package com.szwl.service.impl; import com.szwl.model.entity.TCoinOrder; import com.szwl.mapper.TCoinOrderMapper; import com.szwl.service.TCoinOrderService; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import org.springframework.stereotype.Service; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; import java.util.Random; /** *

* 服务实现类 *

* * @author wuhs * @since 2023-08-29 */ @Service public class TCoinOrderServiceImpl extends ServiceImpl implements TCoinOrderService { @Override public String initSn(Long equipmentId) { StringBuilder number = new StringBuilder(); if (equipmentId != null) { Random random = new Random(); /** * 6位随机 */ for (int i = 0; i < 6; i++) { number.append(String.valueOf(random.nextInt(10))); } /** * 设备id */ number.append(equipmentId.toString()); /** * 日期 */ number.append(new SimpleDateFormat("yyyyMMddHHmmss").format(new Date())); } return number.toString(); } }