Excel表格转html

import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFColor;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * 使用poi读取后自己拼装table
 * 支持excel 2003、2007
 * xls、xlsx
 */
public class PoiExcelToHtml {
    public static void main(String[] args) {
        readExcelToHtml("/Users/ZYB/Downloads/2017张勇波工作总结的副本.xls", "/Users/ZYB/Downloads/index2.html", true);
        //readExcelToHtml("/Users/ZYB/Downloads/补充医疗.xlsx", "/Users/ZYB/Downloads/index2.html", true);
    }

    /**
     * @param filePath    excel源文件文件的路径
     * @param htmlPositon 生成的html文件的路径
     * @param isWithStyle 是否需要表格样式 包含 字体 颜色 边框 对齐方式
     */
    public static String readExcelToHtml(String filePath, String htmlPositon, boolean isWithStyle) {
        InputStream is = null;
        String htmlExcel = null;
        try {
            File sourcefile = new File(filePath);
            is = new FileInputStream(sourcefile);
            Workbook wb = WorkbookFactory.create(is);
            if (wb instanceof XSSFWorkbook) {   //03版excel处理方法
                XSSFWorkbook xWb = (XSSFWorkbook) wb;
                htmlExcel = getExcelInfo(xWb, isWithStyle);
            } else if (wb instanceof HSSFWorkbook) {  //07及10版以后的excel处理方法
                HSSFWorkbook hWb = (HSSFWorkbook) wb;
                htmlExcel = getExcelInfo(hWb, isWithStyle);
            }
            writeFile(htmlExcel, htmlPositon);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return htmlPositon;
    }

    private static String getExcelInfo(Workbook wb, boolean isWithStyle) {
        StringBuffer sb = new StringBuffer();
        Sheet sheet = wb.getSheetAt(0);//获取第一个Sheet的内容
        int lastRowNum = sheet.getLastRowNum();
        Map<String, String> map[] = getRowSpanColSpanMap(sheet);
        sb.append("<table style='word-break:break-all;border-collapse:collapse;table-layout: fixed;' width='100%'>");
        Row row;        //兼容
        Cell cell;    //兼容
        for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) {
            row = sheet.getRow(rowNum);
            if (row == null) continue;
            /*if (isBlankRow(row)) {
                //sb.append("<tr><td></td></tr>");
                continue;
            }*/
            sb.append("<tr>");
            int lastColNum = row.getLastCellNum();
            for (int colNum = row.getFirstCellNum(); colNum < lastColNum; colNum++) {
                cell = row.getCell(colNum);
                //if (cell == null||cell.getCellType() ==HSSFCell.CELL_TYPE_BLANK) {    //特殊情况 空白的单元格会返回null
                /*if (cell == null) {    //特殊情况 空白的单元格会返回null
                    sb.append(
                            "<td style=\"border-top:solid #000000 1px;border-right:solid #000000 1px;border-bottom:solid #000000 1px;border-left:solid #000000 1px;\"></td>");
                    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("<td rowspan= '" + rowSpan + "' colspan= '" + colSpan + "' ");
                } else if (map[1].containsKey(rowNum + "," + colNum)) {
                    map[1].remove(rowNum + "," + colNum);
                    continue;
                } else {
                    sb.append("<td ");
                }
                //判断是否需要样式
                if (isWithStyle) {
                    dealExcelStyle(wb, sheet, cell, sb);//处理单元格样式
                }
                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（ ）
                    sb.append(stringValue.replace(String.valueOf((char) 160), " "));
                }
                sb.append("</td>");
            }
            sb.append("</tr>");
        }

        sb.append("</table>");
        return sb.toString();
    }

    public static boolean isBlankRow(Row row) {
        if (row == null)
            return true;
        boolean result = true;
        for (int i = row.getFirstCellNum(); i < row.getLastCellNum(); i++) {
            Cell cell = row.getCell(i, HSSFRow.RETURN_BLANK_AS_NULL);
            String value = "";
            if (cell != null) {
                switch (cell.getCellType()) {
                    case Cell.CELL_TYPE_STRING:
                        value = cell.getStringCellValue();
                        break;
                    case Cell.CELL_TYPE_NUMERIC:
                        value = String.valueOf((int) cell.getNumericCellValue());
                        break;
                    case Cell.CELL_TYPE_BOOLEAN:
                        value = String.valueOf(cell.getBooleanCellValue());
                        break;
                    case Cell.CELL_TYPE_FORMULA:
                        value = String.valueOf(cell.getCellFormula());
                        break;
                    //case Cell.CELL_TYPE_BLANK:
                    //    break;
                    default:
                        break;
                }
                if (!value.trim().equals("")) {
                    result = false;
                    break;
                }
            }
        }
        return result;
    }

    private static Map<String, String>[] getRowSpanColSpanMap(Sheet sheet) {

        Map<String, String> map0 = new HashMap<String, String>();
        Map<String, String> map1 = new HashMap<String, String>();
        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;
    }

