使用JasperPrintManager.printReport打印jasper报告时出错（print，true）;

Question

下面这是我的代码： -

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); 

我要打印的页面碧玉。在使用“JasperPrintManager.printReport（print，false）”时没有任何问题，但是当我使用“true”时，出现以下错误。

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

重要的是要明白的是，它不是与

JasperPrintManager.printReport(print, false) 

它实际上是打印到您的首选打印机服务器打印的浏览器，因此，网络用户将总是打印服务器打印机（不在他自己的打印机上）。

这就是为什么

JasperPrintManager.printReport(print, true) 

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

直接在客户端打印机上打印（不包括开发需要在客户端浏览器上安装的浏览器插件）是不可能的。如果没有特殊的插件可能会导致我们的打印机整天都在打印垃圾邮件。

关闭你可以得到的是将报告导出到浏览器，然后自动打开打印对话框。

这是一个输出为pdf的示例：Automatically open the printer dialog after providing PDF download