如何解决小程序中的权限问题？

Question

我的小程序有一个小问题，出现以下错误。

Exception in thread "AWT-EventQueue-2" java.lang.ExceptionInInitializerError
    at applet.JSGD_Register.jButtonInitActionPerformed(JSGD_Register.java:861)
    at applet.JSGD_Register.access$1(JSGD_Register.java:841)
    at applet.JSGD_Register$2.actionPerformed(JSGD_Register.java:195)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission loadLibrary.jnifplib)
    at java.security.AccessControlContext.checkPermission(Unknown Source)
    at java.security.AccessController.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkPermission(Unknown Source)
    at java.lang.SecurityManager.checkLink(Unknown Source)
    at java.lang.Runtime.loadLibrary0(Unknown Source)
    at java.lang.System.loadLibrary(Unknown Source)
    at SecuGen.FDxSDK.jni.JFPLib.<clinit>(JFPLib.java:68)
    ... 27 more

为什么会发生这种情况以及如何解决？

Answer 1

首先阅读本文档- 小程序可以做什么和不能做什么？ **并确定applet允许的代码类型。 正如@AndrewThompson指出的（ 请参阅评论），已signed applet没有安全restrictions因为它们是digitally signed （签名），这证明它们不受特定信任作者的干扰。

有关签署的小程序的更多信息，请查看：

1. 富Internet应用程序中的安全性
2. 了解签名和验证