这可能是JDK的bin目录不在您的PATH中的情况。尝试把它放在你的路径。看到这个其他堆栈溢出问题的更多细节。方向对于Windows 8几乎相同

This is probably a case of the JDK's bin directory not being in your PATH. Try to put it in your path. see this other stack overflow question for more details. The directions are the pretty much the same for windows 8

堆栈溢出回答