导出到.pdf JAVA时文件显示多个文件

Question

Hi I tried make a exporting data into .pdf, so when I view a "detail" it will show a set of data and on detail have an exporting into .pdf, when the data exporting into .pdf, the data will become a one file. But when I try to exporting the file more than one like this

enter image description here

but it's not the same data it's different data from database, and I want to ask how this can happened and how to fixed this ??

this the code on bean:

    @PostConstruct
public void init(){

    this.setLazyMasterReportDataModel(new LazyMasterReportDataModel()); 
}

public JasperPrint exportTo() {     
    if(this.listReportMaster == null || this.listReportMaster.isEmpty()){           
        FacesMessage messageFailed = new FacesMessage(FacesMessage.SEVERITY_INFO,"Info","No data found");           
        RequestContext.getCurrentInstance().showMessageInDialog(messageFailed);         
        return null;
    }
    String path = FacesContext.getCurrentInstance().getExternalContext().getRealPath("/resources/report/PRPKReportPDF.jasper");     
    JRBeanCollectionDataSource  beanCollectionDataSource = new JRBeanCollectionDataSource(this.listReportMaster);       
    try {           
        JasperPrint jasperPrint = JasperFillManager.fillReport(path, null, beanCollectionDataSource);           
        return jasperPrint;         
    } catch (JRException e) {           
        e.printStackTrace();
        return null;
    }
}   

public void exportToPdf(ActionEvent actionEvent){   
    if(this.lazyMasterReportDataModel != null){
        System.out.println("masuk exporttopdf");
        String sql = ((LazyMasterReportDataModel) this.lazyMasterReportDataModel).getSqlReportPrint();
        List<Object> listObject = ((LazyMasterReportDataModel) this.lazyMasterReportDataModel).getObjectSqlListReportPrint();
        this.listReportMaster = reportMasterPRPKController.getPRPKForReport(sql, listObject);           

        JasperPrint jasperPrint = exportTo();
        String fileName = "PRPKNew_Report".concat("_").concat(".pdf");
        if(jasperPrint != null) reportMasterPRPKController.exportToPDF(fileName, jasperPrint);
        else System.out.println("jasperprint null");
    }else{
        System.out.println("keluar exporttopdf");
        FacesMessage messageFailed = new FacesMessage(FacesMessage.SEVERITY_INFO,"Info","No data found");           
        RequestContext.getCurrentInstance().showMessageInDialog(messageFailed);
    }
}

this code on controller

public void exportToPDF(String fileName, JasperPrint jasperPrint){
    try{            
        System.out.println("masuk controller exportpdf");
        HttpServletResponse httpServletResponse = (HttpServletResponse)FacesContext.getCurrentInstance().getExternalContext().getResponse();
        httpServletResponse.addHeader("Content-disposition", "attachment; filename=".concat(fileName));
        ServletOutputStream servletOutputStream = httpServletResponse.getOutputStream();
        JasperExportManager.exportReportToPdfStream(jasperPrint, servletOutputStream);
        servletOutputStream.flush();
        servletOutputStream.close(); 
        FacesContext.getCurrentInstance().responseComplete();   
        System.out.println("selesai print");
    } catch (JRException | IOException e) {         
        e.printStackTrace();
    }       
}

thank's before

Answer 1

The variable listObject in exportToPdf method seems to contains the list of objects passed to the report generation.

For each of these objects, a detail band will be generated . If you have only one detail band and 100 objects in this list, 100 band will be generated in the pdf export.

I would advise you to only provide one object to your pdf generation if you want only one detail band to be displayed.

See this question about the detail band for more info