[Resolvido]problema para gerar relatório no Ireport

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
        at net.sf.jasperreports.engine.util.JRLoader.<clinit>(JRLoader.java:60)
        at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:243)
        at br.com.proap.view.FuncionarioView.jButton1ActionPerformed(FuncionarioView.java:491)
        at br.com.proap.view.FuncionarioView.access$900(FuncionarioView.java:33)

package br.com.proap.view;

import java.sql.Connection;
import java.sql.DriverManager;

public class Conexao {

    public Connection getConnection(){

  try{
    Class.forName("com.mysql.jdbc.Driver").newInstance();
    String driver = "jdbc:mysql://localhost:3306/Cliente";
    Connection con = DriverManager.getConnection(driver,"root","01234");
    return con;
  }
    catch(Exception e){
    e.printStackTrace();
     }
   return null;
  }
}

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
     try{
       Connection con = new Conexao().getConnection();
       HashMap parametros = new HashMap();
       JasperPrint jp = JasperFillManager.fillReport("./Relatorio.jasper", parametros,con);
       JasperViewer.viewReport(jp);
     }
     catch(Exception erro){
         JOptionPane.showMessageDialog(null,"deu erro ="+erro);
     }
    }