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Hibernate and database connection problem (data not showing on JSP page)

Hibernate and database connection problem (data not showing on JSP page)
I want to show my table data on "ShowDetails.jsp". But its not showing, I tried via Hibernate mapping also but the same problem iI am facing..
I am new in Hibernate.
http://localhost:8081/jsp-hibernate-curd/ShowDetails.jsp
Exception:
java.lang.NoSuchFieldError: TRACE
at org.jboss.logging.Log4jLogger.translate(Log4jLogger.java:64)
at org.jboss.logging.Log4jLogger.isEnabled(Log4jLogger.java:39)
at org.jboss.logging.Logger.isTraceEnabled(Logger.java:98)
at org.hibernate.cfg.Configuration.<init>(Configuration.java:118)
at org.hibernate.cfg.AnnotationConfiguration.<init>(AnnotationConfiguration.java:87)
at org.com.dao.UserDao.<clinit>(UserDao.java:19)
at org.com.servlet.UserServlet.<init>(UserServlet.java:18)
Model Class(UserBean.java)
package org.com.bean;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="userdata")
public class UserBean {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name="id")
private int id;
#Column(name="name")
private String userName;
#Column(name="password")
private String userPass;
#Column(name="email")
private String userEmail;
#Column(name="country")
private String userCountry;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserPass() {
return userPass;
}
public void setUserPass(String userPass) {
this.userPass = userPass;
}
public String getUserEmail() {
return userEmail;
}
public void setUserEmail(String userEmail) {
this.userEmail = userEmail;
}
public String getUserCountry() {
return userCountry;
}
public void setUserCountry(String userCountry) {
this.userCountry = userCountry;
}
}
UserDao.class
package org.com.dao;
import java.util.List;
import org.com.bean.UserBean;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.AnnotationConfiguration;
public class UserDao {
private static SessionFactory sessionFactory;
static {
try {
sessionFactory= new AnnotationConfiguration().configure().buildSessionFactory();
}
catch(Throwable e)
{
System.out.println("Exception" + e);
throw new ExceptionInInitializerError(e);
}
}
public static SessionFactory getSessionFactory()
{
return sessionFactory;
}
#SuppressWarnings("unchecked")
public List <UserBean> getAllUser()
{
System.out.println("This is userDao Class");
Session session=null;
Transaction tx= null;
List<UserBean> listUserDetails = null;
try {
session= sessionFactory.openSession();
tx=session.beginTransaction();
listUserDetails = session.createQuery("from USERDATA").getResultList();
tx.commit();
}
catch(HibernateException e) {
if(tx!=null)
{
tx.rollback();
}
e.printStackTrace();
}
finally
{
session.close();
}
return listUserDetails;
}
}
Servlet Class(UserServlet.java)
package org.com.servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.com.bean.UserBean;
import org.com.dao.UserDao;
public class UserServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private UserDao userdao = new UserDao();
protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException,
IOException
{
System.out.println("*****************************************");
System.out.println("***********Servlet***************");
System.out.println("****************************************");
List <UserBean> listALLUserDetails = userdao.getAllUser();
req.setAttribute("listALLUserDetails", listALLUserDetails);
RequestDispatcher dispathcerServlet= req.getRequestDispatcher("/ShowDetails.jsp");
dispathcerServlet.forward(req, res);
}
}
hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<display-name>jsp-hibernate-curd</display-name>
<session-factory>
<property name="hbm2ddl.auto">update</property>
<property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="connection.url">jdbc:oracle:thin:#localhost:1521:xe</property>
<property name="connection.username">system</property>
<property name="connection.password">admin</property>
<property name="connection.pool_size">1</property>
<property name="current_session_context_class">thread</property>
<property name="show_sql">true</property>
<mapping class="org.com.bean.UserBean" />
</session-factory>
</hibernate-configuration>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<servlet>
<servlet-name>UserServlet</servlet-name>
<servlet-class>org.com.servlet.UserServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UserServlet</servlet-name>
<url-pattern>/user</url-pattern>
</servlet-mapping>
</web-app>

Make sure that you do not maintain more than one version of log4j in the classpath.
The TRACE level is available in the log4j jar of version 1.2.12 or higher..

