cfg = new Configuration();
cfg.configure("hibernate.cfg.xml");
SessionFactory factory = cfg.buildSessionFactory();
Session session = factory.openSession();
Student student = new Student();
student.setName("Mukesh");
student.setRoll("101");
student.setPhone("8888");
student.setDegree("B.E");
Transaction tx = session.beginTransaction();
session.save(student);
System.out.println("Object saved successfully.....!!");
tx.commit();
session.close();
factory.close();
}
}
Now, when I try to run SimpleTest, I get the following error:
**INFO: HHH000412: Hibernate Core {4.3.7.Final}
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.hibernate.cfg.Configuration.reset(Configuration.java:326)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:291)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:295)
at com.jwt.hibernate.SimpleTest.main(SimpleTest.java:11)
Caused by: java.lang.NullPointerException
at org.hibernate.internal.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
at org.hibernate.cfg.Environment.<clinit>(Environment.java:221)
... 4 more**
I double checked and made sure that all the configuration and jar files were added to the classpath. So that is not the problem. I would really appreciate some insights as to what may have caused this problem and inturn, how to solve it.
Thanks in advance!

I would recommend updating to later version of SLF4J.
Or
Your Hibernate.cfg.xml is not on classpath. What folder is it in?
Edit :
Caused by: java.lang.NullPointerException
at org.hibernate.internal.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
This is actual exception in your code, If your Hibernate.cfg.xml is loaded then check for SELF4J version, Don't use user library to take your jar files, put all libraries in your lib folder and then configure those in class path.

You may find a Java Configuration of Hibernate to be more friendly. Here is an example of one that I did (Note: there are Spring annotations like #Autowired and #PostConstruct in this class so don't get confused):
public class HibernateConfigBean {
private static final Logger logger = Logger.getLogger(HibernateConfigBean.class);
#Autowired private Environment environment;
private SessionFactory sessionFactory;
private Configuration configuration;
#PostConstruct
private void init(){
configuration = new Configuration();
configuration.setProperty("hibernate.dialect", environment.getProperty("hibernate.dialect"));
configuration.setProperty("hibernate.connection.driver_class", environment.getProperty("hibernate.connection.driver_class"));
configuration.setProperty("hibernate.connection.url", environment.getProperty("hibernate.connection.url"));
configuration.setProperty("hibernate.connection.username", environment.getProperty("db_username"));
configuration.setProperty("hibernate.connection.password", environment.getProperty("db_password"));
//Add additional Annotated Classes here
configuration.addAnnotatedClass(UserEntity.class);
StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties());
sessionFactory = configuration.buildSessionFactory(builder.build());
}
public SessionFactory getSessionFactory(){
return sessionFactory;
}
//This should be visible outside of the package as it's only used by the GenerateDbSchema class
void generateSchema() throws Exception {
try{
new SchemaExport(configuration).create(false, true);
} catch (RuntimeException re){
throw new Exception(re);
}
}
}
Then I just put my values into a properties file :-)

Hibernate tutorial. Connection refused: connect

I want to learn how Hibernate works, so found this tutorial. But i get this error:
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
org.hibernate.HibernateException: Could not parse configuration: hibernate.cfg.xml
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1491)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1425)
at mypackage.StoreData.main(StoreData.java:14)
Caused by: org.dom4j.DocumentException: Connection refused: connect Nested exception: Connection refused: connect
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1481)
... 2 more
I found out, that many people have the same issue with the same tutorial. For example link, or another link.
Another issue is, that it takes far to long to show the error after starting the programm(40 sek).
Here is my main class:
package mypackage;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
public class StoreData {
public static void main(String[] args) {
try {
// creating configuration object
Configuration cfg = new Configuration();
cfg.configure("hibernate.cfg.xml");// populates the data of the
// configuration file
// creating seession factory object
SessionFactory factory = cfg.buildSessionFactory();
// creating session object
Session session = factory.openSession();
// creating transaction object
Transaction transaction = session.beginTransaction();
Employee e1 = new Employee();
e1.setId(115);
e1.setFirstName("Elvis");
e1.setLastName("Presley");
session.persist(e1);// persisting the object
transaction.commit();// transaction is committed
session.close();
System.out.println("successfully saved");
}catch (HibernateException ex) {
ex.printStackTrace();
}
catch (Exception ex) {
ex.printStackTrace();
}
}
}
Hibernate configuration 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>
<property name="dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="hibernate.connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
<property name="hibernate.connection.url">jdbc:sqlserver://127.0.0.1:1433;databaseName=hibernatetutorial;</property>
<property name="hibernate.connection.username">username</property>
<property name="hibernate.connection.password">password</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<property name="show_sql">true</property>
<mapping resource="employee.hbm.xml" />
</session-factory>
</hibernate-configuration>
Employee xml:
<?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-mapping>
<class name="mypackage.Employee" table="emp1000">
<id name="id">
<generator class="assigned"></generator>
</id>
<property name="firstName"></property>
<property name="lastName"></property>
</class>
</hibernate-mapping>
and Employee.java:
package mypackage;
public class Employee {
private int id;
private String firstName;
private String lastName;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
And this are my jars and all files.
Someone knows what is the issue here?

