如标题所述， 我在进行Windows 上的智能卡交互系统的研发。
此问题是出现在了连接过程中， 如下代码所示：
代码语言：javascript复制CardTerminal card =c.connect("T=0");解决办法：
代码语言：javascript复制//将T=0协议换成* ，意思是说让系统自动寻找合适的协议
CardTerminal card =c.connect("*");如果想了解原因所在， 那么继续往下翻。
具体错误信息如下：
代码语言：javascript复制javax.smartcardio.CardException: connect() failed
at sun.security.smartcardio.TerminalImpl.connect(Unknown Source)
at com.gd.factory.utils.EseTools.connect(EseTools.java:160)
at com.gd.factory.ui.MainJMiddleView.actionPerformed(MainJMiddleView.java:283)
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.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(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: sun.security.smartcardio.PCSCException: SCARD_E_PROTO_MISMATCH
at sun.security.smartcardio.PCSC.SCardConnect(Native Method)
at sun.security.smartcardio.CardImpl.<init>(Unknown Source)具体原因是在于这里：
Caused by: sun.security.smartcardio.PCSCException: SCARD_E_PROTO_MISMATCH
其实， “SCARD_E_PROTO_MISMATCH” 的意思是 表明该卡不支持您正在使用的协议，说到这里相信你就应该明白了，因为Java和Windows的本机智能卡API之间的接口可能不允许（或实现）强制执行特定协议，而且在SLE-4428卡上找到的数据表似乎没有提到卡支持的协议。
