java MD5加密

public String toMD5() {

MessageDigest messageDigest = null;

try {

messageDigest = MessageDigest.getInstance("MD5");

messageDigest.reset();

messageDigest.update(this.originalString.getBytes("UTF-8"));

} catch (NoSuchAlgorithmException e) {

System.out.println("NoSuchAlgorithmException caught!");

} catch (UnsupportedEncodingException e) {

ExceptionMessage.save(e);

}

byte[] byteArray = messageDigest.digest();

StringBuilder md5StrBuff = new StringBuilder();

for (int i = 0; i < byteArray.length; i++) {

if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)

md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));

else

md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));

}

return md5StrBuff.toString();

}