去下stk套件，然后引用就可以了，具体看这里=》http://wenku.baidu.com/link?url=kSLNRj5ycmsUKsbOqrhWkTtfF8rnrd0fpmsD3n3k-2HIMWLQ2hiuEzVXZtBbf8ZXiRPQ7n7Eb_L2_w0J_eLUOUS6Du-8sKpvIFGz4tbio2m
