HMACSHA256加密算法 java实现_hmacsha256 java实现-优快云博客

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

public class HMACSHA256 {
   /**
   * 将加密后的字节数组转换成字符串
   *
   * @param b 字节数组
   * @return 字符串
   */
   public static String byteArrayToHexString(byte[] b) {
       StringBuilder hs = new StringBuilder();
       String stmp;
       for (int n = 0; b != null && n < b.length; n++) {
           stmp = Integer.toHexString(b[n] & 0XFF);
           if (stmp.length() == 1)
               hs.append('0');
           hs.append(stmp);
       }
       return hs.toString().toLowerCase();
   }

   /**
   * sha256_HMAC加密
   *
   * @param message 消息
   * @param secret 秘钥
   * @return 加密后字符串
   */
   public static String sha256_HMAC(String message, String secret) {
       String hash = "";
       try {
           Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
           SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(), "HmacSHA256");
           sha256_HMAC.init(secret_key);
           byte[] bytes = sha256_HMAC.doFinal(message.getBytes());
           hash = byteArrayToHexString(bytes);
       } catch (Exception e) {
           System.out.println("Error HmacSHA256 ===========" + e.getMessage());
       }
       return hash;
   }

   public static void main(String[] args) {
       String secret="aaa0711zzz";
       System.err.println(sha256_HMAC(secret,"asd"));
   }
}