根据jxl，对html中的table进行导出excel

import java.io.BufferedOutputStream; import java.io.File; import java.io.IOException; import java.io.OutputStream; import javax.servlet.http.HttpServletResponse; import jxl.Workbook; import jxl.write.Label; import jxl.write.WritableCellFormat; import jxl.write.WritableFont; import jxl.write.WritableSheet; import jxl.write.WritableWorkbook; import jxl.write.WriteException; import jxl.write.biff.RowsExceededException; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import org.springframework.util.ResourceUtils; import com.smartdot.commons.model.AjaxValidate; /** * html导出excel * * 2017-11-9 wanghui */ public class HtmlToExcelUtil { public static void main(String args[]) throws IOException{ ///读取classpath目录下面的路径 String path=HtmlToExcelUtil.class.getResource("/").getPath(); path+="roster.html"; toExcelByFileName(path,"roster"); } //得到Document并且设置编码格式 -根据文件 public static Document getDoc(String fileName) throws IOException{ File myFile=new File(fileName); Document doc= Jsoup.parse(myFile, "UTF-8",""); return doc; } //得到Document并且设置编码格式-根据html public static Document getDocByHtmlStr(String htmlStr) throws IOException{ Document doc= Jsoup.parse(htmlStr); return doc; } ///这个方法用于根据trs行数和sheet画出整个表格 public static void mergeColRow(Elements trs,WritableSheet sheet) throws RowsExceededException, WriteException{ int[][] rowhb=new int[300][300]; for(int i=0;i<trs.size();i++){ Element tr=trs.get(i); Elements tds=tr.getElementsByTag("td"); if(i ==1){ setColWidthByThs(tds, sheet); } if(tds.size() ==0 ){ tds = tr.getElementsByTag("th"); setColWidthByThs(tds, sheet); } int realColNum=0; for(int j=0;j<tds.size();j++){ Element td=tds.get(j); if(rowhb[i][realColNum]!=0){ realColNum=getRealColNum(rowhb,i,realColNum); } int rowspan=1; int colspan=1; if(td.attr("rowspan")!=""){ rowspan = Integer.parseInt(td.attr("rowspan")); } if(td.attr("colspan")!=""){ colspan = Integer.parseInt(td.attr("colspan")); } String text=td.text(); drawMegerCell(rowspan,colspan,sheet,realColNum,i,text,rowhb); realColNum=realColNum+colspan; } } } ///这个方法用于根据样式画出单元格，并且根据rowpan和colspan合并单元格 public static void drawMegerCell(int rowspan,int colspan,WritableSheet sheet,int realColNum,int realRowNum,String text,int[][] rowhb) throws RowsExceededException, WriteException{ for(int i=0;i<rowspan;i++){ for(int j=0;j<colspan;j++){ if(i!=0||j!=0){ text=""; } Label label = new Label(realColNum+j,realRowNum+i,text); WritableFont countents = new WritableFont(WritableFont.TIMES,10); // 设置单元格内容，字号12 WritableCellFormat cellf = new WritableCellFormat(countents ); cellf.setAlignment(jxl.format.Alignment.CENTRE);//把水平对齐方式指定为居中 cellf.setWrap(true); //设置自动换行 cellf.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);//把垂直对齐方式指定为居 label.setCellFormat(cellf); sheet.addCell(label); rowhb[realRowNum+i][realColNum+j]=1; } } sheet.mergeCells(realColNum,realRowNum, realColNum+colspan-1,realRowNum+rowspan-1); } public static int getRealColNum(int[][] rowhb,int i,int realColNum){ while(rowhb[i][realColNum]!=0){ realColNum++; } return realColNum; } ///根据colgroups设置表格的列宽 public static void setColWidth(Elements colgroups,WritableSheet sheet){ if(colgroups.size()>0){ Element colgroup=colgroups.get(0); Elements cols=colgroup.getElementsByTag("col"); for(int i=0;i<cols.size();i++){ Element col=cols.get(i); String strwd=col.attr("width"); if(col.attr("width")!=""){ int wd=Integer.parseInt(strwd); sheet.setColumnView(i,wd/8); } } } } ///根据获取到的th设置表格的列宽 public static void setColWidthByThs(Elements ths,WritableSheet sheet){ if(ths.size()>0){ for(int i=0;i<ths.size();i++){ Element th = ths.get(i); String strwd= th.attr("width"); if(th.attr("width")!=""){ int wd=Integer.parseInt(strwd); sheet.setColumnView(i,wd/8); } /*int colspanNum = 0; if(th.attr("width")!=""){ int wd=Integer.parseInt(strwd); if(th.attr("colspan")!=""){ int colspan = Integer.parseInt(th.attr("colspan")); for(int j=0;j<colspan;j++){ sheet.setColumnView(i+j,wd/(8+colspan)); } colspanNum += colspan; }else{ sheet.setColumnView(i+colspanNum,wd/8); } }*/ } } } //toExcel是根据html文件地址生成对应的xls public static void toExcelByFileName(String fileName,String excelName)throws IOException{ Document doc=getDoc(fileName); String title = doc.title(); ///得到样式，以后可以根据正则表达式解析css，暂且没有找到cssparse Elements style= doc.getElementsByTag("style"); ///得到Table，demo只演示输入一个table，以后可以用循环遍历tables集合输入所有table Elements tables= doc.getElementsByTag("TABLE"); if(tables.size()==0){ return; } Element table=tables.get(0); //得到所有行 Elements trs = table.getElementsByTag("tr"); ///得到列宽集合 Elements colgroups=table.getElementsByTag("colgroup"); try { //文件保存到classpath目录下面 String path=HtmlToExcelUtil.class.getResource("/").getPath(); path+=excelName+".xls"; System.out.println(path); WritableWorkbook book = Workbook.createWorkbook(new File(path)); WritableSheet sheet = book.createSheet("人事关系", 0); setColWidth(colgroups,sheet); mergeColRow(trs,sheet); book.write(); book.close(); } catch (RowsExceededException e) { e.printStackTrace(); } catch (WriteException e) { e.printStackTrace(); } } /** * 根据html内容生成对应的xls * TODO * @param htmlStr * @param excelName * @param sheetName * @return * @throws IOException * 2017-11-8 wanghui */ public static AjaxValidate toExcelByHtmlStr(HttpServletResponse response,String htmlStr,String excelName,String sheetName)throws IOException{ OutputStream out = new BufferedOutputStream(response.getOutputStream()); Document doc= getDocByHtmlStr(htmlStr); String title = doc.title(); ///得到样式，以后可以根据正则表达式解析css，暂且没有找到cssparse Elements style= doc.getElementsByTag("style"); ///得到Table，demo只演示输入一个table，以后可以用循环遍历tables集合输入所有table Elements tables= doc.getElementsByTag("TABLE"); if(tables.size()==0){ return new AjaxValidate("",false,""); } Element table=tables.get(0); //得到所有行 Elements trs = table.getElementsByTag("tr"); ///得到列宽集合 Elements colgroups=table.getElementsByTag("colgroup"); try { //文件保存到classpath目录下面 String path = HtmlToExcelUtil.class.getResource("/").getPath()+excelName+".xls"; System.out.println(path); WritableWorkbook book = Workbook.createWorkbook(new File(path)); WritableSheet sheet = book.createSheet(sheetName, 0); setColWidth(colgroups,sheet); mergeColRow(trs,sheet); book.write(); book.close(); return new AjaxValidate("",true,path); } catch (RowsExceededException e) { e.printStackTrace(); return new AjaxValidate("",false,""); } catch (WriteException e) { e.printStackTrace();