Clean Insert with excel file

// Clean Insert data
IDataSet dataSet = getDataSet("ExecuteNormal1.xls");
DatabaseOperation.CLEAN_INSERT.execute(connection, dataSet);

// Getting expected data ( ExecuteNormal2-Expected.xls )
IDataSet expected = getDataSet("ExecuteNormal2-Expected.xls");
ITable expectedTable = expected.getTable("ExpectedTable1.xls");

    /**
     * getting Dataset from .xls file.
     * 
     * @param fileName Excel File Name
     * 
     * @return Dataset for DBunit.
     */
    private IDataSet getDataSet(String fileName){  
  IDataSet dataSet = null;  
  try {
            dataSet = new XlsDataSet(this.getClass().getResourceAsStream(TESTDATA_PATH + fileName));
  } catch (Throwable ex) {
            ex.printStackTrace();
   fail("getDataSet thrown exception : " + ex.getMessage());
  }  
  return dataSet;
 }