Question

怎样实现JasperReport循环打印 or 多表打印

Answer 1

我用的是FineReport，比较方便，jasperreport不太了解。下面是百度的答案，希望对你有帮助。
批量导出思路如下：
1、数据库里面取出数据
2、调用项目工具类中生成报表打印数据的方法(每张表数据都要放到一个list集合中)

java 代码
String path = this.getClass().getResource("/").getPath();
path = path.substring(1,path.lastIndexOf("classes"));
String fileName = path+"jasperreport"+"\"+reportFileName+".jasper";
System.out.println("_________ FileName:"+fileName);

//装载jasper文件application
File reportFile = new File(fileName);
Map map = new HashMap();
JasperReport jasperReport = null;
DateFormat format1 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String s = format1.format(new Date());

//取得JasperPrint 的集合
for (Object e : list) {
List<Evaluate> tempList = new ArrayList<Evaluate>();
tempList.add((Evaluate)e);
jasperPrint = JasperFillManager.fillReport(reportFile.getPath(),null,
new JRBeanCollectionDataSource(tempList));
list2.add(jasperPrint);
}

//生成报表数据并填入OutputStream
JRPdfExporter exporter=new JRPdfExporter ();
ServletOutputStream output = null;
try {

output = getResponse().getOutputStream();
getResponse().setHeader("Content-disposition","attachment; filename="+exportFileName+s+".pdf");//exportFileName导出文件名字 s 表示年月日时分秒
exporter.setParameter(JRExporterParameter.JASPER_PRINT_LIST, list2);
exporter.setParameter(JRExporterParameter.OUTPUT_STREAM,output);
// exporter.setParameter(JRExporterParameter.JASPER_PRINT_LIST, list);
exporter.setParameter(JRExporterParameter.CHARACTER_ENCODING, "UTF-8");
exporter.exportReport();
} catch (Exception e) {
e.printStackTrace();
}