apache poi读取excel中的颜色,真是坑爹啊

工作原因,需要使用poi来读取excel中的所有内容.

其他都还好说,就颜色是到目前为止最坑爹的,估计是当初写的时候只针对97-2003了,现在出来2007,搞得乱七八糟的.

通过自己查找源码,终于算是搞定了.

?

代码如下:

首先定义个颜色的bean

public class ColorInfo{
	/**
	 * 颜色的alpha值，此值控制了颜色的透明度
	 */
	public int A;
	/**
	 * 颜色的红分量值，Red
	 */
	public int R;
	/**
	 * 颜色的绿分量值，Green
	 */
	public int G;
	/**
	 * 颜色的蓝分量值，Blue
	 */
	public int B;

	public int toRGB() {
		return this.R << 16 | this.G << 8 | this.B;
	}

    public java.awt.Color toAWTColor(){
        return new java.awt.Color(this.R,this.G,this.B,this.A);
    }

	public static ColorInfo fromARGB(int red, int green, int blue) {
		return new ColorInfo((int) 0xff, (int) red, (int) green, (int) blue);
	}
	public static ColorInfo fromARGB(int alpha, int red, int green, int blue) {
		return new ColorInfo(alpha, red, green, blue);
	}
	public ColorInfo(int a,int r, int g , int b ) {
		this.A = a;
		this.B = b;
		this.R = r;
		this.G = g;
	}
}

?转化工具

	/**
	 * excel97中颜色转化为uof颜色
	 * 
	 * @param color
	 *            颜色序号
	 * @return 颜色或者null
	 */
	private static ColorInfo excel97Color2UOF(Workbook book, short color) {
		if (book instanceof HSSFWorkbook) {
			HSSFWorkbook hb = (HSSFWorkbook) book;
			HSSFColor hc = hb.getCustomPalette().getColor(color);
			ColorInfo ci = excelColor2UOF(hc);
			return ci;
		}
		return null;
	}

	/**
	 * excel(包含97和2007)中颜色转化为uof颜色
	 * 
	 * @param color
	 *            颜色序号
	 * @return 颜色或者null
	 */
	private static ColorInfo excelColor2UOF(Color color) {
		if (color == null) {
			return null;
		}
		ColorInfo ci = null;
		if (color instanceof XSSFColor) {// .xlsx
			XSSFColor xc = (XSSFColor) color;
			byte[] b = xc.getRgb();
			if (b != null) {// 一定是argb
				ci = ColorInfo.fromARGB(b[0], b[1], b[2], b[3]);
			}
		} else if (color instanceof HSSFColor) {// .xls
			HSSFColor hc = (HSSFColor) color;
			short[] s = hc.getTriplet();// 一定是rgb
			if (s != null) {
				ci = ColorInfo.fromARGB(s[0], s[1], s[2]);
			}
		}
		return ci;
	}

?获取单元格式样

Workbook book = WorkbookFactory.create(new  FileInputStream("G:\\Users\\lan\\Desktop\\Book1.xls"))
Sheet eSheet = book.getSheetAt(i);// excel 工作表
Row eRow = eSheet.getRow(r);
Cell eCell = eRow.getCell(c);
CellStyle eStyle = eCell.getCellStyle();

?

?

获取字体颜色

Font eFont = book.getFontAt(eStyle.getFontIndex());
// 字体颜色
ColorInfo color = null;
if (eFont instanceof XSSFFont) {
?XSSFFont f = (XSSFFont) eFont;
	color = excelColor2UOF(f.getXSSFColor());
} else {
	color = excel97Color2UOF(book,eFont.getColor());
}

?获取单元格背景色

// 背景色
if (eStyle.getFillPattern() == CellStyle.SOLID_FOREGROUND) {
	ColorInfo bgColor = excelColor2UOF(style.getFillForegroundColorColor());
}

?获取边框线颜色

//仅列出上边框线颜色
ColorInfo ci = null;
if (eStyle
instanceof XSSFCellStyle) {// 2007
	XSSFCellStyle xs = (XSSFCellStyle) style;
	ci =excelColor2UOF(xs.getTopBorderXSSFColor());
} else {
	ci = excel97Color2UOF(book, eStyle
						.getTopBorderColor());
}

?

发句牢骚,现在通过CellStyle是无法获取对角线的.在2007的式样实现中也仅仅发现有,但是没有提供访问方法.