新编码算法

https://572327713.iteye.com/admin/blogs/2434187

try {
			byte[] sourceBytes = new byte[8];
			if (id < 100000000) {
				int2bytes(sourceBytes, id);
			} else {
				sourceBytes[0] = (byte) ((id >> 24) & 0xFF);
				sourceBytes[1] = (byte) ((id >> 16) & 0xFF);
				sourceBytes[2] = (byte) ((id >> 8) & 0xFF);
				sourceBytes[3] = (byte) ((id) & 0xFF);
				sourceBytes[4] = Byte.MAX_VALUE;
				sourceBytes[5] = Byte.MAX_VALUE;
				sourceBytes[6] = Byte.MAX_VALUE;
				sourceBytes[7] = Byte.MAX_VALUE;
			}
			byte[] encryptedBytes = blowfish.encrypt(sourceBytes);

			char[] base64Chars = Base64.encode(encryptedBytes);
			int i;
			for (i = 0; i < base64Chars.length; i++) {
				if (base64Chars[i] == '=') {
					break; // = only appear at end, so i is the ending
				} else if (base64Chars[i] == '+') {
					base64Chars[i] = '-';
				} else if (base64Chars[i] == '/') {
					base64Chars[i] = '_';
				}
			}
			return new String(base64Chars, 0, i);
		} catch (Exception e) {
			logger.error("encode error, id=" + id, e);
		}
		return null;