使用 JasperPrintManager.printReport(print, true) 打印碧玉报告时出错；

Question

下面是我的代码：-

Map parameters = new HashMap();
parameters.put("printer", "1010111");
FileInputStream file = new FileInputStream(new File(getServletContext().getRealPath("/Reports/report1.jasper")));
JasperPrint print = JasperFillManager.fillReport(file, parameters, new JRBeanCollectionDataSource(reports));
JasperPrintManager.printReport(print, true);

我正在尝试打印碧玉页面。使用“JasperPrintManager.printReport(print, false)”时我没有任何问题，但是当我使用“true”时，我收到以下错误。

Severe:   net.sf.jasperreports.engine.JRException: Error printing report.
at net.sf.jasperreports.engine.print.JRPrinterAWT.printPages(JRPrinterAWT.java:214)
at net.sf.jasperreports.engine.JasperPrintManager.print(JasperPrintManager.java:242)
at net.sf.jasperreports.engine.JasperPrintManager.print(JasperPrintManager.java:129)
at net.sf.jasperreports.engine.JasperPrintManager.printReport(JasperPrintManager.java:326)
at Reports.Closing_Report_Report.doGet(Closing_Report_Report.java:73)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.awt.HeadlessException
    at sun.awt.windows.WPrinterJob.printDialog(WPrinterJob.java:576)
    at net.sf.jasperreports.engine.print.JRPrinterAWT.printPages(JRPrinterAWT.java:198)
    ... 33 more

Answer 1

重要的是要了解它不是正在打印的浏览器

JasperPrintManager.printReport(print, false)

它实际上是打印到您首选打印机的服务器，因此网络用户将始终在服务器打印机上打印（而不是在他自己的打印机上）。

这就是为什么

JasperPrintManager.printReport(print, true)

不起作用，你不能告诉服务器打开PrintDialog。此调用用于桌面应用程序。

不能直接在客户端打印机上打印（不包括开发需要安装在客户端浏览器上的浏览器插件）。如果这在没有特殊插件的情况下是可能的，我们的打印机将整天打印垃圾邮件。

您可以获得的关闭是将报告导出到浏览器，然后自动打开打印对话框。

这是导出为 pdf 的示例：Automatically open the printer dialog after providing PDF download