谁能将这段nodejs代码翻译成ja代码？

mac.init(key);

String sk = "xxx";

hmacsha256解密 hmacsha256加密算法hmacsha256解密 hmacsha256加密算法


hmacsha256解密 hmacsha256加密算法


KeyGenerator generator = KeyGenerator.getInstance(“HmacSHA256”);

SecretKey key = generator.generateKey();

byte[] bytes = mac.doFinal(str.getBytes());

StringBuffer = new StringBuffeMac mac = Mac.getInstance(key.getAlgorithm());r();

for (int i = 0; i < bytes.length; i++) {

int t = bytes[i];

.append(Integer.toString(t >> 4 & 0xF, 16)).append(

Integer.toString(t & 0xF, 16));

}String signature = .toString();