使用JasperPrintManager.printReport打印jasper報告時出錯（print，true）;

Question

下面這是我的代碼： -

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); 

我要打印的頁面碧玉。在使用「JasperPrintManager.printReport（print，false）」時沒有任何問題，但是當我使用「true」時，出現以下錯誤。

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，它不是與

JasperPrintManager.printReport(print, false) 

它實際上是打印到您的首選打印機服務器打印的瀏覽器，因此，網絡用戶將總是打印服務器打印機（不在他自己的打印機上）。

這就是爲什麼

JasperPrintManager.printReport(print, true) 

不工作，你不能告訴服務器打開PrintDialog。此調用用於桌面應用程序。

直接在客戶端打印機上打印（不包括開發需要在客戶端瀏覽器上安裝的瀏覽器插件）是不可能的。如果沒有特殊的插件可能會導致我們的打印機整天都在打印垃圾郵件。

關閉你可以得到的是將報告導出到瀏覽器，然後自動打開打印對話框。

這是一個輸出爲pdf的示例：Automatically open the printer dialog after providing PDF download