从零开始认识 JasperReport + IReport (JasperReport部分)

从零开始认识 JasperReport + IReport (JasperReport部分)

因参与公司南非的项目,需要应用在Linux平台,所以报表改用JasperReport.国内的项目报表还是用FastReport(看来还是结晶啊).废话少说,我从delphi平台转到RCP开发才不过两月时间,以前从未接触过JasperReport.(简称为JR)今天上级要求熟悉JR,为节后国际化报表做准备.以下为我从0开始的一些记录.目的: 力求理解JasterReport的各个概念及之间的关系.熟悉打印报表流程的来龙去脉,主要的调用方法(如加载报表,打印,预览).                报表设计器的使用.1. IReport 设计器,就像FastReport一样有这样的设计器.但名字叫IReprot,为安装文件,我安装的版本为    iReport-3.0.0-windows-installer.exe,同事传我的,下载地址百度下下就有了.2. JasperReport为一个开发Jar包,就是相当于FastReport的报表控件.3. 初始化JasterReport private static JasperPrint initJasperReport(String fileName,             Map<String, Object> paramMap, List data) throws IOException,            MalformedURLException, JRException {        ...        InputStream is = fullPathString.toURL().openStream();  //这句以上代码都是处理报表文件路径        JasperReport jasperReport = (JasperReport) JRLoader.loadObject(is);                Object[] objArray = data.toArray();        //JasperReport对象  + Map对象 + List 对象 =JasperPrint对象         final JasperPrint jasperPrint = JasperFillManager.fillReport(                jasperReport, paramMap, new JRBeanArrayDataSource(objArray));        return jasperPrint;    }      4.查找默认打印机(打印服务).public static boolean directPrintByPrintName(final JasperPrint jasperPrint) {        if (jasperPrint != null) {            try {                PrintService[] PSs = PrinterJob.lookupPrintServices(); //java.awt.*包.查找所有打印服务.                PrintService ps = null;                if (PSs != null &amp;&amp; PSs.length > 1&amp;&amp; !Assert.isNull(MzTransParam.PrinterOfSyddyj)) {                    for (int i = 0; i < PSs.length; i++) {                        String sps = PSs[i].toString();                        sps = sps.replace("Win32 Printer : ", ""); //$NON-NLS-1$ //$NON-NLS-2$                        //MzTransParam.PrinterOfSyddyj 我们系统设置的默认打印机名称.                        if (sps.equalsIgnoreCase(MzTransParam.PrinterOfSyddyj)) {                              ps = PSs[i];//得到打印服务对象                            break;                        }                    }                }5.设置打印参数,好多个参数                if (ps != null) {                    long start = System.currentTimeMillis();                    PrintRequestAttributeSet printRequestAttributeSet = new HashPrintRequestAttributeSet();                    printRequestAttributeSet.add(MediaSizeName.ISO_A5);// 处方模板是A5纸  第一个参数对象                        PrintServiceAttributeSet printServiceAttributeSet = new HashPrintServiceAttributeSet();                    printServiceAttributeSet.add(new PrinterName(ps.getName(),null)); //第二个参数对象                    final JRPrintServiceExporter exporter = new JRPrintServiceExporter(); //关键的对象,其它的对象都是为他服务的                    //以下为设置参数                    exporter.setParameter(JRExporterParameter.JASPER_PRINT,jasperPrint);                    exporter.setParameter(JRPrintServiceExporterParameter.PRINT_REQUEST_ATTRIBUTE_SET,                                    printRequestAttributeSet);                    exporter.setParameter(JRPrintServiceExporterParameter.PRINT_SERVICE_ATTRIBUTE_SET,                                    printServiceAttributeSet);                    exporter.setParameter(JRPrintServiceExporterParameter.DISPLAY_PAGE_DIALOG,                                    Boolean.FALSE);                    exporter.setParameter(JRPrintServiceExporterParameter.DISPLAY_PRINT_DIALOG,                                    Boolean.FALSE);6.关键的出场,在线程里导出报表.(打印)                Thread thread = new Thread(new Runnable() {                        public void run() {                            try {                                exporter.exportReport(); //就这么一句.exporter对象导出报表.                            } catch (Exception ex) {                                System.err.println(ex.getLocalizedMessage());                            }                        }                    });                    thread.start();7.采用默认打印.                } else { //此处的else接的是5条的if                     Thread thread = new Thread(new Runnable() {                        public void run() {                            try {                                //jasperPrint 对象就是JasperPrintManager生成的.参考上面的代码.                                JasperPrintManager.printReport(jasperPrint,false);  //这一句应该是默认打印.                            } catch (Exception ex) {                            }                        }                    });                    thread.start();                }            } catch (Exception ex) {                return false;            }        }        return true;}未完.