把table表格内容导出为excel

 package com.chinahrt.report.export;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
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.hssf.util.CellRangeAddress;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Workbook;
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
*/
public void createExcelFormTable(String sheetName,String html,int headNum) throws FileNotFoundException{
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet(sheetName);
CellStyle headStyle = this.createHeadStyle(wb);
CellStyle bodyStyle = this.createBodyStyle(wb);
FileOutputStream os = new FileOutputStream("c:\\table.xls");
SAXBuilder sb = new SAXBuilder();
ByteArrayInputStream is = new ByteArrayInputStream(html.getBytes());
try {
org.jdom.Document document = sb.build(is);
//获取table节点
Element root = document.getRootElement();
//获取tr的list
List<Element> trList = root.getChildren("tr");
int[][] area = getCellArea(trList);
//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
int tdIndex = 0;
for(int ii=0;ii<area[i].length;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);
}
//如果对应的矩阵数字为1，则和横向前一单元格合并
if(area[i][ii]==1){
sheet.addMergedRegion(new CellRangeAddress(i,i,ii-1,ii));
}else if(area[i][ii]==2){//如果对应的矩阵数字为2，则和纵向的前一单元格合并
sheet.addMergedRegion(new CellRangeAddress(i-1,i,ii,ii));
}else{//如果为0，显示td中对应的文字,td序号加1
cell.setCellValue(this.getInnerText(tdList.get(tdIndex)));
tdIndex ++;
}

}

}

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 int[][] 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){
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];
for(int i=0;i<trList.size();i++){
Element tr = trList.get(i);
List<Element> tdList = tr.getChildren("td");
//该行到ii个单元格为止被合并的单元格个数
int rowColspan = 0;
for(int ii=0;ii<tdList.size();ii++){
//本单元格跨度计算前的td数
int oldIndex = ii+rowColspan;
Element td = tdList.get(ii);
int colspan = Integer.valueOf(null==td.getAttributeValue("colspan")?"0":td.getAttributeValue("colspan"));
//colspan为0或者1证明未合并
colspan = colspan>1?colspan:1;
rowColspan += colspan-1;
//单元格需要被横向合并声明为1
for(int m=1;m<colspan;m++){
area[i][oldIndex+m]=1;
}
int rowspan = Integer.valueOf(null==td.getAttributeValue("rowspan")?"0":td.getAttributeValue("rowspan"));
rowspan = rowspan>1?rowspan:1;
//单元格需要被纵向向合并声明为2
for(int m=1;m<rowspan;m++){
area[m+i][oldIndex] = 2;
}
}
}
/*for(int a=0;a<area.length;a++){
for(int b =0;b<area[0].length;b++){
System.out.print(area[a][b]);
}
System.out.println("");
}*/
return area;
}

/**-
* 设置表头样式
* @param wb
* @return
*/
private CellStyle createHeadStyle(Workbook wb){
CellStyle style = wb.createCellStyle();
Font headerFont = wb.createFont();
headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex());
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
style.setFont(headerFont);

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

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

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

private 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 {
// TODO Auto-generated method stub
TableToExcelUtil tu = new TableToExcelUtil();
//	System.out.println(tu.getInnerHtml(\"<td><a>1</a></td>\"));
tu.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);
}

}