Multiple Styles to Excel Cell POI

Question

I want to apply colour to cell as well as Format Cell value(e.g. Date,Amount).But when I am applying two Cell Style only the last style is gets applied on cell.

Answer 1

You can create a map of styles and then you can use different styles throughout the java program.

For example

Map cellStyles = new HashMap();
DataFormat dataFormat = workbook.createDataFormat();

XSSFCellStyle cellStyle;
XSSFFont font;

cellStyle = workbook.createCellStyle();

cellStyle.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
cellStyle.setAlignment(cellStyle.ALIGN_CENTER_SELECTION);   
font = workbook.createFont();
font.setFontHeightInPoints((short)16);
font.setFontName("Calibri");                                            
cellStyle.setFont(font);
cellStyles.put("header_cell_style", cellStyle);

cellStyle = workbook.createCellStyle(); 
cellStyle.setAlignment(cellStyle.ALIGN_CENTER_SELECTION);
font = workbook.createFont();
font.setFontHeightInPoints((short)12);
font.setFontName("Calibri");                   
cellStyle.setFont(font);
cellStyles.put("normal_cell_style", cellStyle);

cellStyle = workbook.createCellStyle();
cellStyle.setAlignment(cellStyle.ALIGN_CENTER_SELECTION);       
cellStyle.setDataFormat(dataFormat.getFormat("dd-mmm-yyyy"));
font = workbook.createFont();
font.setFontHeightInPoints((short)12);
font.setFontName("Calibri");                   
cellStyle.setFont(font);
cellStyles.put("date_cell_style", cellStyle);

cellStyle = workbook.createCellStyle();
cellStyle.setAlignment(cellStyle.ALIGN_CENTER_SELECTION);       
cellStyle.setDataFormat(dataFormat.getFormat("dd-mmm-yyyy"));
font = workbook.createFont();
font.setFontHeightInPoints((short)16);
font.setFontName("Calibri");                   
cellStyle.setFont(font);
cellStyles.put("header_date_cell_style", cellStyle);

return cellStyles;       

and then use this map like

Map multipleCellStyles = createMultipleExcelCellStyles(workbook);

headerCellD1.setCellStyle(multipleCellStyles.get("header_cell_style"));

cellB.setCellStyle(multipleCellStyles.get("normal_cell_style"));

cellC.setCellStyle(multipleCellStyles.get("date_cell_style"));