工具类

public class ParamUtil {//检查是否为数字private static final Pattern pattern = Pattern.compile("[0-9]*");//检查是否为01-99之间的数字private static final Pattern pattern2 = Pattern.compile("^([1-9]|0[1-9]|[1-9][0-9])$");//检查是否大于0小于等于100的整数private static final Pattern pattern1 = Pattern.compile("^100$|^([1-9]|[1-9]\\d)$");public static <T> ReqBody<T> checkRequest(ReqBody<T> reqBody) {if (reqBody == null) {throw new GlobalErrorInfoException(StockErrorInfoEnum.REQBODY_EMPTY);}if (reqBody.getParam() == null) {throw new GlobalErrorInfoException(StockErrorInfoEnum.PARAM_EMPTY);}return reqBody;}/*** 填充0** @param number      需要填充的数* @param totalDigits 填充的总位数* @return*/public static String filling(String number, Integer totalDigits) {boolean flag = StringUtils.isEmpty(number) && (null == totalDigits || totalDigits < 2);if (flag) {return null;}String newNumBer = number;int length = newNumBer.length();if (length < totalDigits) {for (int i = 1; i <= totalDigits - length; i++) {newNumBer = "0".concat(newNumBer);}}return newNumBer;}/*** 检查字符串是否为数字** @param str* @return*/public static boolean checkStrIsNum(String str) {if(StringUtils.isBlank(str)){return true;}Matcher isNum = pattern2.matcher(str);return isNum.matches();}/*** 检查字符是否为大于0小于等于100** @param smartPi* @return*/public static boolean checkSmartPi(String smartPi) {if(StringUtils.isBlank(smartPi)){return true;}Matcher isNum = pattern1.matcher(smartPi);return isNum.matches();}
}

调用示例：

/* 前面补0，凑成2位数。如：9补0后是：09 */
String department = ParamUtil.filling(department2, 2);