ssm框架用jasperreport导出pdf报表

Question

List l=userservice.selectl();
JasperPrint jasperPrint;
JRDataSource jrDataSource;
//1.读取.japser文件，构建输入流
String jasperpath="C://Users/qw/JaspersoftWorkspace/one/j/Blank_A4.jasper";
InputStream in = new FileInputStream(new File(jasperpath));

            try{                    
                jrDataSource=new JRBeanCollectionDataSource(l);

// JasperReport jasperReport=JasperCompileManager.compileReport("C://Users/qw/JaspersoftWorkspace/one/j/Blank_A4.jrxml");
jasperPrint=JasperFillManager.fillReport(in,null,jrDataSource);
JasperExportManager.exportReportToPdfStream(jasperPrint,response.getOutputStream());

                response.getOutputStream().flush();
                response.getOutputStream().close();

            }catch(Exception e){
                e.printStackTrace();
            }

```用的是javabean作为数据源，但是pdf报表一直都只显示一条数据

Answer 1

首先看看List l=userservice.selectl();该代码有几条数据，再看看模板是不是也有问题？导出数据可用参考

 List<Map> list = new ArrayList();
    Map dataMap = new HashMap();
    dataMap .put("name","张三");
    dataMap .put("address","南京");
    dataMap .put("email","[e-mail]");
    list.add(dataMap);
    JasperPrint jasperPrint =  JasperFillManager.fillReport(jasperPath, 
                                     paramters, 
                                     new JRBeanCollectionDataSource(list));