为什么我会得到exceptionjava.lang.NoClassDefFoundError org / codehaus / groovy /？

我刚刚尝试了Jasper Report，我正在关注这个网站的教程

我也下载了示例源，然后运行它并没有错误。 但是当我使用iReport创建自己的报告时，编译它，并将.jasper文件添加到我的项目中。 我运行程序时有exception ：

 Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/codehaus/groovy/runtime/callsite/CallSiteArray at report2_1343895135169_749208.$createCallSiteArray(calculator_report2_1343895135169_749208) at report2_1343895135169_749208.$getCallSiteArray(calculator_report2_1343895135169_749208) at report2_1343895135169_749208.(calculator_report2_1343895135169_749208) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at java.lang.Class.newInstance0(Class.java:355) at java.lang.Class.newInstance(Class.java:308) at net.sf.jasperreports.engine.design.JRAbstractJavaCompiler.loadEvaluator(JRAbstractJavaCompiler.java:112) at net.sf.jasperreports.engine.design.JRAbstractCompiler.loadEvaluator(JRAbstractCompiler.java:333) at net.sf.jasperreports.engine.JasperCompileManager.getEvaluator(JasperCompileManager.java:265) at net.sf.jasperreports.engine.fill.JRFillDataset.createCalculator(JRFillDataset.java:457) at net.sf.jasperreports.engine.fill.JRBaseFiller.(JRBaseFiller.java:379) at net.sf.jasperreports.engine.fill.JRVerticalFiller.(JRVerticalFiller.java:88) at net.sf.jasperreports.engine.fill.JRVerticalFiller.(JRVerticalFiller.java:103) at net.sf.jasperreports.engine.fill.JRVerticalFiller.(JRVerticalFiller.java:61) at net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:153) at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:82) at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:653) at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:634) at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:956) at View.MainGUI.btnExportActionPerformed(MainGUI.java:871) at View.MainGUI.access$800(MainGUI.java:50) at View.MainGUI$10.actionPerformed(MainGUI.java:541) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6267) at javax.swing.JComponent.processMouseEvent(JComponent.java:3267) at java.awt.Component.processEvent(Component.java:6032) at java.awt.Container.processEvent(Container.java:2041) at java.awt.Component.dispatchEventImpl(Component.java:4630) at java.awt.Container.dispatchEventImpl(Container.java:2099) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168) at java.awt.Container.dispatchEventImpl(Container.java:2085) at java.awt.Window.dispatchEventImpl(Window.java:2478) at java.awt.Component.dispatchEvent(Component.java:4460) at java.awt.EventQueue.dispatchEvent(EventQueue.java:599) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) Caused by: java.lang.ClassNotFoundException: org.codehaus.groovy.runtime.callsite.CallSiteArray at java.lang.ClassLoader.findClass(ClassLoader.java:359) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) ... 50 more 

这里是我用于显示报告的按钮操作（这只是示例，报告只包含一个带参数的文本：outputText）：

 Map params = new HashMap(); params.put("outputText", "Hello world"); try { JasperPrint printer = JasperFillManager.fillReport(getClass().getResourceAsStream("report2.jasper"), params, new JREmptyDataSource()); JasperViewer jv = new JasperViewer(printer); jv.show(); } catch (JRException ex) { ex.printStackTrace(); } 

如果是dependency问题，我已经将所有必需的jar导入到我的项目中，当我使用该教程中的.jasper文件时没有问题，是不是因为iReport版本不同？

Answer 1

使用CallSiteArray类需要额外的Jar包。

http://groovy.codehaus.org/Download

Answer 2

或者，您可以更改.jrxml文件，查找

 language="groovy" 

并将其更改为

 language="java" 

Answer 3

可能是因为版本不匹配。 如果你想知道你需要哪个版本的Groovy，你可以看一下Jasper的Maven资源库：

http://mvnrepository.com/artifact/net.sf.jasperreports/jasperreports/4.6.0

从这里你可以看到你需要Groovy 1.7.5 for Jasper 4.6.0

Answer 4

我在使用Jasper iReport Tool 5.6.0时遇到了同样的问题，我将语言作为Java，而正确的jasper报告库我将其归类为iReport Tool 5.1.0，它的工作方式就像魅力……希望状态仍然如此……

Answer 5

无需更改库，如果是Ireport 5.X Version，您可以在主报表属性的语言部分更改它，只需从groovy更改为java并且报告不会给出任何错误。

Answer 6

简单的回答

脚步：

1从报告检查器中选择您的根文件夹，即report1.jsxml（ Windows-> Report Inspector ）2 转到“属性”选项卡，然后单击“ 语言”选项卡，然后选择“JAVA”。

编译并预览您的应用程序已启动…

为子报告做同样的事情……