Java 在Eclipse NoClassDefFoundError中使用Jasper报告时出现问题

因此，当我想在Eclipse应用程序中使用Jasper Reports时，我遇到了一个问题。 当我想写PDF时，我总是会遇到以下错误

在我的应用程序中，该类确实存在，我可以使用它。 Jaspersoft Studio可以毫无问题地编译我的jasper文件。 当我想在Studio中进行预览时，会出现以下错误：

net.sf.jasperreports.engine.JRException: net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression :
    Source text : $F{globalAngaben}.getPruefberichtnr()
    at com.jaspersoft.studio.editor.preview.view.control.ReportControler.fillReport(ReportControler.java:466)
    at com.jaspersoft.studio.editor.preview.view.control.ReportControler.access$18(ReportControler.java:441)
    at com.jaspersoft.studio.editor.preview.view.control.ReportControler$4.run(ReportControler.java:333)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression :
    Source text : $F{globalAngaben}.getPruefberichtnr()
    at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:263)
    at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:611)
    at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:579)
    at net.sf.jasperreports.engine.fill.JRFillElement.evaluateExpression(JRFillElement.java:1016)
    at net.sf.jasperreports.engine.fill.JRFillTextField.evaluateText(JRFillTextField.java:504)
    at net.sf.jasperreports.engine.fill.JRFillTextField.evaluate(JRFillTextField.java:488)
    at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:259)
    at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:456)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillTitle(JRVerticalFiller.java:354)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:290)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:152)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:963)
    at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFiller.run(BaseFillHandle.java:120)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassCastException: com.systech.ge.client.dao.GlobalAngaben cannot be cast to com.systech.ge.client.dao.GlobalAngaben
    at Gerentform_A4_1425317364309_973729.evaluate(Gerentform_A4_1425317364309_973729:215)
    at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:250)
    ... 13 more 

目前还没有找到解决方案。 也许这里有人有线索

到目前为止

编辑：

---

它会导致@fillReport崩溃。

只是堆栈跟踪不会有特别的帮助。您的代码是什么导致这些错误的？对不起，完全忘记了。我通过插件和所有JAR添加依赖项。

net.sf.jasperreports.engine.JRException: net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression :
    Source text : $F{globalAngaben}.getPruefberichtnr()
    at com.jaspersoft.studio.editor.preview.view.control.ReportControler.fillReport(ReportControler.java:466)
    at com.jaspersoft.studio.editor.preview.view.control.ReportControler.access$18(ReportControler.java:441)
    at com.jaspersoft.studio.editor.preview.view.control.ReportControler$4.run(ReportControler.java:333)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: net.sf.jasperreports.engine.fill.JRExpressionEvalException: Error evaluating expression :
    Source text : $F{globalAngaben}.getPruefberichtnr()
    at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:263)
    at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:611)
    at net.sf.jasperreports.engine.fill.JRCalculator.evaluate(JRCalculator.java:579)
    at net.sf.jasperreports.engine.fill.JRFillElement.evaluateExpression(JRFillElement.java:1016)
    at net.sf.jasperreports.engine.fill.JRFillTextField.evaluateText(JRFillTextField.java:504)
    at net.sf.jasperreports.engine.fill.JRFillTextField.evaluate(JRFillTextField.java:488)
    at net.sf.jasperreports.engine.fill.JRFillElementContainer.evaluate(JRFillElementContainer.java:259)
    at net.sf.jasperreports.engine.fill.JRFillBand.evaluate(JRFillBand.java:456)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillTitle(JRVerticalFiller.java:354)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:290)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:152)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:963)
    at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFiller.run(BaseFillHandle.java:120)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassCastException: com.systech.ge.client.dao.GlobalAngaben cannot be cast to com.systech.ge.client.dao.GlobalAngaben
    at Gerentform_A4_1425317364309_973729.evaluate(Gerentform_A4_1425317364309_973729:215)
    at net.sf.jasperreports.engine.fill.JREvaluator.evaluate(JREvaluator.java:250)
    ... 13 more 

JRBeanCollectionDataSource jrbcds = new JRBeanCollectionDataSource( Arrays.asList( fsureport ) );

JasperPrint jasperPrint;
Map< String, Object > parameter = new HashMap< String, Object >();

jasperPrint = JasperFillManager.fillReport( in, parameter, jrbcds );