从python移植的B站AV号BV号互转算法源码
private static String table = "fZodR9XQDSUm21yCkr6zBqiveYah8bt4xsWpHnJE7jL5VG3guMTKNPAwcF";private static HashMap<String, Integer> mp = new HashMap<>();private static HashMap<Integer, String> mp2 = new HashMap<>();static int ss[] = {11, 10, 3, 8, 4, 6, 2, 9, 5, 7};static long xor = 177451812;static long add = 8728348608l;public static void main(String[] args) {System.out.println(b2v("BV1FE411c7co"));System.out.println(v2b("av98464354"));}public static long power(int a, int b) {long power = 1;for (int c = 0; c < b; c++)power *= a;return power;}public static String b2v(String s) {long r = 0;for (int i = 0; i < 58; i++) {String s1 = table.substring(i, i + 1);mp.put(s1, i);}for (int i = 0; i < 6; i++) {r = r + mp.get(s.substring(ss[i], ss[i] + 1)) * power(58, i);}return "av" + ((r - add) ^ xor);}public static String v2b(String st) {long s = Long.valueOf(st.split("av")[1]);StringBuffer sb = new StringBuffer("BV1 4 1 7 ");s = (s ^ xor) + add;for (int i = 0; i < 58; i++) {String s1 = table.substring(i, i + 1);mp2.put(i, s1);}for (int i = 0; i < 6; i++) {String r = mp2.get((int) (s / power(58, i) % 58));sb.replace(ss[i], ss[i] + 1, r);}return sb.toString();}
花了点时间从python移植过来的。
