package com.by4cloud.platformx.business.utils;
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import java.util.concurrent.atomic.AtomicLong;
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import java.text.DecimalFormat;
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public class ItemGeneratorUtil {
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private static final AtomicLong counter = new AtomicLong(0);
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private static final String PREFIX = "ITEM";
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// 定义格式：至少3位，不足补0
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private static final DecimalFormat formatter = new DecimalFormat("000");
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public static String nextId() {
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long num = counter.incrementAndGet();
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return PREFIX + formatter.format(num);
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}
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public static void main(String[] args) {
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System.out.println(nextId()); // ITEM001
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System.out.println(nextId()); // ITEM002
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System.out.println(nextId()); // ITEM003
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}
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}
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