java将Excel转化为Html

package com.sd.sdcj.util.excel;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.Writer;
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;

/**
* @功能描述 POI 读取 Excel 转 HTML 支持 03xls 和 07xlsx 版本  包含样式
*/
public class POIReadExcelToHtml {

    /**
     * 测试
     * @param args
     */
    public static void pdf2html(String path) {
        
        //String path = "C:\\Users\\yugb\\Desktop\\tohtml.xlsx";
        InputStream is = null;
        String htmlExcel = null;
        Writer wr=null;
        try {
            File sourcefile = new File(path);
            is = new FileInputStream(sourcefile);
            Workbook wb = WorkbookFactory.create(is);//此WorkbookFactory在POI-3.10版本中使用需要添加dom4j
            if (wb instanceof XSSFWorkbook) {
                XSSFWorkbook xWb = (XSSFWorkbook) wb;
                htmlExcel = POIReadExcelToHtml.getExcelInfo(xWb,true);
            }else if(wb instanceof HSSFWorkbook){
                HSSFWorkbook hWb = (HSSFWorkbook) wb;
                htmlExcel = POIReadExcelToHtml.getExcelInfo(hWb,true);
            }
            System.out.println(htmlExcel);
            File file=new File(path.substring(0,path.lastIndexOf("."))+".html");
            if(!file.exists()){
                file.createNewFile();
            }
            wr=new FileWriter(file);
            wr.write(htmlExcel);
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            try {
                if(is!=null){
                    is.close();
                }
                if(wr!=null){
                    wr.close();
                }
                
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
    
    
    /**
     * 程序入口方法
     * @param filePath 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
     * @return <table>...</table> 字符串
     */
    public String readExcelToHtml(String filePath , 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) {
                XSSFWorkbook xWb = (XSSFWorkbook) wb;
                htmlExcel = POIReadExcelToHtml.getExcelInfo(xWb,isWithStyle);
            }else if(wb instanceof HSSFWorkbook){
                HSSFWorkbook hWb = (HSSFWorkbook) wb;
                htmlExcel = POIReadExcelToHtml.getExcelInfo(hWb,isWithStyle);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return htmlExcel;
    }
    
    
    
    public 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=‘border-collapse:collapse;‘ width=‘100%‘>");
        Row row = null;        //兼容
        Cell cell = null;    //兼容
        
        for (int rowNum = sheet.getFirstRowNum(); rowNum <= lastRowNum; rowNum++) {
            row = sheet.getRow(rowNum);
            if (row == null) {
                sb.append("<tr><td > &nbsp;</td></tr>");
                continue;
            }
            sb.append("<tr>");
            int lastColNum = row.getLastCellNum();
            for (int colNum = 0; colNum < lastColNum; colNum++) {
                cell = row.getCell(colNum);
                if (cell == null) {    //特殊情况 空白的单元格会返回null
                    sb.append("<td>&nbsp;</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(" &nbsp; ");
                } 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("</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);
            // 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 = 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 {// 日期  
                    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
            
            if (wb instanceof XSSFWorkbook) {
                            
                XSSFFont xf = ((XSSFCellStyle) cellStyle).getFont(); 
                short boldWeight = xf.getBoldweight();
                sb.append("style=‘");
                sb.append("font-weight:" + boldWeight + ";"); // 字体加粗
                sb.append("font-size: " + xf.getFontHeight() / 2 + "%;"); // 字体大小
                int columnWidth = sheet.getColumnWidth(cell.getColumnIndex()) ;
                sb.append("width:" + columnWidth + "px;");
                
                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();
                //System.out.println("************************************");
                //System.out.println("BackgroundColorColor: "+cellStyle.getFillBackgroundColorColor());
                //System.out.println("ForegroundColor: "+cellStyle.getFillForegroundColor());//0
                //System.out.println("BackgroundColorColor: "+cellStyle.getFillBackgroundColorColor());
                //System.out.println("ForegroundColorColor: "+cellStyle.getFillForegroundColorColor());
                //String bgColorStr = bgColor.getARGBHex();
                //System.out.println("bgColorStr: "+bgColorStr);
                if (bgColor != null && !"".equals(bgColor)) {
                    sb.append("background-color:#" + bgColor.getARGBHex().substring(2) + ";"); // 鑳屾櫙棰滆壊
                }
                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(); // 绫籋SSFPalette鐢ㄤ簬姹傜殑棰滆壊鐨勫浗闄呮爣鍑嗗舰寮?
                HSSFColor hc = palette.getColor(fontColor);
                sb.append("font-weight:" + boldWeight + ";"); // 瀛椾綋鍔犵矖
                sb.append("font-size: " + hf.getFontHeight() / 2 + "%;"); // 瀛椾綋澶у皬
                String fontColorStr = convertToStardColor(hc);
                if (fontColorStr != null && !"".equals(fontColorStr.trim())) {
                    sb.append("color:" + fontColorStr + ";"); // 瀛椾綋棰滆壊
                }
                int columnWidth = sheet.getColumnWidth(cell.getColumnIndex()) ;
                sb.append("width:" + 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 + ";"); // 鑳屾櫙棰滆壊
                }
                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 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]+"#d0d7e5 1px;";;
         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 "";
    }

}

package com.sd.sdcj.controller.excel_html;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import com.sd.cloud.constant.SDConstants;
import com.sd.sdcj.util.excel.POIReadExcelToHtml;

@Controller
@RequestMapping(value="/excel_html")
public class Excel_Html {

    @RequestMapping(value="/look")
    public void look(HttpServletRequest request,HttpServletResponse response,
            @RequestParam(value="fileName") String fileName
            ){
        System.out.println(fileName);
        if(fileName!=null){
            fileName=SDConstants.fileDir+fileName.substring(fileName.indexOf("fileName=")+9,fileName.indexOf("?oldFileName="));
            //excel名字
            String excle=fileName;
            //转换
            String fileType = excle.substring(excle.lastIndexOf(".")+1);
            System.out.println(fileType);
            if("xls".equalsIgnoreCase(fileType)||"xlsx".equalsIgnoreCase(fileType)||"xlsm".equalsIgnoreCase(fileType)){
                //读取显示
                //以下是读取excel
                fileName=fileName.substring(0,fileName.lastIndexOf("."))+".html";
                System.out.println("");
                //判断是否已经转换过
                if(!new File(fileName).exists()){
                    POIReadExcelToHtml.pdf2html(excle);
                }
                
                System.out.println(fileName);
                PrintWriter writer=null;
                BufferedReader br=null;
                try {
                    request.setCharacterEncoding("utf-8");
                    response.setHeader("Content-type", "text/html;charset=UTF-8");
                    response.setCharacterEncoding("utf-8");
                    writer = response.getWriter();
                    br=new BufferedReader(new FileReader(new File(fileName)));
                    String html=null;
                    while((html = br.readLine()) != null){
                        writer.write(html);
                    }
                    
                    
                } catch (IOException e) {
                    e.printStackTrace();
                }finally{
                    if(writer!=null){
                        writer.close();
                    }
                    if(br!=null){
                        try {
                            br.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                    
                }
            }
        }
    }
}