Java JasperReport，显示和打印报告
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4265401/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
JasperReport, show and print report
提问by blow
I exported a .jrprint file created with iReport. Now I want to preview the report and finally print it, how can I do this?
我导出了一个用 iReport 创建的 .jrprint 文件。现在我想预览报告并最终打印它，我该怎么做？
I'm trying with:
我正在尝试：
JRBeanCollectionDataSource ds=new JRBeanCollectionDataSource(list);
JasperPrint jrprint=JasperFillManager.fillReport("report.jrprint", null, ds);
But I have this exception
但我有这个例外
java.lang.ClassCastException: net.sf.jasperreports.engine.JasperPrint cannot be cast to net.sf.jasperreports.engine.JasperReport
回答by Ziagl
if you want to print a JasperReport you have to call the fillReport with a JasperReport file (*.jasper).
如果要打印 JasperReport，则必须使用 JasperReport 文件 (*.jasper) 调用 fillReport。
If you want to get an PDF file you may use following source:
如果您想获得 PDF 文件，您可以使用以下来源：
JRPdfExporter exporter = new JRPdfExporter();
exporter.setParameter(JRExporterParameter.JASPER_PRINT, jp);
exporter.setParameter(JRExporterParameter.OUTPUT_FILE, outFile);
exporter.exportReport();
jp is here your *.jrprint file.
jp 在这里是您的 *.jrprint 文件。
回答by Kieveli
You're specifying the JasperPrint file and not the JasperReport file. Let me break down the files and what they are:
您指定的是 JasperPrint 文件而不是 JasperReport 文件。让我分解文件和它们是什么：
- report.jrxml - An xml definition of a jasper report - this defines a report, but cannot be used directly to generate output.
- report.jasper - A compiled jrxml file (JasperReport). This can be used as input to fill the report with data.
- report.jprint - A report that's been filled with data, and is ready to be exported to multiple output formats
- report.jrxml - jasper 报告的 xml 定义 - 这定义了一个报告，但不能直接用于生成输出。
- report.jasper - 编译后的 jrxml 文件 (JasperReport)。这可以用作用数据填充报告的输入。
- report.jprint - 已填充数据并准备导出为多种输出格式的报告
Here's some code to start with the jrxml file the designer creates to get you to an printed pdf output:
下面是一些代码，从设计者创建的 jrxml 文件开始，让您获得打印的 pdf 输出：
Connection connection = PersistenceSessionFactory.getSqlSession().getConnection();
JasperReport report = JasperCompileManager.compileReport( "FancyPantsReport.jrxml" );
// setup parameters for use with the report
HashMap<String, Object> params = new HashMap<String,Object>();
params.put( "sqlDate", fromDate );
// Fill the report data from the sql connection and parameters
JasperPrint printedReport = JasperFillManager.fillReport(report, params, connection);
String outputFilename = "FancyPants-" + dateString + ".pdf";
JasperExportManager.exportReportToPdfFile( printedReport, outputFilename );
LOG.info("Report Generated in " + (System.currentTimeMillis() - start) + "ms");
Notice it uses the compile to get a JasperReport from the jrxml, then the FillManager to get a JasperPrint from the JasperReport, and finally exports the JasperPrint to pdf.
注意它使用 compile 从 jrxml 中获取 JasperReport，然后使用 FillManager 从 JasperReport 中获取 JasperPrint，最后将 JasperPrint 导出为 pdf。
回答by user3249098
You can use the following to produce and print the report:
您可以使用以下内容来生成和打印报告：
JRBeanCollectionDataSource dataSource = new JRBeanCollectionDataSource(list);
InputStream jasperStream = YourClass.class.getResourceAsStream(TEMPLATE_BASE_PATH);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperStream, parameters, dataSource);
JasperViewer viewer = new JasperViewer(jasperPrint, false);
viewer.setVisible(true);
回答by chalitha geekiyanage
You can use Jasper viewer to preview reports and print it.
您可以使用 Jasper 查看器来预览和打印报告。
Here is an example!
这是一个例子！
public void generateReport() throws PrinterException {
try {
String sourceFileName = "src/bill/report.jasper";
String printFileName = null;
Purchase_BeanFactory DataBean = new Purchase_BeanFactory();
JRBeanCollectionDataSource beanColDataSource = new JRBeanCollectionDataSource(DataBean.generateCollection());
Map parameters = new HashMap();
printFileName = JasperFillManager.fillReportToFile(
sourceFileName,
parameters,
beanColDataSource);
JasperViewer jv=new JasperViewer("src/bill/report.jrprint", false, false);
//set title for the jasper viewer
jv.setTitle("Your Title");
jv.setVisible(true);
//set icon to the jasper viewer
jv.setIconImage(
(new
ImageIcon(getClass().getResource("path/to/image.png")).getImage()));
} catch (Exception e) {
System.out.println("e");
}
}
