java html table 转 excel，给予jdom 和 poi

maven 引入

<dependency>
            <groupId>org.jdom</groupId>
            <artifactId>jdom</artifactId>
            <version>1.1.3</version>
</dependency>

工具类

import java.io.ByteArrayInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder; 

/**根据table的html代码生成excel
 * @param args
 * zyn
 * 2012-12-19 上午11:35:30
 */
public class TableToExcelUtil { 

    /**
     *
     * @param sheetName
     * @param html
     * @param headNum表头的行数
     * @throws FileNotFoundException
     * zyn
     * 2012-12-21 下午1:44:02
     */
    @SuppressWarnings("unchecked")
    public static void  createExcelFormTable(String sheetName,String html,int headNum) throws FileNotFoundException{
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet(sheetName);
        CellStyle headStyle = createHeadStyle(wb);
        CellStyle bodyStyle = createBodyStyle(wb);
        FileOutputStream os = new FileOutputStream("/Users/apple/Downloads/aa.xls");
        SAXBuilder sb = new SAXBuilder();
        html = html.replaceAll("\n", "");
        ByteArrayInputStream is = new ByteArrayInputStream(html.getBytes());
        try {
            Document document = sb.build(is);
            //获取table节点
            Element root = document.getRootElement();
            //获取tr的list
            List<Element> children =  root.getChildren();

            List<Element> trList = new ArrayList<>();
            List<Element> head = children.get(0).getChildren();
            trList.addAll(head);

            List<Element> body = children.get(1).getChildren();
            trList.addAll(body);

            //循环创建行
            for(int i=0;i<trList.size();i++){
                HSSFRow row = sheet.createRow(i);
                List<Element> tdList = trList.get(i).getChildren("td");
                //该行td的序号
                for(int ii=0;ii< tdList.size();ii++){
                    row.createCell(ii);
                    HSSFCell cell = row.getCell(ii);
                    //判断是否为表头，使用对应的excel格式
                    if(i<headNum){
                        cell.setCellStyle(headStyle);
                    }else{
                        cell.setCellStyle(bodyStyle);
                    }
                    cell.setCellValue(getInnerText(tdList.get(ii))); 

                } 

            }
            List<CellRangeAddress> cellArea = getCellArea(trList);
            if(!cellArea.isEmpty()) {
                for (CellRangeAddress cellRangeAddress : cellArea) {
                    sheet.addMergedRegion(cellRangeAddress);
                }
            }

            wb.write(os);
        } catch (JDOMException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    } 

    /**
     * 导出excel表格二维数组：0为文字占用格，1为横向被合并格，2为纵向合并格
     * @param trList
     * @return
     * zyn
     * 2012-12-21 下午1:35:40
     */
    private static List<CellRangeAddress> getCellArea(List<Element> trList){
        //获取table单元格矩阵
        Element headtr = trList.get(0);
        List<Element> headTdList = headtr.getChildren("td");
        //每行的未经合并的单元格个数
        int cols = 0;
        for(Element e:headTdList){
            System.out.println("#"+e.getText());
            int colspan = Integer.valueOf(null==e.getAttributeValue("colspan")?"0":e.getAttributeValue("colspan"));
            if(colspan==0){
                colspan =1;
            }
            cols += colspan;
        }
        //初始化单元格矩阵
        int[][] area = new int[trList.size()][cols];
        List<CellRangeAddress> cellRangeAddresses = new ArrayList<>();
        Element tr;
        List<Element> tdList;
        Element td;
        int trsize = trList.size();
        int tdsize;
        int colspan;
        int rowspan;
        CellRangeAddress cellRangeAddress;
        for(int row=0;row < trsize;row++){
            tr = trList.get(row);
            tdList = tr.getChildren("td");
            tdsize = tdList.size();
            for(int col=0;col<tdsize;col++){
                td = tdList.get(col);
                colspan = Integer.valueOf(null==td.getAttributeValue("colspan")?"0":td.getAttributeValue("colspan"));
                if(colspan==0){
                    colspan =1;
                }

                rowspan = Integer.valueOf(null==td.getAttributeValue("rowspan")?"0":td.getAttributeValue("rowspan"));
                if(rowspan==0){
                    rowspan = 1;
                }
                if(rowspan > 1) {
                    cellRangeAddress = new CellRangeAddress(row,row + rowspan - 1 ,col,col );
                    cellRangeAddresses.add(cellRangeAddress);
                }

                if(colspan > 1) {
                    cellRangeAddress = new CellRangeAddress(row,row ,col,col+colspan - 1 );
                    cellRangeAddresses.add(cellRangeAddress);
                }
            }
        }
        return cellRangeAddresses;
    } 

    /**-
     * 设置表头样式
     * @param wb
     * @return
     */
    private static CellStyle createHeadStyle(Workbook wb){
        CellStyle style = wb.createCellStyle();
        Font headerFont = wb.createFont();
        headerFont.setBold(true);
        style.setAlignment(HorizontalAlignment.CENTER);
        style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        style.setFont(headerFont); 

        style.setBorderRight(BorderStyle.THIN);
        style.setRightBorderColor(IndexedColors.BLACK.getIndex());
        style.setBorderBottom(BorderStyle.THIN);
        style.setBottomBorderColor(IndexedColors.BLACK.getIndex());
        style.setBorderLeft(BorderStyle.THIN);
        style.setLeftBorderColor(IndexedColors.BLACK.getIndex());
        style.setBorderTop(BorderStyle.THIN);
        style.setTopBorderColor(IndexedColors.BLACK.getIndex());
        return style;
    } 

