Java-----Excel转HTML

尽管是转别人的（忘了哪转过来的了），但此处标为原创不是为了提高訪问量，也不是为了其它。仅仅是纯粹的认为有实际用途。希望能给很多其它有此需求的人看到并能帮到他们就足够了

所需jar包：jxl.jar

package cn.com.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

import jxl.Cell;
import jxl.Range;
import jxl.Sheet;
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.format.CellFormat;
import jxl.format.Colour;
import jxl.format.VerticalAlignment;

public class ExcelTransformHtml {
	/**
	 * 获取Excel文件转换为HTML后的字符串，仅仅支持后缀为xls的Excel（主调方法）
	 * @param sourcefile <span style="font-family: Arial, Helvetica, sans-serif;"> </span>Excel文件
	 * @return 返回Excel转换后的HTML字符串
	 * @throws Exception
	 */
	public static String getExcelInfo(File sourcefile) throws Exception {
		StringBuffer sb = new StringBuffer();
		InputStream is = new FileInputStream(sourcefile);
		Workbook rwb = Workbook.getWorkbook(is);
		Sheet sheet = rwb.getSheet(0);
		int colnum = sheet.getColumns();
		int rownum = sheet.getRows();
		Map<String, String> map[] = getRowSpanColSpanMap(sheet);
		sb.append("<table border='1' cellspacing='0'>");
		for (int row = 0; row < rownum; row++) {
			sb.append("<tr>");
			for (int col = 0; col < colnum; col++) {
				Cell cell = sheet.getCell(col, row);
				String content = cell.getContents();
				CellFormat cellFormat = cell.getCellFormat();
				if (map[0].containsKey(row + "," + col)) {
					String pointString = map[0].get(row + "," + col);
					map[0].remove(row + "," + col);
					int bottomeRow = Integer.valueOf(pointString.split(",")[0]);
					int bottomeCol = Integer.valueOf(pointString.split(",")[1]);
					int rowSpan = bottomeRow - row + 1;
					int colSpan = bottomeCol - col + 1;
					sb.append("<td rowspan= '" + rowSpan + "' colspan= '" + colSpan + "' ");
				} else if (map[1].containsKey(row + "," + col)) {
					map[1].remove(row + "," + col);
					continue;
				} else {
					sb.append("<td ");
				}
				if (cellFormat != null) {
					Alignment alignment = cellFormat.getAlignment();
					sb.append("align='" + convertToHtmlGrammer(alignment) + "' ");
					VerticalAlignment verticalAlignment = cellFormat.getVerticalAlignment();
					sb.append("valign='" + convertToHtmlGrammer(verticalAlignment) + "' ");
					// sb.append("style='color:" + convertToHtmlGrammer(cellFormat.getFont().getColour()) + ";");  //
					Colour bgcolour = cellFormat.getBackgroundColour();
					// sb.append("background-color:" + convertToHtmlGrammer(bgcolour) + ";");  //
					// Colour bottomColour = cellFormat.getBorderColour(Border.BOTTOM);  //
					// Colour leftColour = cellFormat.getBorderColour(Border.LEFT);
					// Colour rightColour = cellFormat.getBorderColour(Border.RIGHT);
					// Colour topColour = cellFormat.getBorderColour(Border.TOP);

					// System.out.print("bottomColour:" +
					// bottomColour.getDescription());
					// System.out.print(" leftColour:" +
					// leftColour.getDescription());
					// System.out.print(" rightColour:" +
					// rightColour.getDescription());
					// System.out.println(" topColour:" +
					// topColour.getDescription());

					// sb.append("border-color:" + convertToHtmlGrammer(bottomColour) + ";");  //
					sb.append("' ");
				}
				sb.append(">");
				if (content == null || "".equals(content.trim())) {
					sb.append("   ");
				} else {
					sb.append(content);
				}
				sb.append("</td>");
			}
			sb.append("</tr>");
		}
		sb.append("</table>");
		rwb.close();
		is.close();
		return sb.toString();
	}

	@SuppressWarnings("unchecked")
	private static Map<String, String>[] getRowSpanColSpanMap(Sheet sheet) {
		Map<String, String> map0 = new HashMap<String, String>();
		Map<String, String> map1 = new HashMap<String, String>();
		Range[] range = sheet.getMergedCells();
		for (int i = 0; i < range.length; i++) {
			Cell topCell = range[i].getTopLeft();
			Cell bottomCell = range[i].getBottomRight();
			int topRow = topCell.getRow();
			int topCol = topCell.getColumn();
			int bottomRow = bottomCell.getRow();
			int bottomCol = bottomCell.getColumn();
			map0.put(topRow + "," + topCol, bottomRow + "," + bottomCol);
			int tempRow = topRow;
			while (tempRow <= bottomRow) {
				int tempCol = topCol;
				while (tempCol <= bottomCol) {
					map1.put(tempRow + "," + tempCol, "");
					tempCol++;
				}
				tempRow++;
			}
			map1.remove(topRow + "," + topCol);
		}
		Map[] map = { map0, map1 };
		return map;
	}

	private static String convertToHtmlGrammer(Alignment alignment) {
		String align = "left";
		switch (alignment.getValue()) {
		case 1:
			align = "left";
			break;
		case 2:
			align = "center";
			break;
		case 3:
			align = "right";
			break;
		case 5:
			align = "justify";
			break;
		default:
			break;
		}
		return align;
	}

	private static String convertToHtmlGrammer(VerticalAlignment verticalAlignment) {
		String valign = "middle";
		switch (verticalAlignment.getValue()) {
		case 1:
			valign = "middle";
			break;
		case 2:
			valign = "bottom";
			break;
		case 3:
			valign = "top";
			break;
		default:
			break;
		}
		return valign;
	}

	/*private static String convertToHtmlGrammer(Colour colour) {
		StringBuffer sb = new StringBuffer("");
		if (colour != null && !"default background".equalsIgnoreCase(colour.getDescription())) {
			sb.append("#");
			sb.append(fillWithZero(Integer.toHexString(colour.getDefaultRGB().getRed())));
			sb.append(fillWithZero(Integer.toHexString(colour.getDefaultRGB().getGreen())));
			sb.append(fillWithZero(Integer.toHexString(colour.getDefaultRGB().getBlue())));
		}
		return sb.toString();
	}*/

	private static String fillWithZero(String str) {
		if (str != null && str.length() < 2) {
			return "0" + str;
		}
		return str;
	}
}