excel转html

1.效果展示

2.引入pom依赖包

        <!--  excel2html  -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>3.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-excelant</artifactId>
            <version>3.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>ooxml-schemas</artifactId>
            <version>1.3</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>1.3.2</version>
        </dependency>

　　

3.代码

package com.html;


import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPalette;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
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 sun.util.resources.cldr.rwk.CurrencyNames_rwk;

public class Excel2Html {

    /**
     * 读取Excel并转换成html
     *
     * @param filePath    需要转换的excel文件路径
     * @param htmlPostion 转换后html存放路径
     * @param isWithStyle 是否需要样式
     * @param theme       主题（1--深色背景；2--浅色背景）
     * @return
     */
    public static String readExcelToHtml(String filePath, String htmlPostion, boolean isWithStyle, int theme) {
        InputStream is = null;
        String htmlExcel = null;
        try {
            File sourceFile = new File( filePath );
            is = new FileInputStream( sourceFile );
            Workbook wb = WorkbookFactory.create( is );

            if (wb instanceof HSSFWorkbook) {// 03版excel处理方法
                HSSFWorkbook hwb = (HSSFWorkbook) wb;
                htmlExcel = Excel2Html.getExcelInfo( hwb, isWithStyle, theme );
            } else {   // 07以及10版本以后的excel处理方法
                XSSFWorkbook xwb = (XSSFWorkbook) wb;
                htmlExcel = Excel2Html.getExcelInfo( xwb, isWithStyle, theme );
            }
            writeFile( htmlExcel, htmlPostion, theme );
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return htmlExcel;
    }

    /**
     * @param wb
     * @param isWithStyle 是否需要样式
     * @param theme       主题（1--深色背景；2--浅色背景）
     * @return
     */
    private static String getExcelInfo(Workbook wb, boolean isWithStyle, int theme) {
        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 );
        if (theme == 1) {
            //深色背景样式
            sb.append( "<table style='border-collapse:collapse;background: #263B5C;' width='100%'>" );
        } else if (theme == 2) {
            //浅色背景样式
            sb.append( "<table style='border-collapse:collapse;background: #fffff;' width='100%'>" );
        }
        Row row = null;
        Cell cell = null;
        for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) {
            row = sheet.getRow( rowNum );
            if (row == null) {
                sb.append( "<tr><td ><nobr> </nobr></td></tr>" );
                continue;
            }
            sb.append( "<tr>" );
            int lastColNum = row.getLastCellNum();
            for (int colNum = 0; colNum < lastColNum; colNum++) {
                cell = row.getCell( colNum );
                if (cell == null) {
                    sb.append( "<td></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( "><nobr>" );
                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( "</nobr></td>" );
            }
            sb.append( "</tr>" );
        }
        sb.append( "</table>" );
        return sb.toString();
    }

    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 );
            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 = new String();
        switch (cell.getCellType()) {
            case Cell.CELL_TYPE_NUMERIC:// 数字类型
                if (HSSFDateUtil.isCellDateFormatted( cell )) {// 处理日期格式、时间格式
                    SimpleDateFormat sdf = null;
                    if (cell.getCellStyle().getDataFormat() == HSSFDataFormat.getBuiltinFormat( "h:mm" )) {
                        sdf = new SimpleDateFormat( "HH:mm" );
                    } else {
                        sdf = new SimpleDateFormat( "yyyy-MM-dd" );
                    }
                    Date date = cell.getDateCellValue();
                    result = sdf.format( date );
                } else if (cell.getCellStyle().getDataFormat() == 58) {

                    //处理自定义日期格式：m月d日(通过判断单元格的格式id解决，id的值是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 {
                    double value = cell.getNumericCellValue();
                    CellStyle style = cell.getCellStyle();
                    DecimalFormat format = new DecimalFormat();
                    String temp = style.getDataFormatString();

                    //单元格设置成常规
                    if (temp.equals( "General" )) {
                        format.applyPattern( "#" );
                    }
                    result = format.format( value );
                }
                break;
            case Cell.CELL_TYPE_STRING:// String类型
                result = cell.getRichStringCellValue().toString();
                break;
            case Cell.CELL_TYPE_BLANK:
                result = "";
                break;
            default:
                result = "";
                break;
        }

        return result;
    }

    /**
     * 处理表格样式
     *
     * @param wb
     * @param sheet
     * @param cell
     * @param sb
     */
    private static void dealExcelStyle(Workbook wb, Sheet sheet, Cell cell, StringBuffer sb) {
        CellStyle cellStyle = cell.getCellStyle();
        if (cellStyle != null) {
            short alignment = cellStyle.getAlignment();
            sb.append( "align='" + convertAlignToHtml( alignment ) + "' " ); // 单元格内容的水平对齐方式
            short verticalAlignment = cellStyle.getVerticalAlignment();