    /**-
     * 设置表单记录样式
     * @param wb
     * @return
     */
    private static CellStyle createBodyStyle(Workbook wb){
        CellStyle style = wb.createCellStyle();
        Font headerFont = wb.createFont();
        headerFont.setBold(true);
        style.setAlignment(HorizontalAlignment.CENTER);
        style.setFillForegroundColor(IndexedColors.LIGHT_GREEN.getIndex());
        style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        style.setFont(headerFont); 

        style.setBorderRight(BorderStyle.THIN);
        style.setRightBorderColor(IndexedColors.BLACK.getIndex());
        style.setBorderBottom(BorderStyle.THIN);
        style.setBottomBorderColor(IndexedColors.BLACK.getIndex());
        style.setBorderLeft(BorderStyle.THIN);
        style.setLeftBorderColor(IndexedColors.BLACK.getIndex());
        style.setBorderTop(BorderStyle.THIN);
        style.setTopBorderColor(IndexedColors.BLACK.getIndex());
        return style;
    } 

    private static String getInnerText(Element td){
        String txt = "";
        if(td.getText()==null || td.getText().equals("")){
            if(null != td.getChildren()){
                for(int i=0;i<td.getChildren().size();i++){
                    Element e = (Element)td.getChildren().get(i);
                    txt += getInnerText(e);
                }
            }
        }else{
            txt = td.getText();
        }
        return txt; } 

    public static void main(String[] args) throws FileNotFoundException {
        TableToExcelUtil.createExcelFormTable("缴费统计", "<table><tr class=\"titlebg\"><td align=\"center\" nowrap=\"nowrap\" rowspan=\"2\" colspan=\"1\">序号</td><td align=\"center\" nowrap=\"nowrap\" rowspan=\"2\" colspan=\"1\">计划</td><td align=\"center\" nowrap=\"nowrap\" rowspan=\"2\" colspan=\"1\">部门名称</td><td align=\"center\" nowrap=\"nowrap\" colspan=\"6\">线上缴费</td><td align=\"center\" nowrap=\"nowrap\" colspan=\"3\">线下缴费</td><td align=\"center\" nowrap=\"nowrap\" rowspan=\"2\" colspan=\"1\">总计</td></tr><tr class=\"titlebg\"><td align=\"center\" nowrap=\"nowrap\">线上总计</td><td align=\"center\" nowrap=\"nowrap\">快钱</td><td align=\"center\" nowrap=\"nowrap\">支付宝</td><td align=\"center\" nowrap=\"nowrap\">平台余款</td><td align=\"center\" nowrap=\"nowrap\">激活卡</td><td align=\"center\" nowrap=\"nowrap\">其他</td><td align=\"center\" nowrap=\"nowrap\">线下总计</td><td align=\"center\" nowrap=\"nowrap\">本地缴费</td><td align=\"center\" nowrap=\"nowrap\">中心收费</td></tr><tr class=\"whbg\" orgPath=\"01.25.01.\" planId=\"9e508516-5409-4b5d-a0d6-f86ba77eb79f\" ><td align=\"center\" nowrap=\"nowrap\">1</td><td align=\"center\" nowrap=\"nowrap\">盐城2013年培训计划</td><td align=\"center\" nowrap=\"nowrap\">盐城市</td><td align=\"center\" nowrap=\"nowrap\">0</td><td align=\"center\" nowrap=\"nowrap\">0</td><td align=\"center\" nowrap=\"nowrap\">0</td><td align=\"center\" nowrap=\"nowrap\">0</td><td align=\"center\" nowrap=\"nowrap\">0</td><td align=\"center\" nowrap=\"nowrap\">0</td><td align=\"center\" nowrap=\"nowrap\"><a id=\"0-12\" href=\"javascript:showDetail('0-12');\">3</a></td><td align=\"center\" nowrap=\"nowrap\">0</td><td align=\"center\" nowrap=\"nowrap\">0</td><td align=\"center\" nowrap=\"nowrap\"><a id=\"0-15\" href=\"javascript:showDetail('0-15');\">3</a></td></tr><tr class=\"whbg\" orgPath=\"all\" planId=\"all\"><td align=\"center\"  nowrap=\"nowrap\" colspan=\"3\" >总计</td><td align=\"center\" nowrap=\"nowrap\" >0</td><td align=\"center\" nowrap=\"nowrap\" >0</td><td align=\"center\" nowrap=\"nowrap\" >0</td><td align=\"center\" nowrap=\"nowrap\" >0</td><td align=\"center\" nowrap=\"nowrap\" >0</td><td align=\"center\" nowrap=\"nowrap\" >0</td><td align=\"center\" nowrap=\"nowrap\" ><a id=\"4-6\" href=\"javascript:showDetail('4-6');\">3</a></td><td align=\"center\" nowrap=\"nowrap\" >0</td><td align=\"center\" nowrap=\"nowrap\" >0</td><td align=\"center\" nowrap=\"nowrap\" ><a id=\"4-9\" href=\"javascript:showDetail('4-9');\">3</a></td></tr></table>", 2);
    } 

}