Java and PHP hmac_sha1 results are different, ask the master to help

Recently encountered HMAC_SHA1 cross-language encryption problem, only provided to the Java encryption file, did not provide PHP, I use PHP hmac_sha1 built-in functions, get the SIG encryption results are different, welcome the expert to help provide the corresponding PHP code, provide Java class as follows

Welcome to add qq:847036019

Public abstract class Coder {
public static final String Key_sha = "SHA";
public static final String key_md5 = "MD5";
public static final char hexdigits[] = {' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ',
' A ', ' B ', ' C ', ' d ', ' e ', ' f '};
public static final String Key_mac = "HmacSHA1";
public static byte[] decryptBASE64 (String key) throws Exception {
Return (new Base64decoder ()). Decodebuffer (key);
}
/**
* Initialize HMAC key
*/
public static String Initmackey () throws Exception {
Keygenerator keygenerator = keygenerator.getinstance (KEY_MAC);

Secretkey Secretkey = Keygenerator.generatekey ();
Return encryptBASE64 (secretkey.getencoded ());
}

/**
* HMAC Encryption
*/
public static byte[] Encrypthmac (byte[] data, String key) throws Exception {

Secretkey Secretkey = new Secretkeyspec (decryptBASE64 (key), KEY_MAC);
Mac Mac = Mac.getinstance (Secretkey.getalgorithm ());
Mac.init (Secretkey);

return mac.dofinal (data);

}
public static void Main (string[] args) {
try {
String param = ';

String Appkey = ';

                     byte[] bytes = Coder.encrypthmac ((param). GetBytes ("Utf-8"), Appkey);
                   String sig = new BigInteger (bytes). toString ();
                   System.out.println ("SIG:" + sig);

} catch (Exception e) {
TODO auto-generated Catch block
E.printstacktrace ();
}
}
}
PHP I use the corresponding encryption that PHP comes with the function

$sig = Hash_hmac ("SHA1", $str, $key) The results of the sig from PHP are always different from that of Java, asking the master to help write the same code as the Java cryptographic value sig

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Java and PHP hmac_sha1 results are different, ask the master to help