Ireport子报表总结
实现效果：点击导出后弹出下载框
入口：
public ActionForward printVoucher(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws SystemException {
HttpSession session = request.getSession();
Hotelbookheader hbh = (Hotelbookheader)session.getAttribute("adminHotelbookheaderDetails");
String type = request.getParameter("type");
log.info("Test output !");
byte[] voucher = null;
DynaActionForm updateBookingForm = (DynaActionForm)form;
if(type != null && "agent".equalsIgnoreCase(type)) {
hbh = (Hotelbookheader)session.getAttribute("HotelbookheaderDetails");
voucher = this.initVoucherPDF(hbh,session,response,updateBookingForm);
if(voucher != null) {
this.toPdfbytes(response, voucher, "voucher.pdf");
}
request.setAttribute(MyConstants.MARKETS_KEY, "Save voucher success");
return mapping.findForward("admindetails");
}
hbh.setVoucherRemarks(updateBookingForm.getString("voucherRemarks"));
hbh.setIsAllowAgentReprint(new Byte(updateBookingForm.getString("isAllowAgentReprint")));
hbh.setRemarks(updateBookingForm.getString("voucherRemarks"));
String voucherno = updateBookingForm.getString("voucherno");
String agentxonumber = updateBookingForm.getString("agentxonumber");
AmendBookLogUtils logUtils = new AmendBookLogUtils(request);
logUtils.log("Voucher","Voucher Issued", hbh.getBookingno(), "");
//生成pdf
if("dataOnly".equals(updateBookingForm.getString("isPdf"))) {
voucher = this.initBlankVoucherPDF(hbh,session,response,updateBookingForm);
}
if("withBackground".equals(updateBookingForm.getString("isPdf"))){
voucher = this.initVoucherPDF(hbh,session,response,updateBookingForm);
}
if(voucher != null) {
this.toPdfbytes(response, voucher, "voucher.pdf");
hbh.setStatus(MyConstants.Guarantee);
}
hotelbookheaderFacade.update(hbh);
request.setAttribute(MyConstants.MESSAGE_KEY, "Save voucher success");
return mapping.findForward("admindetails");
}private void toPdfbytes(HttpServletResponse response,byte[] bb,String filename) throws SystemException {
response.reset();
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition","attachment; filename=\"" + filename + "\"");
response.setContentLength(bb.length);
try {
ServletOutputStream ouputStream = response.getOutputStream();
ouputStream.write(bb, 0, bb.length);
ouputStream.flush();
ouputStream.close();
} catch (IOException e) {
e.printStackTrace();
throw new SystemException(e.getMessage());
}
}关键地方：
private byte[] initBlankVoucherPDF(Hotelbookheader hbh,HttpSession session,HttpServletResponse response,DynaActionForm updateBookingForm) throws SystemException {
String path = "WebRoot/images";
if(session != null)
path = session.getServletContext().getRealPath("images");
log.info(path);
Map readMap = updateBookingForm.getMap();
List<Map<Object, Object>> mapList = new ArrayList<Map<Object,Object>>();
Map<Object, Object> map = new HashMap<Object, Object>();
map.put("neHotelLogo",path + "\\voucher\\NE_hotel_logo.jpg");
map.put("neVoucherLogo",path + "\\voucher\\booking.jpg");
map.put("roomMessage", roomMessage);
map.put("extraBed", "Nil");
//构造两个子报表
map.put("passengerList", paxList(hbh,map));
map.put("items", itemsList(hbh,updateBookingForm));
//mapList是fillReport时的数据源 new JRBeanCollectionDataSource(mapList)
mapList.add(map);
try {
byte[] bb = JasperReportUtil.createPdfByXmlName("ServiceVoucher", mapList, session);
return bb;
} catch (JRException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}数据源是new JRBeanCollectionDataSource(mapList) ，参数是一个List，List中封装了一个Map，基本数据都放在这个Map中
子报表数据分别放入对应的Map中，再将这些Map封装为一个List，传入数据源List的Map,如 map.put("passengerList", paxList(hbh,map))
子报表的数据封装：
private List itemsList(Hotelbookheader hbh,DynaActionForm updateBookingForm) {
Set priceDetailsSet = hbh.getHotelbookpricedetails();
List<HotelRoomPriceVO> list = AdminUpdateOrderUtils.initAdminUpdatePriceListVO(updateBookingForm,priceDetailsSet);
