/** 解密字符串 */
public String decrypt(String c, String key) {
byte[] tmp = Base64Encoder.base64ToByteArray(c);
return Encoding.utf8ToString(decrypt(tmp, key));
}
/** 加密字符串 */
public String encrypt(String s, String key) {
byte[] tmp = Encoding.stringToUtf8(s);
return Base64Encoder.byteArrayToBase64(encrypt(tmp, key));
}