            //sb.append("valign='"+ convertVerticalAlignToHtml(verticalAlignment)+ "' ");//单元格中内容的垂直排列方式
            sb.append( "valign='center' " ); // 单元格中内容的垂直排列方式
            if (wb instanceof XSSFWorkbook) {
                XSSFFont xf = ((XSSFCellStyle) cellStyle).getFont();
                short boldWeight = xf.getBoldweight();
                String align = convertAlignToHtml( alignment );
                sb.append( "style='" );
                sb.append( "font-weight:" + boldWeight + ";" ); // 字体加粗

                // sb.append("font-size: " + xf.getFontHeight() / 2 + "%;"); // 字体大小
                sb.append( "font-size: 14px;" ); // 字体大小
                int columnWidth = sheet.getColumnWidth( cell.getColumnIndex() );
                sb.append( "" + columnWidth + "px;" );
                sb.append( "text-align:" + align + ";" );// 表头排版样式
                XSSFColor xc = xf.getXSSFColor();
                if (xc != null && !"".equals( xc )) {
                    sb.append( "color:#" + xc.getARGBHex().substring( 2 ) + ";" ); // 字体颜色
                }
                XSSFColor bgColor = (XSSFColor) cellStyle.getFillForegroundColorColor();
                if (bgColor != null && !"".equals( bgColor )) {
                    sb.append( "background-color:#" + bgColor.getARGBHex().substring( 2 ) + ";" ); // 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 );
                short boldWeight = hf.getBoldweight();
                short fontColor = hf.getColor();
                sb.append( "style='" );
                HSSFPalette palette = ((HSSFWorkbook) 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
//                sb.append( "font-size: " + hf.getFontHeight() / 2 + "%;" ); // 字体大小
                sb.append( "font-size: 14px;" ); // 字体大小
                String align = convertAlignToHtml( alignment );
                sb.append( "text-align:" + align + ";" );// 表头排版样式
                String fontColorStr = convertToStardColor( hc );
                if (fontColorStr != null && !"".equals( fontColorStr.trim() )) {
                    sb.append( "color:" + fontColorStr + ";" ); // 字体颜色
                }
                int columnWidth = sheet.getColumnWidth( cell.getColumnIndex() );
                sb.append( "" + columnWidth + "px;" );
                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
                }
                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 = "center";
        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] + "#5a6882 1px;";
        }
        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] + "#5a6882 1px;";
        }
        if (xc != null && !"".equals( xc )) {
            String borderColorStr = xc.getARGBHex();
            borderColorStr = borderColorStr == null || borderColorStr.length() < 1 ? "#000000"
                    : borderColorStr.substring( 2 );
            return bordesr[b] + borderStyles[s] + borderColorStr + " 1px;";
        }

        return "";
    }

    /**
     * 将内容写进html
     *
     * @param content  html内容
     * @param htmlPath html路径
     * @param theme    主题（1--深色背景；2--浅色背景）
     */
    private static void writeFile(String content, String htmlPath, int theme) {
        File file = new File( htmlPath );
        StringBuilder sb = new StringBuilder();
        try {
            file.createNewFile();// 创建文件
            sb.append(
                    "<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Excel2Html Test</title></head>" );
            if (theme == 1) {

                //深色背景样式
                sb.append( "<style>tr {height: 50px;} nobr {color: #fff;}</style>" );
            } else {

                //浅色背景样式
                sb.append( "<style>tr {height: 50px;} nobr {color: #515f6d;}</style>" );
            }
            sb.append( "<body>" );
            sb.append( "<div>" );
            sb.append( content );
            sb.append( "</div>" );
            sb.append( "</body></html>" );

            PrintStream printStream = new PrintStream( new FileOutputStream( file ) );
            printStream.println( sb.toString() );// 将字符串写入文件
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
        String str = "整车进口数量年度统计.xlsx";
        System.out.println( str.split( "\." )[0] );
        Excel2Html.readExcelToHtml( "/Users/zhenning/Documents/idea/httpClient/result/result_2020-09-20 08:53:23.xlsx",
                "/Users/zhenning/Desktop/测试2.html", true, 2 );
    }
}