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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