Hibernate + JAVA

Tem como colar seu código aqui?

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
  <persistence-unit name="DeliveryPU" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
      <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/bd_delivery"/>
      <property name="javax.persistence.jdbc.user" value="root"/>
      <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
      <property name="javax.persistence.jdbc.password" value="root"/>
      <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider"/>
      <property name="javax.persistence.schema-generation.database.action" value="create"/>
    </properties>
  </persistence-unit>
</persistence>

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package net.g3infotech.delivery.dao;

import java.io.Serializable;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.Query;
import net.g3infotech.delivery.util.DeliveryUtil;

/**
 *
 * @author G3
 */
public class GenericDAO<T extends Serializable> {

    private Class<T> aClass;

    protected GenericDAO(Class<T> aClass){
        this.aClass = aClass;
    }

    public long count(String jpql, Object... params){
        EntityManager entityManager = getEntityManager();
        entityManager.getTransaction().begin();
        Query q = entityManager.createQuery(jpql);
        for(int i = 0; i < params.length; i++){
            q.setParameter(i+1, params[i]);
        }
        long valor = (long) q.getSingleResult();
        entityManager.getTransaction().commit();
        entityManager.close();
        return valor;
    }

    protected EntityManager getEntityManager(){
        return DeliveryUtil.getInstance().getEntityManager();
    }

    public void save(T entity){
        EntityManager entityManager = getEntityManager();
        entityManager.getTransaction().begin();
        entityManager.persist(entity);
        entityManager.getTransaction().commit();
        entityManager.close();
    }

    public void update(T entity){
        EntityManager entityManager = getEntityManager();
        entityManager.getTransaction().begin();
        entityManager.merge(entity);
        entityManager.getTransaction().commit();
        entityManager.close();
    }

    public void delete(Integer id){
        EntityManager manager = getEntityManager();
        manager.getTransaction().begin();
        manager.remove(manager.getReference(aClass, id));
        manager.getTransaction().commit();
        manager.close();
    }

    public List<T> findAll(){
        EntityManager entityManager = getEntityManager();
        entityManager.getTransaction().begin();
        Query q = entityManager.createQuery("from "+aClass.getSimpleName());
        List<T> entities = q.getResultList();
        entityManager.getTransaction().commit();
        entityManager.close();
        return entities;
    }

    public List<T> find(String jpql, Object... params){
        EntityManager entityManager = getEntityManager();
        entityManager.getTransaction().begin();
        Query q = entityManager.createQuery(jpql);
        for(int i = 0; i<params.length; i++){
            q.setParameter(i+1, params[i]);
        }
        List<T> entities = q.getResultList();
        entityManager.getTransaction().commit();
        entityManager.close();
        return entities;
    }

    public List<T> find(String jpql){
        EntityManager entityManager = getEntityManager();
        entityManager.getTransaction().begin();
        Query q = entityManager.createQuery(jpql);
        List<T> entities = q.getResultList();
        entityManager.getTransaction().commit();
        entityManager.close();
        return entities;
    }

    @SuppressWarnings("unchecked")
    public T findOne(String jpql, Object... params){
        EntityManager entityManager = getEntityManager();
        entityManager.getTransaction().begin();
        Query q = entityManager.createQuery(jpql);
        for(int i = 0; i < params.length; i++){
            q.setParameter(i+1, params[i]);
        }
        T entity = (T) q.getSingleResult();
        entityManager.getTransaction().commit();
        entityManager.close();
        return entity;
    }

    public T findOne(String jpql){
        EntityManager entityManager = getEntityManager();
        entityManager.getTransaction().begin();
        Query q = entityManager.createQuery(jpql);
        T entities = (T) q.getSingleResult();
        entityManager.getTransaction().commit();
        entityManager.close();
        return entities;
    }

}

public class MesaDAO extends GenericDAO<Mesa>{

    public MesaDAO() {
        super(Mesa.class);
    }

}

@Entity
@Table(name = "TB_MESA")
public class Mesa implements Serializable{

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID_MESA")
    private int idMesa;

    @Column(name = "STATUS")
    private int status; //ocupada ou não

    @Column(name = "DESCRICAO_MESA")
    private String descricaoMesa;

    public int getIdMesa() {
        return idMesa;
    }

    public void setIdMesa(int idMesa) {
        this.idMesa = idMesa;
    }

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public String getDescricaoMesa() {
        return descricaoMesa;
    }

    public void setDescricaoMesa(String descricaoMesa) {
        this.descricaoMesa = descricaoMesa;
    }

    @Override
    public int hashCode() {
        int hash = 7;
        return hash;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Mesa other = (Mesa) obj;
        if (this.idMesa != other.idMesa) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "Mesa{" + "idMesa=" + idMesa + ", status=" + status + ", descricaoMesa=" + descricaoMesa + '}';
    }

}

public class DeliveryUtil {

    private EntityManagerFactory factory;
    private static DeliveryUtil instance;

    private DeliveryUtil(){
        this.factory = Persistence.createEntityManagerFactory("DeliveryPU");
    }

    public static synchronized DeliveryUtil getInstance(){
        if(instance == null){
            instance = new DeliveryUtil();
        }
        return instance;
    }

    public EntityManager getEntityManager(){
        return factory.createEntityManager();
    }

}

Opa pessoal, já consegui resolver..

Era um jar que eu tinha colocado duas versões.

javassist.. Tinha a 3.1 e a 3.2

kkkkkkkkkkkk Provavelmente por conta do horário na madrugada não percebi.. Muito obrigado pela atenção!