BM 字符匹配算法--BM算法在进行匹配时，包含两个并行的算法，坏字符算法和好后缀算法，这两种算法的目的就是为了让模式串每次向右移动尽可能大的距离。-BM character matching algorithm- the BM algorithm during the match, contains the algorithm, two parallel bad characters algorithm and good suffix algorithm, the purpose of the