int num1 = 0;
int num2 = 0;
int num3 = 0;
for(int i =0;i<list.size();i++){
HotelRoomPriceVO vv = list.get(i);
if (vv.getAdditionalitem1paxno() != null
&& !vv.getAdditionalitem1paxno().equals("")) {
num1+=Integer.parseInt(vv.getAdditionalitem1paxno());
}
if (vv.getAdditionalitem2paxno() != null
&& !vv.getAdditionalitem2paxno().equals("")) {
num2+=Integer.parseInt(vv.getAdditionalitem2paxno());
}
if (vv.getAdditionalitem3paxno() != null
&& !vv.getAdditionalitem3paxno().equals("")) {
num3+=Integer.parseInt(vv.getAdditionalitem3paxno());
}
List lt = new ArrayList();
for(int i =0;i<3;i++){
HashMap m = new HashMap();
if(i==0){
m.put("name", list.get(0).getAdditionalitemname1());
m.put("num", num1);
}else if(i == 1){
m.put("name", list.get(0).getAdditionalitemname2());
m.put("num", num2);
}else{
m.put("name", list.get(0).getAdditionalitemname3());
m.put("num", num3);
}
lt.add(m);
}
return lt;
}
public static List<Map<Object, Object>> paxList(Hotelbookheader hbh,Map<Object, Object> map) {
List<Map<Object,Object>> mapList = new ArrayList<Map<Object, Object>>();
String roomtype = "";
String roomcount = "";
Set paxDetailsSet = hbh.getHotelbookpaxdetails();
for (Iterator iter1 = paxDetailsSet.iterator(); iter1.hasNext();) {
Map<Object, Object> paxMap = new HashMap<Object,Object>();
Hotelbookpaxdetail pax = (Hotelbookpaxdetail) iter1.next();
roomtype = pax.getRoomtype().trim();
paxMap.put("gender", pax.getGender() == null ? "" : pax.getGender());
paxMap.put("paxname", pax.getGivenname()+"/" + pax.getSurname());
//一排显示两个
if(iter1.hasNext()) {
Hotelbookpaxdetail pax1 = (Hotelbookpaxdetail) iter1.next();
paxMap.put("gender1", pax1.getGender() == null ? "" : pax1.getGender());
paxMap.put("paxname1", pax1.getGivenname()+"/" + pax1.getSurname());
}
mapList.add(paxMap);
}
return mapList;
}真正导出的部分：
导出Excel只需将JRPdfExporter exporter = new JRPdfExporter(); 换为JExcelApiExporter exporter = new JExcelApiExporter();即可！
public static byte[] createPdfByXmlName(String reportName, List<Map<Object,Object>> mapList,HttpSession session) throws JRException, IOException {
log.warn("enter createPdfByXmlName");
String path = "WebRoot/reports";
if (session != null) {
path = session.getServletContext().getRealPath("reports");
}
JasperReport jasperReport;
JasperPrint jasperPrint;
JRPdfExporter exporter = new JRPdfExporter();
ByteArrayOutputStream oStream = new ByteArrayOutputStream();
try {
File file = new File(path + "/" + reportName + ".jasper");
if (!file.exists()) {
JasperCompileManager.compileReportToFile(path + "/"+ reportName + ".jrxml",path + "/"+ reportName + ".jasper");
log.info(reportName + ".jrxml");
}
jasperReport = (JasperReport) JRLoader.loadObject(file);
Map tempMap = new HashMap();
tempMap.put("SUBREPORT_DIR", path + "/");
jasperPrint = JasperFillManager.fillReport(jasperReport, tempMap, new JRBeanCollectionDataSource(mapList));
exporter.setParameter(JRPdfExporterParameter.JASPER_PRINT, jasperPrint);
exporter.setParameter(JRPdfExporterParameter.CHARACTER_ENCODING,"UTF-8");
exporter.setParameter(JRPdfExporterParameter.OUTPUT_STREAM, oStream);
exporter.exportReport();
byte[] bytes = oStream.toByteArray();
oStream.close();
return bytes;
}catch(JRException e){
e.printStackTrace();
throw new JRException(e);
}
}Ireprot中：
上图指定子报表路径！
此处的$F{items}即为数据源List的Map中封装的子报表的List，与上面对应
另：此处必须使用JRBeanCollectionDataSource的全路径，否则会报错！
注意此处items字段的类型为java.util.ArrayList，如图：
注意地方：
子报表大小刚刚放下数据即可，不可留太多空白，子报表页面的大小就是它在父报表中所占的大小！
详细子报表还可参考网上的这个例子：
http://hi.baidu.com/q2881818/blog/item/765cefb3d79e13aed9335ab6.html
几个很有价值的子报表文章：
iReport 中父报表给子报表传参数
http://wenku.baidu.com/view/48c139ece009581b6bd9eb88.html
iReport 4.1 报表制作，子报表，实例解析
http://blog.****.net/q326527970/article/details/7049047
ireport 的一些技巧
http://azrael6619.iteye.com/blog/753877