Jasper报告生成PDF然后Glassfish崩溃/关闭 [英] Jasper Report Generates a PDF and then Glassfish crashes/shutsdown

问题描述

我正在运行我在JSF / Java中开发的应用程序，当我让JasperReports ExporttoPDFFile开始工作并运行应用程序时，jrxml被编译并显示，然后导出到pdf文件，看起来与它完全一样应该和JSF返回正确的页面并加载，但Glassfish 3停止工作，我必须启动或重新启动它才能继续再次使用该应用程序，一切正常，直到JasperReports编译和导出...任何想法？

I am running an app I have developed in JSF/Java and as soon as I got JasperReports ExporttoPDFFile to start working and ran the app, the jrxml is compiled and displayed, then exported to a pdf file, that looks exactly as it should and the proper page is returned by the JSF and loads but then Glassfish 3 stops working and I have to start or restart it before I can continue to use the app again, everything works fine until the JasperReports compile and export... any ideas?

http://pastebin.com/mPwYvWh9 < ---运行/崩溃后的Glassfish服务器日志

http://pastebin.com/mPwYvWh9 <--- Glassfish server log after running/crashing

JSF PAGE

 <ui:define name="content">
         <f:view>
            <h:form styleClass="form_option">

               <h:outputLabel value="Enter a query:"/>
               <h:inputText value="#{controls.sql}" />
               <h:commandButton action="#{controls.make}" value="Query"/>

               <h:commandButton action="#{controls.reportGenerate}" value="Generate Report"/>

            </h:form>
            <br />
           <h:form styleClass="form_option">
         <h:outputLabel value="Choose a Query or Report on the Left"/>

          <h:outputText escape="false" value=""/>


          </h:form>

        </f:view>
     </ui:define>

代码

public String reportGenerate()
       throws JRException, ClassNotFoundException, SQLException, InstantiationException, IllegalAccessException{

    String connectionURL = "jdbc:oracle:thin:@server:1521:ora";
    String dbDriver = "oracle.jdbc.driver.OracleDriver";

    Class.forName(dbDriver).newInstance();

    Connection connection = DriverManager.getConnection(connectionURL, "PLANT", "PLANT");

    JasperDesign design = JRXmlLoader.load("C:\\Projects\\WebApplication8\\web\\uploads\\TutorialSub_1.jrxml");

    JasperReport jasperReport = JasperCompileManager.compileReport(design);

    JasperPrint print = JasperFillManager.fillReport(jasperReport, null, connection);

    JasperViewer.viewReport(print);

    JasperExportManager.exportReportToPdfFile(print, "C:\\Projects\\WebApplication8\\web\\uploads\\TutorialSub_1.pdf");

return "queries";
}

推荐答案

禁用以下行：

JasperViewer.viewReport(print);

例如：

//JasperViewer.viewReport(print);

我相信JasperViewer是在本地显示打印报告的预览器。如果这在服务器上运行，则JasperViewer将尝试访问服务器的视频显示以显示报告。有可能服务器此时会抛出异常。

I believe JasperViewer is the previewer that displays the printed report locally. If this is running on a server, then the JasperViewer will try to access the video display of the server to show the report. Chances are the server will throw an exception at this point.

要找到问题，请执行以下操作：

To find the problem, do this:

public String reportGenerateNew() {
  try {
    // Trap and print any errors or exceptions from the existing code.
    reportGenerate();
  }
  catch( Exception e ) {
    e.printStackTrace();
  }
}

查找调用的代码reportGenerate 并将其调用 reportGenerateNew 。或者使用 try ... catch 将代码包装在 reportGenerate 方法中。抛出的异常将帮助您确定问题的根源。

Find the code that calls reportGenerate and make it call reportGenerateNew. Or wrap the code within the reportGenerate method with a try...catch. The exception that gets thrown will help you determine the source of the problem.

此外，如果您尝试将PDF文件写入Web浏览器，则必须使用HTTP响应流调用相应的JasperReports API方法（它是静态的）。

Also, if you are trying to write the PDF file to a web browser, you will have to call the corresponding JasperReports API method (it is static) with the HTTP response stream.

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