Question

我需要执行HMACSHA256加密，请帮帮我;

 sha256 = MessageDigest.getInstance("HMACSHA1"); //I get exception in this line (No algorithm found)

Answer 1

Mac hmacSha256 = Mac.getInstance("hmacSHA256");

哈希和Mac-ing不是加密。

Answer 2

尝试：

sha256 = MessageDigest.getInstance("HMAC-SHA1");