in your Hibernate configuration file, mapping is commented, and
<property name="hibernate.hbm2ddl.auto">create_drop</property>
is supposed to be update, not create_drop

I was facing the same error. In my case with another hibernate maven tutorial, I just forgot to run the service like this:
mvn exec:java -Dexec.mainClass="org.hsqldb.Server" -Dexec.args="-database.0 file:target/data/tutorial"

Hibernate Mapping Exception:Unknown Mapping Entity :Theme

I want to map class Themes to themes table.
Themes.java
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Column;
public class Themes
{
private int id;
private String theme;
private int orderInfo;
public Themes(String theme,int order_info)
{
System.out.println("OK");
this.theme=theme;
this.orderInfo=order_info;
}
public int getId()
{
return id;
}
public void setId(int id)
{
this.id=id;
}
public String getTheme()
{
return theme;
}
public void setTheme(String theme)
{
this.theme=theme;
}
public int getOrder()
{
return orderInfo;
}
public void setOrder(int order_info)
{
this.orderInfo=order_info;
}
}
Themes.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Themes" table="themes">
<meta attribute="class-description">
This class contains theme details.
</meta>
<id name="id" type="int" column="id">
<generator class="native"/>
</id>
<property name="text" column="text" type="string"/>
<property name="orderInfo" column="order_info" type="int"/>
</class>
</hibernate-mapping>
hibernate.cfg.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration SYSTEM
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="hibernate.connection.driver_class">
com.mysql.jdbc.Driver
</property>
<!-- Assume test is the database name -->
<property name="hibernate.connection.url">
jdbc:mysql://localhost/content_templating_data
</property>
<property name="hibernate.connection.username">
root
</property>
<property name="hibernate.connection.password">
</property>
<!-- List of XML mapping files -->
<mapping resource="themes.hbm.xml"/>
<mapping resource="patterns.hbm.xml"/>
<mapping resource="filler.hbm.xml"/>
<mapping resource="sentences.hbm.xml"/>
</session-factory>
</hibernate-configuration>
I a reading the contents from a csv file and i want it to insert in a databse using the following code.
ManageData.java
import java.io.*;
import org.apache.log4j.BasicConfigurator;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class ManageData {
private static SessionFactory factory;
private static String csvfile="C:\\Users\\ANJANEY\\IdeaProjects\\hiveminds\\src\\file.csv";
private static String line="";
private static String splitby=",";
private static BufferedReader br=null;
private static SessionFactory getSessionFactory() {
// create configuration using hibernate API
Configuration configuration = new Configuration();
configuration.setProperty("connection.driver_class",
"com.mysql.jdbc.Driver");
configuration.setProperty("hibernate.connection.url",
"jdbc:mysql://localhost:3306/content_templating_data");
configuration.setProperty("hibernate.connection.username", "root");
configuration.setProperty("hibernate.connection.password", "");
return configuration.buildSessionFactory();
}
public static void main(String args[])throws IOException {
int count=0;
try
{
factory=getSessionFactory();
System.out.println("Factory Object created...");
}
catch (Throwable ex)
{
System.out.println("Failed to create Session Factory Object " + ex);
//throw new ExceptionInInitializerError();
}
try {
int order_info;
br = new BufferedReader(new FileReader(csvfile));
ManageData MD = new ManageData();
line = br.readLine();
int length=0;
while ((line = br.readLine()) != null) {
count++;
String[] str = line.split(splitby);
length=str.length;
order_info = Integer.parseInt(str[2]);
//Adding theme details in the theme table
Integer themeID = MD.addTheme(str[1], order_info);
}
}
catch(FileNotFoundException e)
{
e.printStackTrace();
}catch(IOException e){
e.printStackTrace();
}finally{
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
System.out.println("Done "+count);
}
//Method to add in theme table
public Integer addTheme(String theme,int order_info){
Session session = factory.openSession();
Transaction tx = null;
Integer themeID = new Integer(0);
try{
tx = session.beginTransaction();
Themes th=new Themes(theme,order_info);
themeID = (Integer) session.save(th);
System.out.println("OKAY");
tx.commit();
}catch (HibernateException e) {
if (tx!=null) tx.rollback();
e.printStackTrace();
}finally {
session.close();
}
return themeID;
}
I am getting the following error
Exception in thread "main" org.hibernate.MappingException: Unknown entity: Themes
at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:693)
at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1485)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:120)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:713)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:701)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:697)
at ManageData.addTheme(ManageData.java:114)
at ManageData.main(ManageData.java:66)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

The mistake is you should add your package name into the Themes.hbm.xml like <class name="my.package.Themes" table="themes"> than it works.
Another problem is that your mapping is not equivalent to your getter & setter and fields:
<property name="text" column="text" type="string"/>
<property name="orderInfo" column="order_info" type="int"/>
text does not exists change it to theme. And the orderInfo getter/setter should looks like:
public int getOrderInfo() {
return orderInfo;
}
public void setOrderInfo(int order_info) {
this.orderInfo = order_info;
}
Than the theme class works for me.
€dit: You can use something like that, too.
<hibernate-mapping package="my.package">
<class name="Themes" table="themes">
....
</hibernate-mapping>