Foreground downloads data stored in excel

@RequestMapping ( "/ download.do") 
public void downloads (years String, String months, the HttpServletResponse Response) throws IOException { 
    //System.out.println(years+"-"+months); 
    List <the ProductList> = adminservice Products. findProductByDate (years, months); // query to place the result in no instance of a class ProductList, getter and setter query to the value 
    String fileName = years + "of" + months + "list of monthly sales"; 
    String = sheetName months + "January sales list"; 
    String TITLENAME years + = "on" + months + "list of monthly sales"; 
    String [] = {columeName "trade name", "sales of goods"}; 
    String [] [] = new new String the Comment [products.size ()] [2]; 
    for (int I = 0; I <products.size (); I ++) { 
            Comment [I] [0] = products.get (I) .getName ();
            comment[i][1]= String.valueOf(products.get(i).getTotalnum());
    } 
    // Create excel file 
    HSSFWorkbook new new HSSFWorkbook hwb = (); 
    // Create a sheet in the script hwb 
    HSSFSheet = hwb.createSheet sheet (sheetName); 
    // Create a first row 
    HSSFRow ROW1 = sheet.createRow (0); 
    / / create the first cell of the first row of the grid 
    HSSFCell cell row1.createCell = (0); 
    // the merged cell 
    sheet.addMergedRegion (new new CellRangeAddress (0,0,0,1)); 
    cell.setCellValue (TITLENAME); 
    // Create the second row 
    HSSFRow ROW2 sheet.createRow = (. 1); 
    // to two cells in the second row assignment 
    for (int I = 0; I <2; I ++) { 
        row2.createCell (I) .setCellValue (columeName [I]); 
    } 
    // Create a data line 
    for (int I = 0; I <comment.length; I ++) { 
        ROW2 sheet.createRow = (I + 2);
        for(int j=0;j<2;j++){
            row2.createCell(j).setCellValue(comment[i][j]);
        }
    }
    String filename=fileName+".xls";
    response.setContentType("application/ms-excel;charset=UTF-8");
    response.setHeader("content-Disposition","attachment;filename="+filename);
    OutputStream out =response.getOutputStream();
    hwb.write(out);
}