如何在 Apache POI XSSF Excel 中使用不在 IndexedColors 中的颜色？

Question

I am looking at an excel sheet that I am wanting to duplicate and the only issue I am having is with colors. The colors I am looking to duplicate are Blue, Accent 5, Lighter 40% and Light Green from the Standard Colors section. I am looking at the docs for using custom colors in an XSSF Workbook and it states that the way to do it is like this:

XSSFWorkbook wb = new XSSFWorkbook();
XSSFSheet sheet = wb.createSheet();
XSSFRow row = sheet.createRow(0);
XSSFCell cell = row.createCell(0);
cell.setCellValue("custom XSSF colors");

XSSFCellStyle style1 = wb.createCellStyle();
style1.setFillForegroundColor(new XSSFColor(new java.awt.Color(128, 0, 128), new DefaultIndexedColorMap()));
style1.setFillPattern(FillPatternType.SOLID_FOREGROUND);

When I try to use style1.setFillForegroundColor(new XSSFColor(new java.awt.Color(128, 0, 128), new DefaultIndexedColorMap())); I get an error, since the only parameter that .setFillForegroundColor() only takes one parameter, and that is a short and not an XSSFColor .

Has anyone had any luck with this? I have been searching for hours and can't find anything that isn't 8 years old or doesn't work.

Answer 1

Using current apache poi 4.1.1 there is public void setFillForegroundColor(XSSFColor color) in XSSFCellStyle .

The XSSFColor should be created using constructor public XSSFColor(byte[] rgb, IndexedColorMap colorMap) since all other constructors are either deprecated or marked TEST ONLY or not usable for creating a custom color.

The RGB values for the needed color can be got from Excel by setting the color from the palette and then choose Fill Color - More Colors - Custom . Unfortunately apache poi 's IndexedColors are no more exact the colors of current Excel versions. They are of version 2007 . So they also can be used but later Excel versions might show different colors then.

Complete example using current apache poi 4.1.1 :

import java.io.FileOutputStream;

import org.apache.poi.ss.usermodel.*;

import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.DefaultIndexedColorMap;

public class CreateExcelXSSFCellFillColor {

 public static void main(String[] args) throws Exception {
  XSSFWorkbook workbook = new XSSFWorkbook();

  java.util.List<XSSFCellStyle> cellStyles = new java.util.ArrayList<XSSFCellStyle>();
  XSSFCellStyle cellStyle; byte[] rgb; XSSFColor color;

  //Your custom color #800080
  //create cell style on workbook level
  cellStyle = workbook.createCellStyle();
  //set pattern fill settings
  cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
  //create the RGB byte array
  rgb = new byte[3];
  rgb[0] = (byte) 128; // red
  rgb[1] = (byte) 0; // green
  rgb[2] = (byte) 128; // blue
  //create XSSFColor
  color = new XSSFColor(rgb, new DefaultIndexedColorMap());
  //set fill color to cell style
  cellStyle.setFillForegroundColor(color);

  cellStyles.add(cellStyle);

  //Light Green
  cellStyle = workbook.createCellStyle();
  cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
  rgb = new byte[3];
  rgb[0] = (byte) 146; // red
  rgb[1] = (byte) 208; // green
  rgb[2] = (byte) 80; // blue
  color = new XSSFColor(rgb, new DefaultIndexedColorMap());
  cellStyle.setFillForegroundColor(color);
  cellStyles.add(cellStyle);

  //Blue, Accent 5, Lighter 40%
  cellStyle = workbook.createCellStyle();
  cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
  rgb = new byte[3];
  rgb[0] = (byte) 155; // red
  rgb[1] = (byte) 194; // green
  rgb[2] = (byte) 230; // blue
  color = new XSSFColor(rgb, new DefaultIndexedColorMap());
  cellStyle.setFillForegroundColor(color);
  cellStyles.add(cellStyle);

  Sheet sheet = workbook.createSheet();
  for (int r = 0; r < cellStyles.size(); r++) {
   Row row = sheet.createRow(r);
   row.setHeight((short)(20*20));
   Cell cell = row.createCell(0);
   cell.setCellValue("cell style " + (r+1));
   cell.setCellStyle(cellStyles.get(r));
  }
  sheet.setColumnWidth(0, 20*256);

  FileOutputStream out = new FileOutputStream("CreateExcelXSSFCellFillColor.xlsx");
  workbook.write(out);
  out.close();
  workbook.close();
 }
}