从 InputStream 加载对象时出错 - jasper 报告

Question

我正在尝试为我们的报告生成传递子报告上的对象列表，但我收到此错误消息：

net.sf.jasperreports.engine.JRException: Error loading object from InputStream
net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Error loading object from InputStream
    at net.sf.jasperreports.repo.SerializedObjectPersistenceService.load(SerializedObjectPersistenceService.java:65) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.repo.SerializedReportPersistenceService.load(SerializedReportPersistenceService.java:46) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.repo.DefaultRepositoryService.getResource(DefaultRepositoryService.java:187) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.repo.RepositoryUtil.getResourceFromLocation(RepositoryUtil.java:246) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.repo.RepositoryUtil.getReport(RepositoryUtil.java:208) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateReport(JRFillSubreport.java:328) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateSubreport(JRFillSubreport.java:361) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubreport.java:286) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:259) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:459) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2044) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:778) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:288) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:151) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:909) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:841) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:88) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:653) ~[jasperreports-5.0.1.jar:5.0.1]
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:969) ~[jasperreports-5.0.1.jar:5.0.1]

关于这个问题，我尝试了不同的教程，但我仍然遇到相同的错误，下面是传递给主报告的主要对象的示例结构

    private String headerRecordFormat;
    private String institutionRecordFormat;
    private ArrayList<InstituionDetailFormatTransactions> listOfTransactions;
    private String institutionTrailerRecordFormat;

这就是我目前如何将数组列表“listOfTransactions”声明到我的主 xml 并在调用子报告时使用它

<field name="listOfTransactions" class="java.util.ArrayList" >
        <fieldDescription><![CDATA[listOfTransactions]]></fieldDescription>
    </field>

                    <subreport>
                    <reportElement x="0" y="15" width="560" height="15">
                    </reportElement>
                    <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{listOfTransactions})]]></dataSourceExpression>
                    <subreportExpression><![CDATA[$P{SUBREPORT_DIR} + "dpsPgpSubReport.jrxml"]]></subreportExpression>
                </subreport>

对象 InstituionDetailFormatTransactions 只包含一个 String 类型的实例变量。我在 xml 上的声明是否有任何错误？

Answer 1

尝试重新启动计算机。

我花了好几个小时才发现发生了什么事。我做对了，一切都应该顺利。然后，第二天，我启动了我的机器，它工作了！