import javax.crypto.KeyGenerator;

import javax.crypto.Mac;

import javax.crypto.SecretKey;

import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Hex;

import org.bouncycastle.crypto.digests.MD5Digest;

import org.bouncycastle.crypto.macs.HMac;

import org.bouncycastle.crypto.params.KeyParameter;

public class MACdemo

{

public static void main(String[] args) throws Exception 

{

System.out.println(jdkHmacMD5("测试 test!"));

System.out.println(bcHmacMD5("测试 test!"));

}

public static String jdkHmacMD5(String srcString) throws Exception 

{

KeyGenerator keyGenerator = KeyGenerator.getInstance("HmacMD5");

SecretKey secretKey = keyGenerator.generateKey();

byte[] key = secretKey.getEncoded();

SecretKeySpec secretKeySpec = new SecretKeySpec(key, "HmacMD5");

Mac mac = Mac.getInstance(secretKeySpec.getAlgorithm());

mac.init(secretKeySpec);

byte[] encodedByte = mac.doFinal(srcString.getBytes());

return Hex.encodeHexString(encodedByte);

}

public static String bcHmacMD5(String srcString) throws Exception 

{

HMac hMac = new HMac(new MD5Digest());

hMac.init(new KeyParameter(org.bouncycastle.util.encoders.Hex.encode("jafdafafdafddf".getBytes())));

hMac.update(srcString.getBytes(), 0, srcString.getBytes().length);

byte[] encodedByte = new byte[hMac.getMacSize()];

hMac.doFinal(encodedByte, 0);

return org.bouncycastle.util.encoders.Hex.toHexString(encodedByte);

}

}