    /**
     * 获取表格单元格Cell内容
     *
     * @param cell
     * @return
     */
    private static String getCellValue(Cell cell) {
        String result = "";
        if (cell != null) {
            switch (cell.getCellType()) {
                case HSSFCell.CELL_TYPE_STRING:
                    result = cell.getRichStringCellValue().getString().trim();
                    break;
                case HSSFCell.CELL_TYPE_NUMERIC:
                    short format = cell.getCellStyle().getDataFormat();
            /*
            所有日期格式都可以通过getDataFormat()值来判断
            yyyy-MM-dd-----    14
            yyyy年m月d日---    31
            yyyy年m月-------    57
            m月d日  ----------    58
            HH:mm-----------    20
            h时mm分  -------    32
            */
                    if (HSSFDateUtil.isCellDateFormatted(cell)) {// 处理日期格式、时间格式
                        SimpleDateFormat sdf;
                        if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat("h:mm")) {
                            sdf = new SimpleDateFormat("HH:mm");
                        } else {// 日期
                            sdf = new SimpleDateFormat("yyyy-MM-dd");
                        }
                        Date date = cell.getDateCellValue();
                        result = sdf.format(date);
                    } else if (format == 14 || format == 31 || format == 57 || format == 58) {
                        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
                        double value = cell.getNumericCellValue();
                        Date date = org.apache.poi.ss.usermodel.DateUtil.getJavaDate(value);
                        result = sdf.format(date);
                    } else if (format == 20 || format == 32) {
                        SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
                        double value = cell.getNumericCellValue();
                        Date date = org.apache.poi.ss.usermodel.DateUtil.getJavaDate(value);
                        result = sdf.format(date);
                    } else {
                        result = String.valueOf(cell.getNumericCellValue());
                    }
                    break;
                case HSSFCell.CELL_TYPE_BOOLEAN:
                    result = String.valueOf(cell.getBooleanCellValue()).trim();
                    break;
                case HSSFCell.CELL_TYPE_FORMULA:
                    result = cell.getCellFormula();
                    break;
                case HSSFCell.CELL_TYPE_BLANK:
                    result = "";
                default:
                    result = "";
            }
        }
        return result;
    }

    /**
     * 处理表格样式
     *
     * @param wb
     * @param sheet
     * @param sb
     */
    private static void dealExcelStyle(Workbook wb, Sheet sheet, Cell cell, StringBuffer sb) {
        if (cell != null) {
            CellStyle cellStyle = cell.getCellStyle();

            if (cellStyle != null) {
                sb.append("valign='" + convertVerticalAlignToHtml(cellStyle.getVerticalAlignment())
                        + "' ");//单元格中内容的垂直排列方式
                if (wb instanceof XSSFWorkbook) {
                    XSSFFont xf = ((XSSFCellStyle) cellStyle).getFont();
                    sb.append("style='");
                    sb.append("font-weight:").append(xf.getBoldweight()).append(";"); // 字体加粗
                    sb.append("font-size: ").append(xf.getFontHeightInPoints()).append(";"); // 字体大小
                    sb.append("font-family:\"").append(xf.getFontName()).append("\";");
                    sb.append("text-decoration:").append(xf.getUnderline() == 0 ? "none" : "underline").append(";");
                    if (xf.getItalic())
                        sb.append("font-style:italic;");
                    sb.append("height:").append(sheet.getDefaultRowHeightInPoints()).append("px;");
                    //sb.append("width:").append(sheet.getColumnWidthInPixels(cell.getColumnIndex())).append("px;");
                    sb.append("text-align:").append(convertAlignToHtml(cellStyle.getAlignment())).append(";");//表头排版样式
                    XSSFColor xc = xf.getXSSFColor();
                    if (xc != null && !"".equals(xc)) {
                        sb.append("color:#").append(xc.getARGBHex().substring(2)).append(";"); // 字体颜色
                    }
                    XSSFColor bgColor = (XSSFColor) cellStyle.getFillForegroundColorColor();
                    if (bgColor != null && !"".equals(bgColor)) {
                        sb.append("background-color:#").append(bgColor.getARGBHex().substring(2)).append(";"); // 背景颜色
                    }
                    sb.append(getBorderStyle(0, cellStyle.getBorderTop(),
                            ((XSSFCellStyle) cellStyle).getTopBorderXSSFColor()));
                    sb.append(getBorderStyle(1, cellStyle.getBorderRight(),
                            ((XSSFCellStyle) cellStyle).getRightBorderXSSFColor()));
                    sb.append(getBorderStyle(2, cellStyle.getBorderBottom(),
                            ((XSSFCellStyle) cellStyle).getBottomBorderXSSFColor()));
                    sb.append(getBorderStyle(3, cellStyle.getBorderLeft(),
                            ((XSSFCellStyle) cellStyle).getLeftBorderXSSFColor()));
                } else if (wb instanceof HSSFWorkbook) {
                    HSSFFont hf = ((HSSFCellStyle) cellStyle).getFont(wb);
                    HSSFPalette palette = ((HSSFWorkbook) wb).getCustomPalette(); // 类HSSFPalette用于求的颜色的国际标准形式
                    HSSFColor hc = palette.getColor(hf.getColor());
                    sb.append("style='");
                    sb.append("font-weight:").append(hf.getBoldweight()).append(";"); // 字体加粗
                    sb.append("font-size:").append(hf.getFontHeightInPoints()).append(";"); // 字体大小
                    sb.append("font-family:\"").append(hf.getFontName()).append("\";");
                    sb.append("text-decoration:").append(hf.getUnderline() == 0 ? "none" : "underline").append(";");
                    if (hf.getItalic())
                        sb.append("font-style:italic;");
                    sb.append("text-align:").append(convertAlignToHtml(cellStyle.getAlignment())).append(";");//表头排版样式
                    String fontColorStr = convertToStardColor(hc);
                    if (fontColorStr != null && !"".equals(fontColorStr.trim())) {
                        sb.append("color:").append(fontColorStr).append(";"); // 字体颜色
                    }
                    sb.append("height:").append(sheet.getDefaultRowHeightInPoints()).append("px;");
                    //sb.append("width:").append(sheet.getColumnWidthInPixels(cell.getColumnIndex())).append("px;");
                    String bgColorStr = convertToStardColor(palette.getColor(cellStyle.getFillForegroundColor()));
                    if (bgColorStr != null && !"".equals(bgColorStr.trim())) {
                        sb.append("background-color:").append(bgColorStr).append(";"); // 背景颜色
                    }
                    sb.append(getBorderStyle(palette, 0, cellStyle.getBorderTop(), cellStyle.getTopBorderColor()));
                    sb.append(getBorderStyle(palette, 1, cellStyle.getBorderRight(), cellStyle.getRightBorderColor()));
                    sb.append(getBorderStyle(palette, 3, cellStyle.getBorderLeft(), cellStyle.getLeftBorderColor()));
                    sb.append(
                            getBorderStyle(palette, 2, cellStyle.getBorderBottom(), cellStyle.getBottomBorderColor()));
                }
                sb.append("' ");
            }
        }
    }

