java实现随机生成UUID
java实现随机生成UUID
publicclassIDGenerator{ privatestaticlongnum=0; /** *随机生成UUID *@return */ publicstaticsynchronizedStringgetUUID(){ UUIDuuid=UUID.randomUUID(); Stringstr=uuid.toString(); StringuuidStr=str.replace("-",""); returnuuidStr; } /** *根据字符串生成固定UUID *@paramname *@return */ publicstaticsynchronizedStringgetUUID(Stringname){ UUIDuuid=UUID.nameUUIDFromBytes(name.getBytes()); Stringstr=uuid.toString(); StringuuidStr=str.replace("-",""); returnuuidStr; } /** *根据日期生成长整型id *@paramargs */ publicstaticsynchronizedlonggetLongId(){ Stringdate=DateUtil.getDate2FormatString(newDate(),"yyyyMMddHHmmssS"); System.out.println("原始id="+date); if(num>=99)num=0l; ++num; if(num<10){ date=date+00+num; }else{ date+=num; } returnLong.valueOf(date); } }
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