java生成自增编号数字的问题

SELECT max(no_value+0) FROM `jm_xx`

public String getOldNum(){
        String oldNum ="00000001";
        String maxOldNum = jmDocMapper.findMaxOldNum();
        if(null !=maxOldNum){
            int i = Integer.parseInt(maxOldNum)+1;
            //%nd 输出的整型宽度至少为n位，右对齐，%8d即宽度至少为8位，位数大于8则输出实际位数，0表示用0补齐
            oldNum = String.fORMat("%08d", i);
        }
    return oldNum;
}

package com.lyf.test;
public class Test2 {
    
    
    public static String getNewEquipmentNo(String equipmentType, String equipmentNo){
        String newEquipmentNo = equipmentType + "00001";
        
        if(equipmentNo != null && !equipmentNo.isEmpty()){
            int no = Integer.parseInt(equipmentNo);
            int newEquipment = ++no;
            newEquipmentNo = String.format(equipmentType + "%05d", newEquipment);
        }
        
        return newEquipmentNo;
    }
    public static void main(String[] args) {
        String equipmentNo = Test2.getNewEquipmentNo("SYXH", "00032");
        System.out.println("生成设备编号：" + equipmentNo);
    }
}