hibernate mapping exception though i import import javax.persistence.Entity

I am trying to persist my java object to Mysql database. But i am facing the following error.
ClientDemo.java
package com.infybank;
import java.util.Scanner;
import org.hibernate.HibernateException;
public class ClientDemo {
public static void main(String args[])
{
CustomerDAO custdao=new CustomerDAO();
try
{
System.out.println("CREATE");
System.out.println("Enter the customer details");
Scanner sc=new Scanner(System.in);
System.out.println("Enter the customer number");
int d=sc.nextInt();
System.out.println("Enter the customer name");
String name=sc.next();
Customer cust=new Customer(d,name);
custdao.addCustomer(cust);
System.out.println("One recort inserted");
}
catch(HibernateException ex)
{
System.out.println("Exception "+ex);
}
}}`
HibernateUtil.java
package com.infybank;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static
{
try
{
Configuration configuration =new Configuration().configure("/config/hibernate.cfg.xml");
ServiceRegistry serviceRegistry=new StandardServiceRegistryBuilder()
.applySettings(configuration.getProperties()).build();
sessionFactory=configuration.buildSessionFactory(serviceRegistry);
}
catch(Throwable ex)
{
System.err.println("Initial sessionFactory creation failed"+ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory()
{
return sessionFactory;
}}
This is hibernate.cfg.xml file
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://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/hibernatedb</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">Anak#1604</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<mapping class="com.infybank.Customer"/>
</session-factory>
</hibernate-configuration>
Customer.java
package com.infybank;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="customer")
public class Customer {
#Id
#Column(name="CUSTOMERID")
private int customerId;
#Column(name="CUSTOMERNAME")
private String customerName;
public Customer(int id,String name)
{
this.customerId=id;
this.customerName=name;
}
public int getCustomerId() {
return customerId;
}
public void setCustomerId(int customerId) {
this.customerId = customerId;
}
public String getCustomerName() {
return customerName;
}
public void setCustomerName(String customerName) {
this.customerName = customerName;
}
}
CustomerDAO.java
package com.infybank;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class CustomerDAO implements ICustomer{
#Override
public void addCustomer(Customer cust) {
// TODO Auto-generated method stub
Session session=HibernateUtil.getSessionFactory().openSession();
Transaction tx=session.beginTransaction();
session.save(cust);
tx.commit();
session.close();
}
}
Error
Exception org.hibernate.MappingException: Unknown entity: com.infybank.Customer
Facing the above error when tried to run the code

At least Hibernate entities should not have this kind of constructor with arguments:
public Customer(int id,String name)
{
this.customerId=id;
this.customerName=name;
}
See this answer for more information.

By default all entity classes should have a default constructor. This is required by Hibernate due to the fact that they are instantiated via reflection.
I believe you just need to add an empty constructor to your Customer class and it should be fine
public Customer(){}

Enity is not mapped [select o from Type o]

I'm trying to create a small project with hibernate, but i got that error "Type is not mapped [select o from Type o]", I added mapping in hibernate.cfg.xml but still error.
Type.java:
package com.formation.gestionprojet.doa.entity;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="Type")
public class Type implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
#Id
private Long id;
private String name;
private String description;
private String active;
public Type() {
super();
// TODO Auto-generated constructor stub
}
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 getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getActive() {
return active;
}
public void setActive(String active) {
this.active = active;
}
}
hibernate.org.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- database connection setting -->
<property name ="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/gestion_projet?createDatabaseIfNotExist=true</property>
<property name="connection.username">root</property>
<property name= "connection.password">root</property>
<!-- Dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Disable the second level cache -->
<property name="cache.provider_class" >org.hibernate.cache.NoCacheProvider</property>
<!-- echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drope and re-create the database -->
<property name="hbm2ddl.auto">update</property>
<!-- mapping -->
<mapping class= "com.formation.gestionprojet.doa.entity.Type"/>
</session-factory>
</hibernate-configuration>
hibernateUtil.java:
package com.formation.gestionprojet.utils;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
#SuppressWarnings("deprecation")
public class HibernateUtil
{
private static SessionFactory sessionFactory;
private static ServiceRegistry serviceRegistry;
static
{
try
{
Configuration configuration = new Configuration();
configuration.configure("config/hibernate.cfg.xml");
serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
}
catch (HibernateException ex)
{
System.err.println("Error creating Session: " + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory()
{
return sessionFactory;
}
public static Session openSession()
{
return sessionFactory.openSession();
}
public static Session getCurrentSession()
{
return sessionFactory.getCurrentSession();
}
public static void close(){
if(sessionFactory!=null){
sessionFactory.close();
}
}
}
Test.Java
package com.formation.gestionprojet.utils;
import org.hibernate.Session;
public class Test {
static Session session = HibernateUtil.openSession();
public static void main(String[] args) {
session.createQuery("select o from Type o").list();
}
}

solved ! the problem was the version of hibernate that I used so I change it, a change in HibernateUtil.

org.hibernate.MappingException: Unknown entity - What is the root cause?

