参考
http://tech.meituan.com/ac.html
http://blog.csdn.net/joylnwang/article/details/6793192
http://www.hankcs.com/program/algorithm/implementation-and-analysis-of-aho-corasick-algorithm-in-java.html
原文：http://www.cnblogs.com/shenwei1234ab/p/6942448.html