    /**
     * 单元格内容的水平对齐方式
     *
     * @param alignment
     * @return
     */
    private static String convertAlignToHtml(short alignment) {
        String align = "left";
        switch (alignment) {
            case CellStyle.ALIGN_LEFT:
                align = "left";
                break;
            case CellStyle.ALIGN_CENTER:
                align = "center";
                break;
            case CellStyle.ALIGN_RIGHT:
                align = "right";
                break;
            default:
                break;
        }
        return align;
    }

    /**
     * 单元格中内容的垂直排列方式
     *
     * @param verticalAlignment
     * @return
     */
    private static String convertVerticalAlignToHtml(short verticalAlignment) {
        String valign = "middle";
        switch (verticalAlignment) {
            case CellStyle.VERTICAL_BOTTOM:
                valign = "bottom";
                break;
            case CellStyle.VERTICAL_CENTER:
                valign = "center";
                break;
            case CellStyle.VERTICAL_TOP:
                valign = "top";
                break;
            default:
                break;
        }
        return valign;
    }

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

    static String[] bordesr = {"border-top:", "border-right:", "border-bottom:", "border-left:"};
    static String[] borderStyles = {"solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid ", "solid ",
            "solid ", "solid", "solid", "solid", "solid", "solid"};

    private static String getBorderStyle(HSSFPalette palette, int b, short s, short t) {
        if (s == 0)
            return bordesr[b] + borderStyles[s] + "#d0d7e5 0px;";
        String borderColorStr = convertToStardColor(palette.getColor(t));
        borderColorStr = borderColorStr == null || borderColorStr.length() < 1 ? "#000000" : borderColorStr;
        return bordesr[b] + borderStyles[s] + borderColorStr + " 1px;";
    }

    private static String getBorderStyle(int b, short s, XSSFColor xc) {
        if (s == 0)
            return bordesr[b] + borderStyles[s] + "#d0d7e5 0px;";
        if (xc != null && !"".equals(xc)) {
            String borderColorStr = xc.getARGBHex();//t.getARGBHex();
            borderColorStr =
                    borderColorStr == null || borderColorStr.length() < 1 ? "#000000" : borderColorStr.substring(2);
            return bordesr[b] + borderStyles[s] + borderColorStr + " 1px;";
        }
        return "";
    }

    /*
     * @param content 生成的excel表格标签
     * @param htmlPath 生成的html文件地址
     */
    private static void writeFile(String content, String htmlPath) {
        File file2 = new File(htmlPath);
        StringBuilder sb = new StringBuilder();
        try {
            file2.createNewFile();//创建文件
            sb.append(
                    "<html><head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"><title>Excel Convert Html</title></head><body>");
            sb.append("<div>");
            sb.append(content);
            sb.append("</div>");
            sb.append("</body></html>");
            PrintStream printStream = new PrintStream(new FileOutputStream(file2));
            printStream.println(sb.toString());//将字符串写入文件
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}