嘗試使用OSHI的get（）方法時引發NoClassDefFoundError

Question

我正在使用Java項目OSHI（操作系統硬件信息），旨在獲取系統信息。

我正在使用NetBeans IDE，並且已將每個依賴項的單個jar文件添加到項目庫。 但是，每當我嘗試使用任何get（）方法時，都會引發NoClassDefFoundError。 例如，這是我嘗試獲取操作系統信息的代碼（已添加了所有必需的import語句）；

SystemInfo si=new SystemInfo();
HardwareAbstractionLayer hal = si.getHardware();
Sensors sense=hal.getSensors();
System.out.println("Cpu Temperature" + sense.getCpuTemperature());

當我運行此代碼時，它顯示以下錯誤；

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: com/sun/jna/platform/win32/Variant$VARIANT
at oshi.hardware.platform.windows.WindowsSensors.getCpuTemperature(WindowsSensors.java:54)
at pandorastress.PandoraUI.b1ActionPerformed(PandoraUI.java:168)
at pandorastress.PandoraUI.access$000(PandoraUI.java:55)
at pandorastress.PandoraUI$1.actionPerformed(PandoraUI.java:83)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
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.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
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)
Caused by: java.lang.ClassNotFoundException: 
com.sun.jna.platform.win32.Variant$VARIANT
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 40 more

有什么辦法可以糾正這個問題？

Answer 1

根據先前的一些答案 ，您需要Java本機訪問（JNA）庫和實現slf4j的日志記錄系統。

要添加JNA支持，您可以從此鏈接下載相應的（基於您的系統）捆綁軟件。

另外，您可以嘗試通過下載jar並將其添加到項目中來直接添加JNA捆綁包。

否則，您可以將項目更改為Maven項目，然后使用Maven構建項目。 這將下載所有依賴項。