public static void main(String[] args) {
        String numString = "000001";
        for (int i = 0; i < 5; i++) {
            numString = scNum(numString);
            System.out.println(numString);
        }
    }
    
    public static String scNum(String zl) {
        NumberFormat format = NumberFormat.getInstance();
        format.setGroupingUsed(false);
        format.setMinimumIntegerDigits(zl.length()); //设置数值的整数部分允许的最小位数.
        return format.format(Long.parseLong(zl) + 1);
    }

------解决方案--------------------

用StringUtils.leftPad