Method decode

manager/src/main/java/server/BucketCommands.java:488–516

Base64解码 @param s 编码好的base64 @return 结果

(String s)

     * @return 结果
     */
    public static String decode(String s) {
        int index = 0;
        StringBuilder strBuff = new StringBuilder();
        StringBuilder resultBuff = new StringBuilder();
        while (true) {
            //补零
            if (index == s.length() || s.charAt(index) == '=') {
                int zeroCount = 8 - strBuff.length();
                for (int i = 0; i < zeroCount; i++) {
                    strBuff.append('0');
                }
                index = -1;
            }
            //更新缓冲区字符
            while (index != -1 && strBuff.length() < 8 && index < s.length()) {
                int chatIndex = getCharIndexInBaseChars(s.charAt(index++));
                strBuff.append(get6BitStr(chatIndex));
            }
            //从缓冲区取8个字符
            String temp2 = strBuff.substring(0, 8);
            int temp10 = Integer.valueOf(temp2, 2);
            resultBuff.append((char) temp10);
            strBuff.delete(0, 8);
            //判断是否结束
            if (index == -1)
                break;
        }
        return resultBuff.toString().trim();
    }

    /**
     * 得到某个字符，在编码表的位置