ireport相关之jasper

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ireport是工具，jasper才是核心。没有ireport也可以做报表（熟悉jasper报表xml格式即可）。
        很自然地，那么多的资料，哪里的最好？当然是jasper开源的例子最好！
        有关资源可以到http://jasper.sourceforge.net/下载
         https://sourceforge.net/projects/jasper/  提供比较可靠的下载
         https://jasper.svn.sourceforge.net/svnroot/jasper/ 提供比较新的下载。

         目前他们提供的svn帐号是anonsvn/anonsvn

 

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         有许多的例子，看了之后，就会豁然开朗。
         因为有太多的例子，现在有50个左右，逐一介绍是没有必要的。
         其中有四个是比较值得看的：
         1）datasource, 学习定制自己的JRdatasource
         2)  一个是jasper,可以了解如何操纵jasper文件
         3) 一个是webapp，如何实现网络打印jrprint文件或者数据流。
         4) CHARTS,有关于所有chart的示例。
         这其中，大部分的代码是类似的。
         通过java开发工具netbeans或者eclipse或者jbuilder可以查看 jasperreports-3.0.0.jar,jasperreports-3.0.0-applet.jar所包含的类的内容，具体需要什么版本，可以到相关网站下载。        
         最后，把比较有代表性的抄录如下：
        

 

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public static void main(String[] args)
    {
        if(args.length == 0)
        {
            usage();
            return;
        }
                
        String taskName = args[0];
        String fileName = args[1];

        try
        {
            long start = System.currentTimeMillis();
            if (TASK_FILL.equals(taskName))
            {
                JasperFillManager.fillReportToFile(fileName, null, new JREmptyDataSource());
                System.err.println("Filling time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_PRINT.equals(taskName))
            {
                JasperPrintManager.printReport(fileName, true);
                System.err.println("Printing time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_PDF.equals(taskName))
            {
                File sourceFile = new File(fileName);

                JasperPrint jasperPrint = (JasperPrint)JRLoader.loadObject(sourceFile);

                File destFile = new File(sourceFile.getParent(), jasperPrint.getName() + ".pdf");

                JRPdfExporter exporter = new JRPdfExporter();

                HashMap fontMap = new HashMap();
                FontKey key = new FontKey("DejaVu Serif", true, false);
                PdfFont font = new PdfFont("DejaVuSerif-Bold.ttf", "Cp1252", true);
                fontMap.put(key, font);

                exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
                exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, destFile.toString());
                exporter.setParameter(JRExporterParameter.FONT_MAP, fontMap);

                exporter.exportReport();

                System.err.println("PDF creation time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_XML.equals(taskName))
            {
                JasperExportManager.exportReportToXmlFile(fileName, false);
                System.err.println("XML creation time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_XML_EMBED.equals(taskName))
            {
                JasperExportManager.exportReportToXmlFile(fileName, true);
                System.err.println("XML creation time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_HTML.equals(taskName))
            {
                File sourceFile = new File(fileName);

                JasperPrint jasperPrint = (JasperPrint)JRLoader.loadObject(sourceFile);

                File destFile = new File(sourceFile.getParent(), jasperPrint.getName() + ".html");

                JRHtmlExporter exporter = new JRHtmlExporter();

                HashMap fontMap = new HashMap();
                fontMap.put("sansserif", "DejaVu Sans, Arial, Verdana");
                fontMap.put("serif", "DejaVu Serif, Times New Roman");
                fontMap.put("monospaced", "DejaVu Sans Mono, Courier, Courier New");

                exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
                exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, destFile.toString());
                exporter.setParameter(JRExporterParameter.FONT_MAP, fontMap);

                exporter.exportReport();

                System.err.println("HTML creation time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_RTF.equals(taskName))
            {
                File sourceFile = new File(fileName);
        
                JasperPrint jasperPrint = (JasperPrint)JRLoader.loadObject(sourceFile);
        
                File destFile = new File(sourceFile.getParent(), jasperPrint.getName() + ".rtf");
                
                HashMap fontMap = new HashMap();
                fontMap.put("sansserif", "DejaVu Sans");
                fontMap.put("serif", "DejaVu Serif");
                fontMap.put("monospaced", "DejaVu Sans Mono");

                JRRtfExporter exporter = new JRRtfExporter();
                
                exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
                exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, destFile.toString());
                exporter.setParameter(JRExporterParameter.FONT_MAP, fontMap);
                
                exporter.exportReport();

                System.err.println("RTF creation time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_XLS.equals(taskName))
            {
                File sourceFile = new File(fileName);
        
                JasperPrint jasperPrint = (JasperPrint)JRLoader.loadObject(sourceFile);
        
                File destFile = new File(sourceFile.getParent(), jasperPrint.getName() + ".xls");
                
                JRXlsExporter exporter = new JRXlsExporter();
                
                HashMap fontMap = new HashMap();
                fontMap.put("sansserif", "DejaVu Sans");
                fontMap.put("serif", "DejaVu Serif");
                fontMap.put("monospaced", "DejaVu Sans Mono");

                exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
                exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, destFile.toString());
                exporter.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET, Boolean.FALSE);
                exporter.setParameter(JRExporterParameter.FONT_MAP, fontMap);

                exporter.exportReport();

                System.err.println("XLS creation time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_JXL.equals(taskName))
            {
                File sourceFile = new File(fileName);

                JasperPrint jasperPrint = (JasperPrint)JRLoader.loadObject(sourceFile);

                File destFile = new File(sourceFile.getParent(), jasperPrint.getName() + ".jxl.xls");

                JExcelApiExporter exporter = new JExcelApiExporter();

                HashMap fontMap = new HashMap();
                fontMap.put("sansserif", "DejaVu Sans");
                fontMap.put("serif", "DejaVu Serif");
                fontMap.put("monospaced", "DejaVu Sans Mono");

                exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
                exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, destFile.toString());
                exporter.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET, Boolean.TRUE);
                exporter.setParameter(JRExporterParameter.FONT_MAP, fontMap);

                exporter.exportReport();

                System.err.println("XLS creation time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_CSV.equals(taskName))
            {
                File sourceFile = new File(fileName);
        
                JasperPrint jasperPrint = (JasperPrint)JRLoader.loadObject(sourceFile);
        
                File destFile = new File(sourceFile.getParent(), jasperPrint.getName() + ".csv");
                
                JRCsvExporter exporter = new JRCsvExporter();
                
                exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
                exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, destFile.toString());
                
                exporter.exportReport();

                System.err.println("CSV creation time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_ODT.equals(taskName))
            {
                File sourceFile = new File(fileName);
        
                JasperPrint jasperPrint = (JasperPrint)JRLoader.loadObject(sourceFile);
        
                File destFile = new File(sourceFile.getParent(), jasperPrint.getName() + ".odt");
                
                JROdtExporter exporter = new JROdtExporter();
                
                exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);
                exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, destFile.toString());
                
                exporter.exportReport();

                System.err.println("ODT creation time : " + (System.currentTimeMillis() - start));
            }
            else if (TASK_RUN.equals(taskName))
            {
                JasperRunManager.runReportToPdfFile(fileName, null, new JREmptyDataSource());
                System.err.println("PDF running time : " + (System.currentTimeMillis() - start));
            }
            else
            {
                usage();
            }
        }
        catch (JRException e)
        {
            e.printStackTrace();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }