Java, create Hmac SHA1 like in php

private String sha1hash(String sInput){
String sReturn = "";
String sSecret = "1234";

try {
Mac mac = Mac.getInstance("HmacSHA1");
SecretKeySpec secret = new SecretKeySpec(sSecret.getBytes(),"HmacSHA1");
mac.init(secret);
byte[] digest = mac.doFinal(sInput.getBytes());

StringBuffer sb = new StringBuffer();

for (byte b : digest) {
sb.append(String.format("%02x", b));
}

sReturn = sb.toString();
} catch (Exception e) {
//TODO: handle this exception
}
return sReturn;
}