O Relatório Não Aparece?

public class Relatorio {
    

    public Relatorio() {
    try {
		abreRelatorio();
	} catch (JRException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (Exception e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
    
    }
    
    

    public void abreRelatorio() throws JRException, Exception{

       
        Map parameters = new HashMap( );
//        parameters.put("DATA_INICIAL",dataInicial);
//        parameters.put("DATA_FINAL",dataFinal);
        parameters.put("Nome", new String());
        String path = "C:/Documents and Settings/Desenvolvimento/Desktop/Relatorio.jasper";
        System.out.println("Teste de jsp");
        File file = new File(path);
        file = file.getAbsoluteFile( );

        String repStr2 = file.getPath( );

        try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
 
 			String url = "jdbc:odbc:academico";
 			String userName = "sa";
 			String password = "154264";
 
 			String query = "SELECT * FROM Aluno";
 
 			Connection  con= DriverManager.getConnection(url, userName, password);
 
 		Statement statement = con.createStatement();
 
 		ResultSet	resultSet = statement.executeQuery(query);
            JasperFillManager.fillReportToFile( repStr2, parameters, con );
            JasperPrint jasperPrint = JasperFillManager.fillReport(repStr2,parameters,con);
            JasperViewer viewer = new JasperViewer(jasperPrint, true);
          
            
        }
        catch(JRException jex){
            jex.getMessage( );
        }
        catch(Exception ex){
            ex.getStackTrace( );
        }
    }
    
    public static void main(String[] args) throws JRException, Exception{
        

         Relatorio rel=new Relatorio();
         rel.abreRelatorio();
    }
     
}