BM可以说是继KMP算法之后更加 优秀的字符串匹配算了，BM 是大师Boyer-Moore的算法杰作， 所以称BM算法， 相比KMP算法效率提高了不少， -BM can be said that after following the KMP algorithm for string matching better forget, BM is the master of the Boyer-Moore algorithm masterpiece, so that BM algorit