[Java]Write Excel File Using Apache POI API

package com.file.properties;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Hashtable;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

class WriteExcel {
	@SuppressWarnings("rawtypes")
	static void saveToExcelFile(File writeFile,Hashtable table) {
        try {
           // write data to Excel file
            XSSFWorkbook wb;
            XSSFSheet sheet;
            XSSFRow row;
            XSSFCell cell;
            int rowIndex = 0;
 
            if (writeFile.exists()) {
                InputStream excelFile = new FileInputStream(writeFile);
                wb = new XSSFWorkbook(excelFile);
                sheet = wb.getSheetAt(0);
                rowIndex = sheet.getLastRowNum();
                rowIndex += 1;
 
                row = sheet.createRow(rowIndex);
            }
            else {
                wb = new XSSFWorkbook();
                sheet = wb.createSheet();
                row = sheet.createRow(0);
                cell = row.createCell(0);
                cell.setCellValue("URL");
                cell = row.createCell(1);
                cell.setCellValue("PageRank");
                cell = row.createCell(2);
                cell.setCellValue("AlexaRank");
 
                row = sheet.createRow(1);
            }
 
            CellStyle cs = wb.createCellStyle();
            cs.setFillForegroundColor(HSSFColor.GREEN.index);
            cs.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
 
            cell = row.createCell(0);
            cell.setCellValue(table.get("URL").toString());
            cell = row.createCell(1);
            if (Integer.parseInt(table.get("PageRank").toString()) >= 5)
                cell.setCellStyle(cs);
            cell.setCellValue(table.get("PageRank").toString());
            cell = row.createCell(2);
            cell.setCellValue(table.get("AlexaRank").toString());
 
            FileOutputStream out = new FileOutputStream(writeFile);
            wb.write(out);
            out.flush();
            out.close();
        }
        catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

	/**
	 * @param args
	 */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public static void main(String[] args) {
		// TODO Auto-generated method stub
	     File writeFile = new File("D:\\SoapUIStudy\\writeExcel.xlsx");
	     Hashtable table = new Hashtable();
	     table.put("URL","http:\\cn.bing.com");
	     table.put("PageRank","5");
	     table.put("AlexaRank","13658988546");
	     saveToExcelFile(writeFile,table);
	}

}