java - Java 中 iReport 5.5.1 的异常

Question

我目前正在使用 Netbeans 用 Ja​​va 创建一个学校项目。

我在使用 iReport 5.5.1 时遇到问题

这是我在程序中调用我的报告的方式:

    String report = "G:\\AssessmentRecordSystem\\src\\assessmentrecordsystem\\reports\\report2.jrxml";
 try {
    JasperReport rep = JasperCompileManager.compileReport(report);
    JasperPrint print = JasperFillManager.fillReport(rep, null, connect);
    JasperViewer.viewReport(print);
} 
catch (JRException ex) {
  //  Logger.getLogger(frmReportChooser.class.getName()).log(Level.SEVERE, null, ex);
    JOptionPane.showMessageDialog(null, ex.getMessage());
}

按下按钮时将调用上述代码。然后，这出现在 Netbeans 的输出窗口中，但没有任何反应:

    2014-09-23 14:01:23,302 WARN  [AWT-EventQueue-0] net.sf.jasperreports.engine.component.ComponentsEnvironment: Found two components for namespace http://jasperreports.sourceforge.net/jasperreports/components`
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/apache/commons/javaflow/bytecode/Continuable
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:446)
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:849)
    at assessmentrecordsystem.AssessmentRecordSystemMainForm.jButton2ActionPerformed(AssessmentRecordSystemMainForm.java:2166)
    at assessmentrecordsystem.AssessmentRecordSystemMainForm.access$1400(AssessmentRecordSystemMainForm.java:58)
    at assessmentrecordsystem.AssessmentRecordSystemMainForm$21.actionPerformed(AssessmentRecordSystemMainForm.java:1476)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
    at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
    at java.awt.Component.processMouseEvent(Component.java:6505)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
    at java.awt.Component.processEvent(Component.java:6270)
    at java.awt.Container.processEvent(Container.java:2229)
    at java.awt.Component.dispatchEventImpl(Component.java:4861)
    at java.awt.Container.dispatchEventImpl(Container.java:2287)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
    at java.awt.Container.dispatchEventImpl(Container.java:2273)
    at java.awt.Window.dispatchEventImpl(Window.java:2719)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:729)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:688)
    at java.awt.EventQueue$3.run(EventQueue.java:686)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:702)
    at java.awt.EventQueue$4.run(EventQueue.java:700)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:699)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.javaflow.bytecode.Continuable
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
    ... 54 more`

关于程序导入的 jar 文件。这是我导入的所有 jar 文件:

jasperreports-applet-4.6.0.jar
jasperreports-fonts-4.6.0.jar
jasperreports-javaflow-4.6.0.jar
jasperreports-4.6.0.jar
groovy-all-1.7.5.jar
commons-beanutils-1.8.0.jar
commons-collections-2.1.1.jar
commons-digester-2.1.1.jar
commons-logging-1.1.1.jar
devtools-1.1-all.jar
rs2xml.jar

伙计们，我非常需要你们的帮助和关于我的这个问题的宝贵想法...... 希望任何帮助都会阻碍我..

Answer 1

添加commons-javaflow-<version>.jar进入你的类路径

您可以下载here