JAVA MD5加密Base64转码

private String md5(String str) {

String s = str;

if (s == null) {

return "";

} else {

String value = null;

MessageDigest md5 = null;

try {

md5 = MessageDigest.getInstance("MD5");

} catch (NoSuchAlgorithmException ex) {

log.error(ex.getMessage(), ex);

}

sun.misc.BASE64Encoder baseEncoder = new sun.misc.BASE64Encoder();

try {

value = baseEncoder.encode(md5.digest(s.getBytes("utf-8")));

} catch (Exception ex) {

log.error(ex.getMessage(), ex);

}

return value;

}

}