javaÉú³Éuuid
UUID(Universally Unique Identifier)È«¾ÖΨһ±êʶ·û,ÊÇÖ¸ÔÚһ̨»úÆ÷ÉÏÉú³ÉµