/*** 获得一个随机的字符串* * @param baseString 随机字符选取的样本* @param length 字符串的长度* @return 随机字符串*/public static String randomString(String baseString, int length) {final StringBuilder sb = new StringBuilder();if (length < 1) {length = 1;}int baseLength = baseString.length();for (int i = 0; i < length; i++) {int number = getRandom().nextInt(baseLength);sb.append(baseString.charAt(number));}return sb.toString();}