如何避免获取java.lang.NoClassDefFoundError：org / apache / commons / logging / LogFactory

Question

我有一个NetBeans项目，我想在其中设计jasper报告，当我通过JasperFillManager.fillReport填写报告时，我发现了一条错误消息。

我该如何解决这个问题？

我使用过iReport 5.0.0和JasperReports库5.1.0。

我的代码如下所述

try {
    String reportName = "./rptJobList.jasper";
    InputStream is = new FileInputStream(reportName);
    Class.forName("com.mysql.jdbc.Driver");
    Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/js001?user=root&password=admin");
    JasperPrint jasperPrint = JasperFillManager.fillReport(is, null, con);
    JasperViewer jv = new JasperViewer(jasperPrint);
    jv.setVisible(true);
} catch (Exception ex) {
}

例外是：

线程“AWT-EventQueue-0”中的异常java.lang.NoClassDefFoundError：net.sf.上的net.sf.jasperreports.engine.util.JRLoader。（JRLoader.java:68）中的org / apache / commons / logging / LogFactory。 jasperreports.engine.JRPropertiesUtil.loadProperties（JRPropertiesUtil.java:99）at net.sf.jasperreports.engine.DefaultJasperReportsContext.initProperties（DefaultJasperReportsContext.java:94）at net.sf.jasperreports.engine.DefaultJasperReportsContext。（DefaultJasperReportsContext.java:71 ）在net.sf.jasperreports.engine.DefaultJasperReportsContext。（DefaultJasperReportsContext.java:59）在net.sf.jasperreports.engine.JasperFillManager.getDefaultInstance（JasperFillManager.java:85）在net.sf.jasperreports.engine.JasperFillManager.fillReport （JasperFillManager.java:824）在job.NewClass.jButton2ActionPerformed（NewClass.java:64）在job.NewClass.access $ 000（NewClass.java:21）在job.NewClass $ 1.actionPerformed（NewClass.java:42）在使用javax .swing.AbstractButton.fireActionPerformed（AbstractButton.java:1995）at javax.swing.Abst ractButton $ Handler.actionPerformed（AbstractButton.java:2318）在javax.swing.DefaultButtonModel.fireActionPerformed（DefaultButtonModel.java:387）在javax.swing.DefaultButtonModel.setPressed（DefaultButtonModel.java:242）在javax.swing.plaf.basic中.BasicButtonListener.mouseReleased（BasicButtonListener.java:236）在java.awt.Component.processMouseEvent（Component.java:6134）在javax.swing.JComponent.processMouseEvent（JComponent.java:3265）在java.awt.Component.processEvent（ Component.java:5899）java.awt.Container.processEvent（Container.java:2023）at java.awt.Component.dispatchEventImpl（Component.java:4501）at java.awt.Container.dispatchEventImpl（Container.java:2081））java.awt.LightweightDispatcher.retargetMouseEvent（Container.java:4301）的java.awt.Component.dispatchEvent（Component.java:4331）java.awt.LightweightDispatcher.processMouseEvent（Container.java:3965）at java.awt .LightweightDispatcher.dispatchEvent（Container.java:3895）at java.awt.Container.dispatchEventImpl（Container.java:206 7）java.awt.Window.dispatchEventImpl（Window.java:2458）at java.awt.Component.dispatchEvent（Component.java:4331）at java.awt.EventQueue.dispatchEvent（EventQueue.java:599）at java。位于java.awt.EventDispatchThread.pumpEventsForFilter（EventDispatchThread.java:184）的awt.EventDispatchThread.pumpOneEventForFilters（EventDispatchThread.java:269）位于java.awt.EventDispatchThread.pumpEvents的java.awt.EventDispatchThread.pumpEventsForHierarchy（EventDispatchThread.java:174）（EventDispatchThread.java:169）在java.awt.EventDispatchThread.pumpEvents（EventDispatchThread.java:161）在java.awt.EventDispatchThread.run（EventDispatchThread.java:122）产生的原因：抛出java.lang.ClassNotFoundException：org.apache。 commons.logging.LogFactory在java.net.URLClassLoader的$ 1.run（URLClassLoader.java:200）在java.security.AccessController.doPrivileged（本机方法）在java.net.URLClassLoader.findClass（URLClassLoader.java:188）是java .lang.ClassLoader.loadClass（ClassLoader.java:307）at sun.misc.Launcher $ AppClassLoader.loadC lass（Launcher.java:301）at java.lang.ClassLoader.loadClass（ClassLoader.java:252）at java.lang.ClassLoader.loadClassInternal（ClassLoader.java:320）... 35更多