Começar com Hibernate ou JDBC puro?

package negocio.pessoas;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.JOptionPane;

/**
 *
 * @author PC
 */
public class Epi {
    
    // Declaração de Variáveis
    private conexao.Util util;
    private Connection conn;
    private Statement stmt;
    private ResultSet rsEpi;
    private ResultSet rsEntEpi;
    
    /** Creates a new instance of Epi */
    public Epi()
    {
        if (util == null)
            util = conexao.Util.getInstance();
        if (conn == null)
            conn = util.getConexao();
    }
    
    public boolean cadastrarEPI(String pNomeEpi, String pDescEpi, String pNca, String pValCa, int pVUtil, String pTVutil)
    {
        boolean status = false;
        try
        {
            stmt = conn.createStatement(ResultSet.FETCH_UNKNOWN,ResultSet.TYPE_SCROLL_INSENSITIVE);
            String sql = "insert into epi values (nextval('seq_codepi'),'"+pNomeEpi+"','"+pDescEpi+"','"+pNca+"','"+pValCa+"',"+pVUtil+",'"+pTVutil+"')";
            stmt.execute(sql);
            status=true;
        }
        catch (Exception e)
        {
            JOptionPane.showMessageDialog(null,e.getMessage(),"Erro",0);
            status = false;
        }
        return(status);
    }
    
    public boolean cadastrarEntEPI(int pCodCol, String pNomeEpi, String pDescEpi, String pNca, String pValCa, int pVUtil, String pTVutil, String pDtEnt, String pDtProxEnt)
    {
        boolean status = false;
        try
        {
            String insEntEpi = "insert into entEpi values (nextval('seq_codentepi'), "+pCodCol+",'"+pNomeEpi+"','"+pDescEpi+"','"+pNca+"','"+pValCa+"',"+pVUtil+",'"+pTVutil+"','"+pDtEnt+"','"+pDtProxEnt+"')";
            stmt = conn.createStatement(ResultSet.FETCH_UNKNOWN,ResultSet.TYPE_SCROLL_INSENSITIVE);
            stmt.execute(insEntEpi);
            status=true;
        }
        catch (Exception e)
        {
            JOptionPane.showMessageDialog(null,e.getMessage(),"Erro",0);
            status = false;
        }
        return(status);
    }
    
    public boolean atualizarEPI(String pNomeEpi, String pDescEpi, String pNca, String pValCa, int pVUtil, String pTVutil, int pCodEpi)
    {
        boolean status = false;
        try
        {
            String sql = "update epi set nomeEpi='"+pNomeEpi+"',descepi='"+pDescEpi+"', ncaepi='"+pNca+"', valcaepi='"+pValCa+"', vutilepi="+pVUtil+", tipovutilepi='"+pTVutil+"' where codepi ="+pCodEpi+"";
            stmt = conn.createStatement(ResultSet.FETCH_UNKNOWN,ResultSet.TYPE_SCROLL_INSENSITIVE);
            stmt.executeUpdate(sql);
            status=true;
        }
        catch (SQLException e)
        {
            JOptionPane.showMessageDialog(null,e.getMessage(),"Erro",0);
            e.printStackTrace();
            status = false;
        }
        return (status);
    }
    
    public ResultSet consultarTodos()
    {
        rsEpi = null;
        try
        {
            String sql = "select * from epi order by nomeEpi";
            stmt = conn.createStatement(ResultSet.FETCH_UNKNOWN,ResultSet.TYPE_SCROLL_INSENSITIVE);
            rsEpi = stmt.executeQuery(sql);
        }
        catch (Exception e)
        {
            JOptionPane.showMessageDialog(null,e.getMessage(),"Erro",0);
            e.printStackTrace();
        }
        return(rsEpi);
    }
    
    public ResultSet consultarEntEpi(int pCodCol)
    {
        rsEntEpi = null;
        try
        {
            String consEntEpi = "select * from entEpi where codColEntEpi="+pCodCol+" order by dtEntEpi";
            stmt = conn.createStatement(ResultSet.FETCH_UNKNOWN,ResultSet.TYPE_SCROLL_INSENSITIVE);
            rsEntEpi = stmt.executeQuery(consEntEpi);
        }
        catch (Exception e)
        {
            JOptionPane.showMessageDialog(null,e.getMessage(),"Erro",0);
            e.printStackTrace();
        }
        return(rsEntEpi);
    }
    
    public boolean excluirEpi(String pNomeEpi)
    {
        boolean status = false;
        try
        {
            String delEpi = "delete from epi where nomeEpi ='"+pNomeEpi+"'";
            stmt = conn.createStatement(ResultSet.FETCH_UNKNOWN,ResultSet.TYPE_SCROLL_INSENSITIVE);
            stmt.execute(delEpi);
            status = true;
        }
        catch (Exception e)
        {
            JOptionPane.showMessageDialog(null,e.getMessage(),"Erro",0);
            e.printStackTrace();
            status = false;
        }
        return (status);
    }
    
    public void closeStmt() throws SQLException
    {
        if (stmt == null)
        {}
        else
            stmt.close();
    }
    
    public void closeRsEpi() throws SQLException
    {
        if (rsEpi == null)
        {}
        else
            rsEpi.close();
    }
    
    public void closeRsEntEpi() throws SQLException
    {
        if (rsEntEpi == null)
        {}
        else
            rsEntEpi.close();
    }    
            
}