Jasper子报告错误 [英] Jasper sub report error

问题描述

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);

当简单报告
不适用于子报告时，这是有效的...

this works when simple report not working for sub reports...

推荐答案

我的Jarper知识是几个旧版本，但希望这有用。

My Jarper knowledge is couple versions old, but lets hope this is helpful.

这是因为jasper找不到您的子报表。 Jasper可以编译您的报告，但是当您调用 compileReport 时，它不会编译引用的子报告。填写报表时，找不到引用的子报表，因为它们在工作目录中不可用。

This is because jasper does not find your subreport. Jasper can compile your report, but it does not compile referenced subreports when you call compileReport. When filling the report referenced subreports are not found because they are not available in working directory.

（每次请求报表时编译报表都是个坏主意（除非你有一些非常重要的理由这样做。）

(Compiling report every time it is requested is kind a bad idea (unless you have some really heavy reasons to do so).)

解决这个问题有很多方法。一种方法是确保路径正确并在应用程序部署之前预编译报告。链接Alex K提供的是一个很好的来源。如果在应用程序编译中是必需的，那么可以使用下面的解决方案：

There are couple of ways solving this. One would be making sure the the paths are correct and precompiling the reports before application deployment. Links Alex K provided are an excellent source for this. If in application compilation is required then using solution below is possible:

在Web应用程序中，我发现一个工作实践是处理编译并填写报告来管理它手动。这是我写的助手类。希望它有用（它使用弹簧，但这些部件很容易更换）。

In web application I've found that a working practice is to handle compilation and filling your reports is to manage it manually. Here is helper class I wrote. Hope that it is useful (it uses spring, but those parts are easily replaceable).

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;
    }
}

在这个类的帮助下，您可以参考子报告这样的文件：

With the help of this class you can refer subreports in documents like this:

<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>

这里 $ P {data} 是合适的作为文档参数提供的对象，其中 getSubreport（）最终调用 ReportSource.getReport（）。它当然可以是 $ P {reportSource} .getReport（....）如果提供 ReportSource 直接作为参数。 （我们使用ReportModel方法;简而言之，它是适合报告上下文的表示模型）。

Here $P{data} is suitable object provided as document parameter, where getSubreport() ends up calling ReportSource.getReport(). It could of course be $P{reportSource}.getReport("....") if ReportSource is provided as parameter directly. (We use ReportModel-approach; in short it is presentation model fitted to the context of reports).

这篇关于Jasper子报告错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！