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【笔记】Java生成UUID
source link: https://feiju12138.github.io/2022/07/16/Java%E7%94%9F%E6%88%90UUID/
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通用唯一识别码（英语：Universally Unique Identifier，缩写：UUID）是用于计算机体系中以识别信息的一个128位标识符。
根据标准方法生成，不依赖中央机构的注册和分配，UUID具有唯一性，这与其他大多数编号方案不同。重复UUID码概率接近零，可以忽略不计。(维基百科)
生成UUID
UUID.randomUUID().toString();
生成没有分隔符的32位数字
UUID.randomUUID().toString().replace("-", "");
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