FileWriter writer = null;
if(filePath.endsWith("csv")){
writer = new CSVWriter(data, result, outputFile);
}
if(filePath.endsWith("xls")){
writer = new XLSWriter(data, result, outputFile);
}
if(filePath.endsWith("wss")){
writer = new WSSWriter(data, result, outputFile);
}
if(filePath.endsWith("pdf")){