JasperReports：获取“java.lang.NoClassDefFoundError：org/slf4j/LoggerFactory”异常答案

【问题标题】：JasperReports: getting "java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory" ExceptionJasperReports：获取“java.lang.NoClassDefFoundError：org/slf4j/LoggerFactory”异常
【发布时间】：2014-01-02 07:14:38
【问题描述】：

我使用 JasperReports 插件为 NetBeans 6.9.1 (Java 1.6 创建了一个报告 (JasperReports 5.5) em>）。我可以创建一个报告，并且可以使用 JasperReports 插件 的“预览”选项卡成功查看该报告。但是当我使用 Java 代码访问报告时，它会给出以下错误：

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.access$1300(MainMenu.java:50)
    at Interfaces.MainMenu$14.actionPerformed(MainMenu.java:494)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
    at javax.swing.AbstractButton$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.access$000(EventQueue.java:84)
    at java.awt.EventQueue$1.run(EventQueue.java:602)
    at java.awt.EventQueue$1.run(EventQueue.java:600)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$2.run(EventQueue.java:616)
    at java.awt.EventQueue$2.run(EventQueue.java:614)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.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$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 51 more

当我添加提到的 JAR 文件时，它会在使用不同的 JAR 时给出相同的错误，并且它会一直持续下去。

我已使用以下代码访问报告。

try {
        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);
    }

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 小程序、字体、函数、javaflow。

请帮我找出错误。

【问题讨论】：

你应该考虑使用一些依赖管理器，比如 maven。这些确实有助于解决 no class def found 异常，因为它们会自动获取所有需要的 jar。
java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory的可能重复
@AlexK.. 你能详细说明一下吗？你的答案不清楚。

标签： java jasper-reports noclassdeffounderror classnotfoundexception

【解决方案1】：

带有ClassNotFoundException 的NoClassDefFoundError 指定特定类在运行时丢失。要使LoggerFactory 可用，您的类路径中应该有任何these jars。

您可以进一步debug a NoClassDefFoundError here

【讨论】：