MAC算法之消息摘要算法HmacMD5的实现

import javax.crypto.KeyGenerator; import javax.crypto.Mac; import javax.crypto.SecretKey; import javax.xml.bind.annotation.adapters.HexBinaryAdapter;  public class Main {    static String src = "Hello,sahadev!";    public static void main(String[] args) {     HmacMD5();   }    public static void HmacMD5() {     try {       // 获取密钥生成器       KeyGenerator keyGenerator = KeyGenerator.getInstance("HmacMD5");       // 生成密钥       SecretKey generateKey = keyGenerator.generateKey();        // 获取"Message Authentication Code" (MAC) algorithm实例       Mac instance = Mac.getInstance(generateKey.getAlgorithm());       // 根据生产的密钥初始化该实例       instance.init(generateKey);        // 加密消息       byte[] doFinal = instance.doFinal(src.getBytes());       // 输出加密后的消息       System.out.println("HmacMD5 : "           + new HexBinaryAdapter().marshal(doFinal));      } catch (Exception e) {       e.printStackTrace();     }   }  }