Erro ao tentar exibir um .jasper

Pessoal, estou tentando exibir um relatório feito no ireports, só que o programa está me resultado a seguinte mensagem de erro:

java.lang.NoClassDefFoundError: org/apache/commons/collections/ArrayStack
at org.apache.commons.digester.Digester.<init>(Digester.java:185)
at dori.jasper.engine.xml.JRXmlDigester.<init>(JRXmlDigester.java:115)
at dori.jasper.engine.xml.JRXmlLoader.prepareDigester(JRXmlLoader.java:446)
at dori.jasper.engine.xml.JRXmlLoader.loadXML(JRXmlLoader.java:384)
at dori.jasper.engine.xml.JRXmlLoader.load(JRXmlLoader.java:371)
at dori.jasper.engine.xml.JRXmlLoader.load(JRXmlLoader.java:339)
at dori.jasper.engine.xml.JRXmlLoader.load(JRXmlLoader.java:323)
at dori.jasper.engine.JasperManager.loadXmlDesign(JasperManager.java:1017)
at beans.Relatorio.<init>(Relatorio.java:28)
at beans.Relatorio.main(Relatorio.java:51)
Exception in thread “main”


Ao meu ver…parece que está faltando a lib commons/collections a qual contei o ArrayStack…gostaria de alguma luz…


A classe é a seguinte:
package beans;

import dori.jasper.engine.;
import dori.jasper.engine.design.
;
import dori.jasper.engine.print.;
import dori.jasper.view.
;
import java.io.*;

public class Relatorio {

/** Creates a new instance of relatorio */
public Relatorio() {

try {
System.setProperty(“org.xml.sax.driver”, “org.apache.xerces.parsers.SAXParser”);

// First, load JasperDesign from XML and compile it into JasperReport
File reportFile = new File(“c:\empresas.jasper”);

//JasperDesign jasperDesign = JasperManager.loadXmlDesign(“c:\empresas.jasper”);
JasperDesign jasperDesign = JasperManager.loadXmlDesign(reportFile.getPath());
JasperReport jasperReport = JasperManager.compileReport(jasperDesign);

// Third, get a database connection
Class.forName(“org.firebirdsql.jdbc.FBDriver”).newInstance();
java.sql.Connection conn = java.sql.DriverManager.getConnection(“jdbc:firebirdsql:localhost/3050:D:\Sistemas_Junior\CEBRAPA_7\Dados\CEBRAPA.GDB?lc_ctype=WIN1252”,“SYSDBA”,“masterkey”);

// Fourth, create JasperPrint using fillReport() method
JasperPrint jasperPrint = JasperManager.fillReport(jasperReport,null,conn);

// Or to view report in the JasperViewer
JasperViewer.viewReport(jasperPrint);

}catch (Exception e){ e.printStackTrace();}
}

/**

  • @param args the command line arguments
    */
    public static void main(String[] args) {

Relatorio a = new Relatorio();
}

}