利用POI读取excel文件,转换为html

[java]代码库

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPalette;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddress;

/**
 * 利用POI读取excel,转换为html
 * 
 */
public class POIReadExcel {
	public static void main(String[] args) {
		try {
			POIReadExcel poire = new POIReadExcel();
			String path = "D:\\test.xls";
			File sourcefile = new File(path);
			InputStream is = new FileInputStream(sourcefile);
			POIFSFileSystem fs = new POIFSFileSystem(is);
			HSSFWorkbook wb = new HSSFWorkbook(fs);
			System.out.println(poire.getExcelInfo(wb));
			is.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public String getExcelInfo(HSSFWorkbook wb) throws Exception {
		StringBuffer sb = new StringBuffer();
		Sheet sheet = wb.getSheetAt(0);
		int lastRowNum = sheet.getLastRowNum();
		Map map[] = getRowSpanColSpanMap(sheet);
		sb.append(" ");
		HSSFRow row = null;
		HSSFCell cell = null;
		// System.out.println(sheet.getPhysicalNumberOfRows());
		for (int rowNum = sheet.getFirstRowNum(); rowNum < lastRowNum; rowNum++) {
			row = (HSSFRow) sheet.getRow(rowNum);
			if (row == null) {
				sb.append(" ");
				continue;
			}
			sb.append(" ");
			int lastColNum = row.getLastCellNum();
			for (int colNum = 0; colNum < lastColNum; colNum++) {
				cell = row.getCell(colNum);
				if (cell == null) {
					sb.append(" ");
					continue;
				}
				String stringValue = getCellValue(cell);
				if (map[0].containsKey(rowNum + "," + colNum)) {
					String pointString = map[0].get(rowNum + "," + colNum);
					map[0].remove(rowNum + "," + colNum);
					int bottomeRow = Integer.valueOf(pointString.split(",")[0]);
					int bottomeCol = Integer.valueOf(pointString.split(",")[1]);
					int rowSpan = bottomeRow - rowNum + 1;
					int colSpan = bottomeCol - colNum + 1;
					sb.append(" ");
				} else if (map[1].containsKey(rowNum + "," + colNum)) {
					map[1].remove(rowNum + "," + colNum);
					continue;
				} else {
					sb.append(" ");
				}
				HSSFCellStyle cellStyle = cell.getCellStyle();
				if (cellStyle != null) {
					short alignment = cellStyle.getAlignment();
					sb.append("align='" + convertAlignToHtml(alignment) + "' ");
					short verticalAlignment = cellStyle.getVerticalAlignment();
					sb.append("valign='"
							+ convertVerticalAlignToHtml(verticalAlignment)
							+ "' ");
					HSSFFont hf = cellStyle.getFont(wb);
					short boldWeight = hf.getBoldweight();
					short fontColor = hf.getColor();
					sb.append("style='");
					HSSFPalette palette = wb.getCustomPalette(); // 类HSSFPalette用于求的颜色的国际标准形式
					HSSFColor hc = palette.getColor(fontColor);
					sb.append("font-weight:" + boldWeight + ";"); // 字体加粗
					// System.out.println(hf.getFontHeight());
					sb.append("font-size: " + hf.getFontHeight() / 2 + "%;"); // 字体大小
					String fontColorStr = convertToStardColor(hc);
					if (fontColorStr != null && !"".equals(fontColorStr.trim())) {
						sb.append("color:" + fontColorStr + ";"); // 字体颜色
					}
					short bgColor = cellStyle.getFillForegroundColor();
					hc = palette.getColor(bgColor);
					String bgColorStr = convertToStardColor(hc);
					if (bgColorStr != null && !"".equals(bgColorStr.trim())) {
						sb.append("background-color:" + bgColorStr + ";"); // 背景颜色
					}
					short borderColor = cellStyle.getBottomBorderColor();
					hc = palette.getColor(borderColor);
					String borderColorStr = convertToStardColor(hc);
					if (borderColorStr != null
							&& !"".equals(borderColorStr.trim())) {
						sb.append("border-color:" + borderColorStr + ";"); // 边框颜色
					}
					// boolean borderBoolean = cellStyle.getWrapText();
					//
					// if(borderBoolean){
					// sb.append("border-style: inset;");
					// }
					sb.append("' ");
				}
				sb.append(">");
				if (stringValue == null || "".equals(stringValue.trim())) {
					sb.append(" ");
				} else {
					// 将ascii码为160的空格转换为html下的空格（&nbsp;）
					sb.append(stringValue.replace(String.valueOf((char) 160),
							"&nbsp;"));
				}
				sb.append(" ");
			}
			sb.append(" ");
		}
		sb.append(" ");
		return sb.toString();
	}

	@SuppressWarnings("unchecked")
	private Map[] getRowSpanColSpanMap(Sheet sheet) {
		Map map0 = new HashMap();
		Map map1 = new HashMap();
		int mergedNum = sheet.getNumMergedRegions();
		CellRangeAddress range = null;
		for (int i = 0; i < mergedNum; i++) {
			range = sheet.getMergedRegion(i);
			int topRow = range.getFirstRow();
			int topCol = range.getFirstColumn();
			int bottomRow = range.getLastRow();
			int bottomCol = range.getLastColumn();
			map0.put(topRow + "," + topCol, bottomRow + "," + bottomCol);
			// System.out.println(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 String convertAlignToHtml(short alignment) {
		String align = "left";
		switch (alignment) {
		case HSSFCellStyle.ALIGN_LEFT:
			align = "left";
			break;
		case HSSFCellStyle.ALIGN_CENTER:
			align = "center";
			break;
		case HSSFCellStyle.ALIGN_RIGHT:
			align = "right";
			break;
		default:
			break;
		}
		return align;
	}

	private String convertVerticalAlignToHtml(short verticalAlignment) {
		String valign = "middle";
		switch (verticalAlignment) {
		case HSSFCellStyle.VERTICAL_BOTTOM:
			valign = "bottom";
			break;
		case HSSFCellStyle.VERTICAL_CENTER:
			valign = "center";
			break;
		case HSSFCellStyle.VERTICAL_TOP:
			valign = "top";
			break;
		default:
			break;
		}
		return valign;
	}

	private String convertToStardColor(HSSFColor hc) {
		StringBuffer sb = new StringBuffer("");
		if (hc != null) {
			if (HSSFColor.AUTOMATIC.index == hc.getIndex()) {
				return null;
			}
			sb.append("#");
			for (int i = 0; i < hc.getTriplet().length; i++) {
				sb.append(fillWithZero(Integer.toHexString(hc.getTriplet()[i])));
			}
		}
		return sb.toString();
	}

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

	private String getCellValue(HSSFCell cell) {
		switch (cell.getCellType()) {
		case HSSFCell.CELL_TYPE_NUMERIC:
			DecimalFormat format = new DecimalFormat("#0.##");
			return format.format(cell.getNumericCellValue());
			// return String.valueOf(cell.getNumericCellValue());
		case HSSFCell.CELL_TYPE_STRING:
			return cell.getStringCellValue();
			// case HSSFCell.CELL_TYPE_FORMULA:
			//
			// return cell.getCellFormula();
		default:
			return "";
		}
	}
}