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Modified
other/bvid_desc.md
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-2
XFEstudio/bilibili-API-collect
添加AV、BV互转的Java实现 (#478)
91e9e4b
代码差异
1 个文件
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@@ -59,9 +59,9 @@
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## 转换程序
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使用Python、C以及TypeScript作为示例，欢迎社区提交更多例程
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使用Python、C、TypeScript以及Java作为示例，欢迎社区提交更多例程
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### python
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### Python
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```python
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table = 'fZodR9XQDSUm21yCkr6zBqiveYah8bt4xsWpHnJE7jL5VG3guMTKNPAwcF' # 码表
@@ -197,3 +197,44 @@ console.log(bvcode.av2bv(170001));
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BV17x411w7KC
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170001
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```
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### Java
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```java
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/**
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* 算法来自：https://www.zhihu.com/question/381784377/answer/1099438784
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*/
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public class Util {
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private static final String TABLE = "fZodR9XQDSUm21yCkr6zBqiveYah8bt4xsWpHnJE7jL5VG3guMTKNPAwcF";
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private static final int[] S = new int[]{11, 10, 3, 8, 4, 6};
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private static final int XOR = 177451812;
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private static final long ADD = 8728348608L;
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private static final Map<Character, Integer> MAP = new HashMap<>();
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static {
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for (int i = 0; i < 58; i++) {
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MAP.put(TABLE.charAt(i), i);
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}
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}
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public static String aidToBvid(int aid) {
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long x = (aid ^ XOR) + ADD;
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char[] chars = new char[]{'B', 'V', '1', ' ', ' ', '4', ' ', '1', ' ', '7', ' ', ' '};
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for (int i = 0; i < 6; i++) {
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int pow = (int) Math.pow(58, i);
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long i1 = x / pow;
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int index = (int) (i1 % 58);
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chars[S[i]] = TABLE.charAt(index);
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}
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return String.valueOf(chars);
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}
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public static int bvidToAid(String bvid) {
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long r = 0;
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for (int i = 0; i < 6; i++) {
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r += MAP.get(bvid.charAt(S[i])) * Math.pow(58, i);
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}
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return (int) ((r - ADD) ^ XOR);
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}
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}
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```