驱动器未就绪。
您可以从文件大小来区别JAR的就绪版本和未就绪版本。
You can distinguish a prepared version of this JAR from an unprepared version by their file sizes.
另外，未初始化的就绪状态在实际的应用程序中是没有真正的用处的。
Furthermore, the uninitialized ready state is pretty useless in practical applications.
第一种就绪状态的特点是readyState属性为0（readyState == 0），表示未初始化状态。
The first ready state, signified by the readyState property 0 (readyState == 0), represents an uninitialized request.
第一种就绪状态的特点是readyState属性为0（readyState == 0），表示未初始化状态。
The first ready state, signified by the readyState property 0 (readyState == 0), represents an uninitialized request.
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