Question

我正在使用 JasperReports API 从我的 Java 应用程序进行打印。我正在打印这样的报告：

public void prints(String billNo, String fileName, String outFileName, String perameterName) {
    HashMap hm = new HashMap();
    hm.put(perameterName, billNo);
    //Here parameterName is the parameter in JasperReport.
    // billNo is the value from my java application.

    try {
        conn = new connection().db();
        PrinterJob job = PrinterJob.getPrinterJob();
        /* Create an array of PrintServices */
        PrintService[] services = PrintServiceLookup.lookupPrintServices(null, null);
        PrintService default_service = PrintServiceLookup.lookupDefaultPrintService();
        int selectedService = 0;
        /* Scan found services to see if anyone suits our needs */
        for (int i = 0; i < services.length; i++) {
            if (services[i].getName().toUpperCase().equals(default_service.getName().toUpperCase())) {
                selectedService = i;
            }
        }
        job.setPrintService(services[selectedService]);
        PrintRequestAttributeSet printRequestAttributeSet = new HashPrintRequestAttributeSet();
        printRequestAttributeSet.add(MediaSizeName.ISO_A4);
        printRequestAttributeSet.add(new Copies(1));
        JRPrintServiceExporter exporter;
        exporter = new JRPrintServiceExporter();

        JasperPrint print = JasperFillManager.fillReport(fileName, hm, conn);
        JRExporter exporterr = new JRPdfExporter();
        exporterr.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, outFileName);
        exporterr.setParameter(JRExporterParameter.JASPER_PRINT, print);

        exporter.setParameter(JRExporterParameter.JASPER_PRINT, print);
        exporter.setParameter(JRPrintServiceExporterParameter.PRINT_SERVICE, services[selectedService]);
        exporter.setParameter(JRPrintServiceExporterParameter.PRINT_SERVICE_ATTRIBUTE_SET, services[selectedService].getAttributes());
        exporter.setParameter(JRPrintServiceExporterParameter.PRINT_REQUEST_ATTRIBUTE_SET, printRequestAttributeSet);
        exporter.setParameter(JRPrintServiceExporterParameter.DISPLAY_PAGE_DIALOG, Boolean.FALSE);
        exporter.setParameter(JRPrintServiceExporterParameter.DISPLAY_PRINT_DIALOG, Boolean.FALSE);
        exporter.exportReport();
        exporterr.exportReport();
    } catch (JRException e) {
        JOptionPane.showMessageDialog(null, e);
    } catch (Exception e) {
        JOptionPane.showMessageDialog(null, "Printer not connected. Check power cable.");
    }
}

我用来在其他类中调用此方法但是如何传递多个参数和多个值来报告？例如查询：

"select * from table1 where date>"+thisDate+" and date<"+thatDate+" "

如何从 Java 应用程序发送 thisDate 和 thatDate ？

Answer 1

由于您使用的是HashMap，因此您可以存储许多值。你可以这样做：

HashMap hm = new HashMap();  
hm.put(perameterName, billNo);
hm.put("thisDate", thisDate);
hm.put("theDate", theDate);
hm.put("anotherParam", paramValue);

如果您不希望您的方法传递如此多的键和值作为参数，您只需将“hm”对象传递给您的方法：

public void prints(  String fileName, String outFileName, HashMap hm){

JasperReports API：如何传递多个参数进行报告

1 个答案: