Jasper Report JasperReportsPdfView SpringBoot 子报表报错

Question

报告结构：

main report - myreport.jrxml 
sub report  - myreport_detail.jrxml

运行我的主报表和子报表在 Jasper Report Studio 中运行良好。在我的 Spring 引导环境中，我使用 JasperReportsPdfView。

然而运行 myreport.jrxml 我得到：

Caused by: net.sf.jasperreports.engine.JRException: Resource not found at: jasper/repo/myreport_detail.jasper.
at net.sf.jasperreports.repo.RepositoryUtil.getResourceFromLocation(RepositoryUtil.java:153)
at net.sf.jasperreports.repo.RepositoryUtil.getReport(RepositoryUtil.java:112)
at net.sf.jasperreports.engine.fill.JRFillSubreport.loadReport(JRFillSubreport.java:411)
at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateReport(JRFillSubreport.java:378)
at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluateSubreport(JRFillSubreport.java:440)
at net.sf.jasperreports.engine.fill.JRFillSubreport.evaluate(JRFillSubreport.java:354)
at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:383)
at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:506)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2412)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:761)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:240)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:99)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:607)
at net.sf.jasperreports.engine.fill.BaseReportFiller.fill(BaseReportFiller.java:387)
at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:109)
at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:456)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:863)
at org.springframework.web.servlet.view.jasperreports.AbstractJasperReportsView.doFillReport(AbstractJasperReportsView.java:702)
at org.springframework.web.servlet.view.jasperreports.AbstractJasperReportsView.fillReport(AbstractJasperReportsView.java:669)
at org.springframework.web.servlet.view.jasperreports.AbstractJasperReportsView.renderMergedOutputModel(AbstractJasperReportsView.java:566)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1271)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
... 97 common frames omitted

注意：运行没有子报告的单个报告可以正常工作

端点：

    @RequestMapping(value = "/api", params = {"dir", "name"})
public ModelAndView report(
    HttpServletRequest request,
    @RequestParam(value = "dir") String dir,
    @RequestParam(value = "name") String name) throws Exception {

    JasperReportsPdfView view = new JasperReportsPdfView();
    view.setJdbcDataSource(dataSource);
    view.setUrl("classpath:jasper/" + dir + "/" + name + ".jrxml");
    view.setApplicationContext(context);
    view.setHeaders(getProperties(name, false));
    return new ModelAndView(view, getParameters(request));
}

Java 代码崩溃 RepositoryUtil:

    public <K extends Resource> K getResourceFromLocation(String location, Class<K> resourceType) throws JRException
{
    K resource = null;
    List<RepositoryService> services = getServices();
    if (services != null)
    {
        for (RepositoryService service : services)
        {
            resource = service.getResource(location, resourceType);
            if (resource != null)
            {
                break;
            }
        }
    }
    if (resource == null)
    {
        throw 
        new JRException(
            EXCEPTION_MESSAGE_KEY_RESOURCET_NOT_FOUND,
            new Object[]{location});    //FIXMEREPO decide whether to return null or throw exception; check everywhere
    }
    return resource;
}

错误行：

    resource = service.getResource(location, resourceType);

变量：

  location -> jasper/repo/myreport_detail.jasper
  resourceType -> class net.sf.jasperreports.repo.ReportResource

抛出异常行，因为 resource = null:

    public static final String EXCEPTION_MESSAGE_KEY_RESOURCET_NOT_FOUND = "repo.resource.not.found";

有人吗？

Answer 1

这似乎是我在 1 点遇到的 Jasper Studio 问题。尝试检查您在主报表中用于子报表的表达式。根据版本的不同，Jasper Report Studio 希望将子报告定义为

"folderOfyourSubReport/myreport_detail.jrxml"

或

"folderOfyourSubReport/myreport_detail.jasper"

Answer 2

提供了 .jasper 文件，然后就可以了。运行只有一份报告，没有子报告，不过我不需要提供它们:-) 认为它们是在 Spring 引导环境中即时生成的。

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