JAVA 1.7以上实现数据数字加密代码

private Mac createMac() {
Mac mac;
try {
mac = javax.crypto.Mac.getInstance("HmacSHA1");
mac.init(secretKey);
} catch (GeneralSecurityException e) {
e.printStackTrace();
throw new IllegalArgumentException(e);
}
return mac;
}

public String sign(byte[] data) {
Mac mac = createMac();
String encodedSign = java.util.Base64.Encoder.encodeToString(mac.doFinal(data));
return this.accessKey + ":" + encodedSign;
}