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  1. ,
    Expert tip

    You need to add httpcore to your dependencies. Try adding version 4.3 or further.

  2. ,
    Expert tip

    A few things cause this exception:
    1) Check if you have all jars and if they're in the correct path.
    2) Your classpath might be broken, you can define it in the command line with java -cp yourClassPath or at your IDE if you're using one.

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java.lang.ClassNotFoundException: org.apache.commons.codec.digest.DigestUtils	at java.net.URLClassLoader$1.run(URLClassLoader.java:372)	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:360)	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)	at org.apache.poi.hssf.usermodel.HSSFWorkbook.addPicture(HSSFWorkbook.java:1610)	at net.sf.jasperreports.engine.export.JRXlsExporter.exportImage(JRXlsExporter.java:1629)	at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportPage(JRXlsAbstractExporter.java:1020)	at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportReportToStream(JRXlsAbstractExporter.java:815)	at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportReport(JRXlsAbstractExporter.java:665)	at net.sf.jasperreports.view.save.JRSingleSheetXlsSaveContributor.save(JRSingleSheetXlsSaveContributor.java:124)	at net.sf.jasperreports.view.JRViewer.btnSaveActionPerformed(JRViewer.java:1233)	at net.sf.jasperreports.view.JRViewer$3.actionPerformed(JRViewer.java:763)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)	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:6525)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)	at java.awt.Component.processEvent(Component.java:6290)	at java.awt.Container.processEvent(Container.java:2234)	at java.awt.Component.dispatchEventImpl(Component.java:4881)	at java.awt.Container.dispatchEventImpl(Container.java:2292)	at java.awt.Component.dispatchEvent(Component.java:4703)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)	at java.awt.Container.dispatchEventImpl(Container.java:2278)	at java.awt.Window.dispatchEventImpl(Window.java:2739)	at java.awt.Component.dispatchEvent(Component.java:4703)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746)	at java.awt.EventQueue.access$400(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:697)	at java.awt.EventQueue$3.run(EventQueue.java:691)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)	at java.awt.EventQueue$4.run(EventQueue.java:719)	at java.awt.EventQueue$4.run(EventQueue.java:717)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:716)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)