First of all, we should click a button or some pic to trigger the action of exporting,here I used a button:
<input type="button" value="Export" onclick="export()" class="buttoncss"/>
Then the export function should like:
window.location.href="*.do?method=exportList"
whick the method used for achieve the data that need exported.
List excelList = getPrintService().queryTask(ref, type, taskName,level);//data content List<String> listHeader = new ArrayList<String>();//head of the data listHeader.add("Reference"); listHeader.add("TaskName"); request.setAttribute("listHeader", listHeader); request.setAttribute("excelList", excelList);
then mapping this action to this jsp:
<%@page language="java" import="java.util.List, com.alba.util.ExcelBean, com.alba.util.DateUtil" pageEncoding="UTF-8" %> <% response.setContentType("text/plain");//set as a txt document response.setHeader("Content-Disposition", "attachment;filename=" + new String(("PrintTask_" + DateUtil.formatFullDate(new java.util.Date().getTime()) + ".txt").getBytes(), "iso-8859-1"));//save as a attachment ExcelBean eb = new ExcelBean(); List<String> listHeader= (List<String>)request.getAttribute("listHeader"); List excelList= (List)request.getAttribute("excelList"); try{ eb.exportTask(response.getOutputStream(),excelList,listHeader);//exporting method }catch(Exception e){ e.printStackTrace(); } out.clear(); out = pageContext.pushBody();//save the object 'Out' and refresh %>
then the exportTask method is:
public void exportTask(OutputStream os,List excelList,List<String> listHeader){ OutputStreamWriter fw = new OutputStreamWriter(os); StringBuffer row = null; if(fw != null){ row = new StringBuffer(); for(int i=0;i<listHeader.size();i++){ if(i!=listHeader.size()-1){ row.append(listHeader.get(i)+"\t"); }else{ row.append(listHeader.get(i)+"\n"); } } try { fw.write(row.toString()); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } //add the contend if(excelList!=null&&excelList.size()>0){ for(int i=0;i<excelList.size();i++){ row = new StringBuffer(); PrintTask task = (PrintTask) excelList.get(i); String reference = task.getProjectprint().getProject().getReference()!=null?task.getProjectprint().getProject().getReference()+"\t":"\t"; String level = getLevelValue(task.getLevel()!=null?task.getLevel():0); String status = getStatusValue(task.getProjectprint().getStatus()!=null?task.getProjectprint().getStatus():10); row.append(reference) .append(task.getTaskname()!=null?task.getTaskname()+"\t":"\t") .append(task.getProjectprint().getType()!=null?task.getProjectprint().getType()+"\t":"\t") .append(task.getProjectprint().getDestination()!=null?task.getProjectprint().getDestination()+"\t":"\t") .append(task.getProjectprint().getProject().getDescription()!=null?task.getProjectprint().getProject().getDescription()+"\t":"\t") .append(task.getProjectprint().getProject().getPlanWeekToShow()!=null?task.getProjectprint().getProject().getPlanWeekToShow()+"\t":"\t") .append(level+"\t") .append(task.getNeededtime()!=null?task.getNeededtime()+"\t":"\t") .append(status+"\n"); try { fw.write(row.toString()); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } try { fw.flush(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
when we want to export as a excel file,we can use this method and do some changes like export txt file is ok:
public void exportExcelByJxl(List excelList,List<String> listHeader){ WritableWorkbook wwb = null; try { File fileName = new File("d:/PrintList/"); if(!fileName.exists()){ fileName.mkdirs(); } Date date = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss"); wwb = Workbook.createWorkbook(new File("d:/PrintList/PrintList"+sdf.format(date)+".xls")); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } //add the header if(wwb != null){ WritableSheet ws = wwb.createSheet("test", 0); for(int i=0;i<listHeader.size();i++){ Label labelC = new Label(i, 0, listHeader.get(i)); try { ws.addCell(labelC); } catch (RowsExceededException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (WriteException e) { // TODO Auto-generated catch block e.printStackTrace(); } } //add the contend if(excelList!=null&&excelList.size()>0){ for(int i=0;i<excelList.size();i++){ for(int j=0;j<listHeader.size();j++){ ProjectPrint print = (ProjectPrint) excelList.get(i); Label labelC = null; if(print == null){ labelC = new Label(j,i+1,""); }else{ String reference = ""; String cusName = ""; String mark = getMarkValue(print.getMarked()); String revise = getReviseValue(print.getRevised()); String status = getStatusValue(print.getStatus()); if(print.getMarked()!=2){ reference = print.getProject().getReference()!=null?print.getProject().getReference():""; cusName = print.getProject().getCustomerName()!=null?print.getProject().getCustomerName():""; } switch(j){ case 0 : labelC = new Label(j,i+1,print.getId()!=null? print.getId()+"" :"");break; case 1 : labelC = new Label(j,i+1,reference);break; case 2 : labelC = new Label(j,i+1,print.getType()!=null?print.getType():"");break; case 3 : labelC = new Label(j,i+1,print.getInkMaterial1()!=null?print.getInkMaterial1():"");break; case 4 : labelC = new Label(j,i+1,print.getSurfaceMaterial()!=null?print.getSurfaceMaterial():"");break; case 5 : labelC = new Label(j,i+1,print.getProject().getPlanWeekToShow()!=null?print.getProject().getPlanWeekToShow():"");break; case 6 : labelC = new Label(j,i+1,cusName);break; case 7 : labelC = new Label(j,i+1,print.getProject().getDescription()!=null?print.getProject().getDescription():"");break; case 8 : labelC = new Label(j,i+1,print.getNumberofPage()!=null?print.getNumberofPage()+"":"");break; case 9 : labelC = new Label(j,i+1,mark);break; case 10 : labelC = new Label(j,i+1,revise);break; case 11 : labelC = new Label(j,i+1,status);break; default : break; } } try { ws.addCell(labelC); } catch (RowsExceededException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (WriteException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } try { wwb.write(); wwb.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (WriteException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }