Jasper子报告错误

Question

com.hughes.exception.HughesException
    at com.hughes.service.serviceImpl.HomeServiceImpl.sendTicketEmail(HomeServiceImpl.java:1094)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

.......................................................
..........................................

Caused by: net.sf.jasperreports.engine.JRException: Resource not found at : nullinvoiceDetail.jasper
    at net.sf.jasperreports.repo.RepositoryUtil.getResource(RepositoryUtil.java:155)
    at net.sf.jasperreports.repo.RepositoryUtil.getReport(RepositoryUtil.java:126)
    at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateReport(JRFillSubreport.java:317)
    at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateSubreport(JRFillSubreport.java:347)
    at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubreport.java:275)
    at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:257)
    at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:473)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2021)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:755)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:265)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:128)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:836)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:765)
    at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:84)
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:624)
    at com.hughes.service.serviceImpl.HomeServiceImpl.sendTicketEmail(HomeServiceImpl.java:1046)
    ... 81 more

JasperReport jasperReport = JasperCompileManager.compileReport(hdnWebInfPath+seperator+"reports"+seperator+"invoice.jrxml");
                        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, model, new JREmptyDataSource());
                        JasperExportManager.exportReportToPdfFile(jasperPrint, fPath+seperator+fileName);

当简单报表不适用于子报表时，此操作有效...

Answer 1

我的Jarper知识是两个版本的旧，但让我们希望这是有帮助的。

这是因为jasper找不到您的子报告。Jasper可以编译您的报表，但当您调用compileReport时，它不会编译引用的子报表。填写报表时，由于工作目录中没有引用子报表，所以找不到引用子报表。

（每次被要求时都要编写报告是一个坏主意（除非你有很大的理由这样做）。）

public class ReportSource {

    // Key = document name, Value = path to .jrxml
    private Map<String, String> reports;
    private final Map<String, JasperReport> compiled;

    private final boolean lazy;

    private final Logger log = Logger.getLogger(ReportSource.class);

    public ReportSource(final boolean lazyBuild) {
        super();
        lazy = lazyBuild;
        compiled = new HashMap<String, JasperReport>();
    }

    public void setCompileTargets(final Map<String, String> targets) {
        reports = new HashMap<String, String>(targets);
        if (!lazy) {
            for (final String key : targets.keySet()) {
                compile(key);
            }
        }
    }

    public JasperReport getReport(final String reportName) {
        if (compiled.get(reportName) == null) { // not found or not compiled
            log.info("Lazily compiling: " + reportName);
            return compile(reportName);
        }
        return compiled.get(reportName);
    }

    private JasperReport compile(final String reportName) {
        final String path = reports.get(reportName);

        InputStream fis = null;
        JasperReport report = null;
        try {
            final FileSystemResourceLoader resourceLoader = new FileSystemResourceLoader();
            fis = resourceLoader.getResource(path).getInputStream();
            log.info("Compiling report: " + reportName + " (" + path + ")");
            report = JasperCompileManager.compileReport(fis);
        } catch (final IOException ioe) {
            throw new IllegalStateException("Configuration error file: " + path + " (for key: " + reportName +") not found.", ioe);
        } catch (final JRException jre) {
            throw new IllegalStateException("Configuration error file: " + path + " (for key: " + reportName +") not found.", jre);
        }

        compiled.put(reportName, report);
        return report;
    }
}

在该类的帮助下,您可以引用文档中的子报表,如下所示：

<subreport>
    <reportElement x="0" y="0" width="200" height="30"/>
    <subreportParameter name="data">
        <subreportParameterExpression><![CDATA[$P{data}]]></subreportParameterExpression>
    </subreportParameter>
    <subreportParameter name="REPORT_RESOURCE_BUNDLE">
        <subreportParameterExpression><![CDATA[$P{REPORT_RESOURCE_BUNDLE}]]></subreportParameterExpression>
    </subreportParameter>
    <dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.JREmptyDataSource()]]></dataSourceExpression>
    <subreportExpression class="net.sf.jasperreports.engine.JasperReport"><![CDATA[$P{data}.getSubreport("name_of_your_subreport")]]></subreportExpression>
</subreport>

在这里，$P{data}是作为文档参数提供的合适对象，其中GetSubReport()最终调用ReportSource.GetReport()。如果reportSource直接作为参数提供，那么它当然可以是$p{reportSource}.getReport（“...”）。（我们使用ReportModel-Approach；简而言之，它是适合于报表上下文的表示模型）。