JasperReports：获取“java.lang.NoClassDefFoundError：org/slf4j/LoggerFactory”异常
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JasperReports: getting "java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory" Exception
提问by Dimi
I have created a report (JasperReports 5.5) using the JasperReports pluginfor NetBeans 6.9.1(Java 1.6). I can create a report and the report can be successfully viewed using the Preview tab of the JasperReports Plugin. But when I use Javacode to access the report it gives the following Error:
我创建了一个报告（JasperReports的5.5使用）的JasperReports插件为的NetBeans 6.9.1（Java 1.6的）。我可以创建一个报告，并且可以使用JasperReports Plugin的 Preview 选项卡成功查看该报告。但是当我使用Java代码访问报告时，它给出了以下错误：
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)
at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:131)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:272)
at net.sf.jasperreports.engine.util.JRLoader.<clinit>(JRLoader.java:68)
at net.sf.jasperreports.engine.JRPropertiesUtil.loadProperties(JRPropertiesUtil.java:99)
at net.sf.jasperreports.engine.DefaultJasperReportsContext.initProperties(DefaultJasperReportsContext.java:94)
at net.sf.jasperreports.engine.DefaultJasperReportsContext.<init>(DefaultJasperReportsContext.java:71)
at net.sf.jasperreports.engine.DefaultJasperReportsContext.<clinit>(DefaultJasperReportsContext.java:59)
at net.sf.jasperreports.engine.JasperCompileManager.getDefaultInstance(JasperCompileManager.java:84)
at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:459)
at Interfaces.MainMenu.jMenuItem3ActionPerformed(MainMenu.java:854)
at Interfaces.MainMenu.access00(MainMenu.java:50)
at Interfaces.MainMenu.actionPerformed(MainMenu.java:494)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:809)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:850)
at java.awt.Component.processMouseEvent(Component.java:6288)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6053)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4651)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4481)
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:4481)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
at java.awt.EventQueue.accesstry {
String report = "C:\Users\Admin\Documents\WarrantReport.jrxml";
JasperReport jr = JasperCompileManager.compileReport(report);
JasperPrint jp = JasperFillManager.fillReport(jr, null, c);
JasperViewer.viewReport(jp);
} catch (JRException ex) {
Logger.getLogger(MainMenu.class.getName()).log(Level.SEVERE, null, ex);
}
0(EventQueue.java:84)
at java.awt.EventQueue.run(EventQueue.java:602)
at java.awt.EventQueue.run(EventQueue.java:600)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue.run(EventQueue.java:616)
at java.awt.EventQueue.run(EventQueue.java:614)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:613)
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.slf4j.LoggerFactory
at java.net.URLClassLoader.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
... 51 more
When I add the mentioned JAR file it gives the same error with a different JAR and it goes on and on.
当我添加提到的 JAR 文件时，它会使用不同的 JAR 给出相同的错误，并且它会继续下去。
I have used the following code to access the report.
我已使用以下代码访问报告。
##代码##I have added the following 5 JAR files to my Project folder Libraries:
jasperreports 5.5 applet, fonts, functions, javaflow.
我已将以下 5 个 JAR 文件添加到我的项目文件夹库中：
jasperreports 5.5 applet、fonts、functions、javaflow。
Please help me find the error.
请帮我找出错误。
回答by Gaurav Varma
A NoClassDefFoundErrorwith ClassNotFoundExceptionspecifies that the particular class is missing during runtime. For the LoggerFactoryto be available you should have any of these jarsin your classpath.
一个NoClassDefFoundError与ClassNotFoundException该特定类是运行过程中缺少指定。为了使LoggerFactory可用，您的类路径中应该有这些 jar中的任何一个。
You can further debug a NoClassDefFoundError here
