package com.by4cloud.platformx.business.utils;

import java.util.concurrent.atomic.AtomicLong;
import java.text.DecimalFormat;

public class ItemGeneratorUtil {

	private static final AtomicLong counter = new AtomicLong(0);
	private static final String PREFIX = "ITEM";
	// 定义格式：至少3位，不足补0
	private static final DecimalFormat formatter = new DecimalFormat("000");

	public static String nextId() {
		long num = counter.incrementAndGet();
		return PREFIX + formatter.format(num);
	}
	public static void main(String[] args) {
		System.out.println(nextId()); // ITEM001
		System.out.println(nextId()); // ITEM002
		System.out.println(nextId()); // ITEM003
	}
}