POI 将单元格背景设置为自定义颜色

java excel-2003 apache-poi

2022-09-01 03:42:18

我想为单元格的背景设置自定义颜色。
我使用（不能使用其他任何东西）。HSSFWorkbook

HSSFPalette palette = aWorkBook.getCustomPalette();             
Color col = new Color(backgroundColor);                     
HSSFColor myColor  = palette.addColor((byte) 10, (byte) 11, (byte) 12);

我收到此错误：java.lang.RuntimeException: Could not find free color index

答案 1

您收到此错误是因为托盘已满。您需要做的是覆盖预设颜色。以下是我正在使用的函数示例：

public HSSFColor setColor(HSSFWorkbook workbook, byte r,byte g, byte b){
    HSSFPalette palette = workbook.getCustomPalette();
    HSSFColor hssfColor = null;
    try {
        hssfColor= palette.findColor(r, g, b); 
        if (hssfColor == null ){
            palette.setColorAtIndex(HSSFColor.LAVENDER.index, r, g,b);
            hssfColor = palette.getColor(HSSFColor.LAVENDER.index);
        }
    } catch (Exception e) {
        logger.error(e);
    }

    return hssfColor;
}

稍后将其用于背景颜色：

HSSFColor lightGray =  setColor(workbook,(byte) 0xE0, (byte)0xE0,(byte) 0xE0);
style2.setFillForegroundColor(lightGray.getIndex());
style2.setFillPattern(CellStyle.SOLID_FOREGROUND);

答案 2

请参见 http://poi.apache.org/spreadsheet/quick-guide.html#CustomColors。

自定义颜色

高铁：

HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet();
HSSFRow row = sheet.createRow((short) 0);
HSSFCell cell = row.createCell((short) 0);
cell.setCellValue("Default Palette");

//apply some colors from the standard palette,
// as in the previous examples.
//we'll use red text on a lime background

HSSFCellStyle style = wb.createCellStyle();
style.setFillForegroundColor(HSSFColor.LIME.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);

HSSFFont font = wb.createFont();
font.setColor(HSSFColor.RED.index);
style.setFont(font);

cell.setCellStyle(style);

//save with the default palette
FileOutputStream out = new FileOutputStream("default_palette.xls");
wb.write(out);
out.close();

//now, let's replace RED and LIME in the palette
// with a more attractive combination
// (lovingly borrowed from freebsd.org)

cell.setCellValue("Modified Palette");

//creating a custom palette for the workbook
HSSFPalette palette = wb.getCustomPalette();

//replacing the standard red with freebsd.org red
palette.setColorAtIndex(HSSFColor.RED.index,
        (byte) 153,  //RGB red (0-255)
        (byte) 0,    //RGB green
        (byte) 0     //RGB blue
);
//replacing lime with freebsd.org gold
palette.setColorAtIndex(HSSFColor.LIME.index, (byte) 255, (byte) 204, (byte) 102);

//save with the modified palette
// note that wherever we have previously used RED or LIME, the
// new colors magically appear
out = new FileOutputStream("modified_palette.xls");
wb.write(out);
out.close();

XSSF：

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)));
style1.setFillPattern(CellStyle.SOLID_FOREGROUND);