I am new to hibernate. i am following a tutorial and trying to execute a simple code but I am getting below error.
org.hibernate.MappingException: Unknown entity:
I am using annotations and configuration file also did exactly according the tutorials. I have googled but didn't get the correct answer
This is my code
package org.anne;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
public class Demo {
public static void main(String[] args) {
Paper p = new Paper();
p.setPname("indu");
SessionFactory sf = HibernateUtil.getSessionFactory();
Session ses = sf.openSession();
Transaction tr = ses.beginTransaction();
ses.save(p);
tr.commit();
ses.close();
sf.close();
}
}
package org.anne;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
static SessionFactory sf;
public static SessionFactory getSessionFactory()
{
Configuration cf = new Configuration();
cf.configure("hibernate.cfg.xml");
StandardServiceRegistryBuilder srv = new StandardServiceRegistryBuilder();
StandardServiceRegistry sr = srv.applySettings(cf.getProperties()).build();
sf = cf.buildSessionFactory(sr);
return sf;
}
}
package org.anne;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name = "PAPER")
public class Paper {
int pid;
String pname;
#Id
#Column(name = "PID")
#GeneratedValue(strategy = GenerationType.AUTO)
public int getPid() {
return pid;
}
public void setPid(int pid) {
this.pid = pid;
}
#Column(name = "PNAME")
public String getPname() {
return pname;
}
public void setPname(String pname) {
this.pname = pname;
}
}
<?xml version="1.0"?>
<!DOCTYPE hibernate-configuration SYSTEM "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd" >
<hibernate-configuration>
<session-factory>
<property name = "connection.driver_class">com.mysql.jdbc.Driver</property>
<property name = "connection.url">jdbc:mysql://localhost:3306/test</property>
<property name = "connection.username">root</property>
<property name = "connection.password">abc123</property>
<property name = "hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
<property name = "hibernate.show_sql">true</property>
<mapping class = "org.anne.Paper" />
</session-factory>
</hibernate-configuration>

If you boot Hibernate yourself, make sure to use the AnnotationConfiguration class instead of the Configuration class. Here is an example using the (legacy) HibernateUtil approach:
package hello;
import org.hibernate.*;
import org.hibernate.cfg.*;
import test.*;
import test.animals.Dog;
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {
sessionFactory = new AnnotationConfiguration()
.configure().buildSessionFactory();
} catch (Throwable ex) {
// Log exception!
throw new ExceptionInInitializerError(ex);
}
}
public static Session getSession()
throws HibernateException {
return sessionFactory.openSession();
}
}
More here https://docs.jboss.org/hibernate/stable/annotations/reference/en/html/ch01.html#setup-configuration

Table is not mapped - HIBERNATE

I have a problem trying to create a query from a Struts2 application with Hibernate and DB2 database. It throws me an Exception:
Struts Problem Report
Struts has detected an unhandled exception:
Messages:
ClienteCRM is not mapped
ClienteCRM is not mapped [FROM ClienteCRM WHERE nombre LIKE XXXX]
File: org/hibernate/hql/internal/ast/util/SessionFactoryHelper.java
Line number: 171
First of all this is my project tree:
I have this files:
Hibernate configuration file:
<hibernate-configuration>
<session-factory>
<property name="show_sql">true</property>
<property name="hibernate.connection.driver_class">com.ibm.as400.access.AS400JDBCDriver</property>
<property name="hibernate.connection.url">jdbc:as400://10.10.10.131/sugarcrmak </property>
<property name="hibernate.connection.username">user</property>
<property name="hibernate.connection.password">pwd</property>
<property name="hibernate.dialect">org.hibernate.dialect.DB2Dialect</property>
<mapping class="com.ak.exchange.model.dto.ClienteCRM" />
</session-factory>
Bean
package com.ak.exchange.model.dto;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
#Entity
#Table(name="accounts")
//#NamedQuery(name="ClienteCRM.buscarPorNombre", query="from ClienteCRM c where c.nombre like :nombre")
public class ClienteCRM implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
#Id
#Column(name="id")
private String id;
#Column(name="name")
private String nombre;
public ClienteCRM(){
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getNombre() {
return nombre;
}
public void setNombre(String nombre) {
this.nombre = nombre;
}
}
DAO layer for ClienteCRM
package com.ak.exchange.model.dao;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import com.ak.exchange.model.dto.ClienteCRM;
public class ClienteDAO {
protected Session session;
protected void openSession(){
Configuration configuration = new Configuration().configure();
StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties());
SessionFactory sessionFactory = configuration.buildSessionFactory(builder.build());
session = sessionFactory.openSession();
}
protected void closeSession(){
session.close();
}
public List<ClienteCRM> buscarClientesCRMPorNombre (String aNombre){
this.openSession();
session.beginTransaction();
// Query query = session.getNamedQuery("ClienteCRM.buscarPorNombre");
// query.setParameter("nombre", "%" + aNombre + "%");
Query selectAll = session.createQuery("FROM ClienteCRM WHERE nombre LIKE " + aNombre);
#SuppressWarnings("unchecked")
List<ClienteCRM> tmpClientes = (List<ClienteCRM>) selectAll.list();
this.closeSession();
return tmpClientes;
}
}
As you can see, I've tried to create a query by using a NamedQuery (commented) and also creating from the DAO.
Any idea?
Thanks a lot

Put your hibernate.cfg.xml inside src/main/resources
Put your mapping files inside src/main/resources
Map your files like this:
<mapping resource="ClienteCRM.hbm.xml" />
It should work.