import javax.crypto.Mac;

import javax.crypto.spec.SecretKeySpec;

public class HmacSHA256Example {

   public static void main(String[] args) {

      try {

         String secretKey = "easypay!KICCTEST"; // 테스트용 KEY

         String message = "1234|abcd";// 해시할 메시지값

         Mac sha256_HMAC = Mac.getInstance( "HmacSHA256" );

         SecretKeySpec secret_key = new SecretKeySpec( secretKey.getBytes(), "HmacSHA256" );

         sha256_HMAC.init( secret_key );

         String hash = sha256_HMAC.doFinal( message.getBytes() );

         // hash값을 HexString 으로 변환하세요.

         System.out.println( hash );

      }

      catch ( Exception e ) {

         System.out.println( "Error" );

      }

   }

}