dao + bean + java desktop

[preda 0]

Galera,

 

Segue os arquivos que me foram passados:

 

UsuarioDao.java

package br.univap.fcsac.pi2.dao;

import br.univap.fcsac.pi2.bean.Usuario;
import br.univap.fcsac.pi2.hibernate.HibernateUtil;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Order;

public class UsuarioDao {

	private DaoGenerico<Usuario> daoEspecifico;
	private Session session;

	public UsuarioDao() {
		this.daoEspecifico = new DaoGenerico<Usuario>(Usuario.class, session);
		this.session = HibernateUtil.openSession();
	}

	public UsuarioDao(Session session) {
		this.daoEspecifico = new DaoGenerico<Usuario>(Usuario.class, session);
		this.session = session;
	}

	public void saveOrUpdate(Usuario c) {
		Transaction t = session.beginTransaction();
		session.saveOrUpdate(c);
		t.commit();
	}

	public Usuario load(Long id) {
		return (Usuario) session.load(Usuario.class, id);
	}

	public Usuario get(Integer id) {
		return (Usuario) session.get(Usuario.class, id);
	}

	public void delete(Usuario c) {
		Transaction t = session.beginTransaction();
		session.delete(c);
		t.commit();
	}

	public List<Usuario> listAll() {
		Criteria c = session.createCriteria(Usuario.class);
		c.addOrder(Order.asc("id"));
		return c.list();
	}

	public void close() {
		this.session.close();
	}
}

Usuario.java

package br.univap.fcsac.pi2.bean;

import java.io.Serializable;
import java.util.Collection;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;


@Entity
@Table(name = "usuario", catalog = "aulaMySQL", schema = "")
@NamedQueries({@NamedQuery(name = "Usuario.findAll", query = "SELECT u FROM Usuario u"), @NamedQuery(name = "Usuario.findById", query = "SELECT u FROM Usuario u WHERE u.id = :id"), @NamedQuery(name = "Usuario.findByNome", query = "SELECT u FROM Usuario u WHERE u.nome = :nome")})
public class Usuario implements Serializable {
	private static final long serialVersionUID = 1L;
	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	@Basic(optional = false)
	@Column(name = "id", nullable = false)
	private Integer id;
	@Column(name = "nome", length = 50)
	private String nome;
	@OneToMany(mappedBy = "usuario")
	private Collection<Materia> materiaCollection;

	public Usuario() {
	}

	public Usuario(Integer id) {
		this.id = id;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getNome() {
		return nome;
	}

	public void setNome(String nome) {
		this.nome = nome;
	}

	public Collection<Materia> getMateriaCollection() {
		return materiaCollection;
	}

	public void setMateriaCollection(Collection<Materia> materiaCollection) {
		this.materiaCollection = materiaCollection;
	}

	@Override
	public int hashCode() {
		int hash = 0;
		hash += (id != null ? id.hashCode() : 0);
		return hash;
	}

	@Override
	public boolean equals(Object object) {
		// TODO: Warning - this method won't work in the case the id fields are not set
		if (!(object instanceof Usuario)) {
			return false;
		}
		Usuario other = (Usuario) object;
		if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
			return false;
		}
		return true;
	}

	@Override
	public String toString() {
		return "br.univap.fcsac.pi2.bean.Usuario[id=" + id + "]";
	}

}

DaoGenerico.java

package br.univap.fcsac.pi2.dao;

import java.io.Serializable;
import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.criterion.Order;

public class DaoGenerico<Clazz> {

	private Class<Clazz> persistentClass;
	private Session session;

	/**
	 * Construtor
	 * 
	 * @param  Class<Clazz> persistentClass
	 * @param  Session session
	 */
	public DaoGenerico(Class<Clazz> persistentClass, Session session) {
		this.persistentClass = persistentClass;
		this.session = session;
	}

	/**
	 * Consulta uma Linha da Tabela Genérica usando get
	 *
	 * @param  Serializable id
	 * @return Clazz
	 */
	@SuppressWarnings("unchecked")
	public Clazz get(Serializable id) {
		return (Clazz) session.get(persistentClass, id);
	}

	/**
	 * Consulta uma Linha da Tabela Genérica usando load
	 *
	 * @param  Serializable id
	 * @return Clazz
	 */
	@SuppressWarnings("unchecked")
	public Clazz load(Serializable id) {
		return (Clazz) session.load(persistentClass, id);
	}

	/**
	 * Salva ou Atualiza Dados na Tabela Genérica
	 *
	 * @param  Clazz
	 */
	public void saveOrUpdate(Clazz c) {
		session.saveOrUpdate(c);
	}

	/**
	 * Deleta Dados na Tabela Genérica
	 *
	 * @param  Clazz
	 */
	public void delete(Clazz c) {
		session.delete(c);
	}

	/**
	 * Consulta Todas Linhas de uma Tabela Genérica em ordem crescente
	 *
	 * @return List<Clazz>
	 */
	public List<Clazz> listaAllIdCrescente() {
		Criteria c = session.createCriteria(persistentClass);
		c.addOrder(Order.asc("id"));
		return c.list();
	}

	/**
	 * Consulta Todas Linhas de uma Tabela Genérica em ordem decrescente
	 *
	 * @return List<Clazz>
	 */
	public List<Clazz> listaAllIdDecrescente() {
		Criteria c = session.createCriteria(persistentClass);
		c.addOrder(Order.desc("id"));
		return c.list();
	}

	/**
	 * Encerra a conexão da session
	 *
	 */
	public void close(){
		this.session.close();
	}

}

 

package br.univap.fcsac.pi2.teste;

import br.univap.fcsac.pi2.bean.Usuario;
import br.univap.fcsac.pi2.dao.UsuarioDao;
import java.util.List;

public class UsuarioTeste {
public static void main(String[] args){

		System.out.println("teste");
		System.out.println("-----------------------------");

		//criando o objeto
				Usuario t = new Usuario();
		t.setNome("Aluno 1");
	


		UsuarioDao dao = new UsuarioDao();

		//incluir
		dao.saveOrUpdate(t);

		//listar
		List<Usuario> lista = dao.listAll();
		for (Usuario i : lista ){
			System.out.println(" Id   : "+i.getId());
			System.out.println(" Nome : "+i.getNome());
		}


	}
}

 

Como faço para alterar e excluir um usuário ?

 

Grato,

[Giovanni Ritchie 0]

Tenha DO... poste apenas o necessário por favor...

 

Repare na classe DAOGenerico tem um metodo delete, é soh usar ele.