qq_39543482的博客

@Componentpublic class SerialNumberUtil { private static volatile SerialNumberUtil instance = null; private long workerId; //用ip地址最后几个字节标示 private long datacenterId = 0L; //可配置在proper...

@Componentpublic class OrderNumber implements Serializable { private static final long serialVersionUID = -8249764603117125748L; private final ReentrantLock prepareLock = new ReentrantLock...

//获取1000-9999之间的一个随机四位数int max = 9999;int min = 1000;//random.nextInt(max)表示生成[0,max]之间的随机数，然后对(max-min+1)取模int number = random.nextInt(max) % (max - min + 1) + min;效果：...