java实现随机生成UUID
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public class IDGenerator {
private static long num= 0 ;
/**
* 随机生成UUID
* @return
*/
public static synchronized String getUUID(){
UUID uuid=UUID.randomUUID();
String str = uuid.toString();
String uuidStr=str.replace( "-" , "" );
return uuidStr;
}
/**
* 根据字符串生成固定UUID
* @param name
* @return
*/
public static synchronized String getUUID(String name){
UUID uuid=UUID.nameUUIDFromBytes(name.getBytes());
String str = uuid.toString();
String uuidStr=str.replace( "-" , "" );
return uuidStr;
}
/**
* 根据日期生成长整型id
* @param args
*/
public static synchronized long getLongId(){
String date=DateUtil.getDate2FormatString( new Date(), "yyyyMMddHHmmssS" );
System.out.println( "原始id=" +date);
if (num>= 99 ) num=0l;
++num;
if (num< 10 ) {
date=date+ 00 +num;
} else {
date+=num;
}
return Long.valueOf(date);
}
}
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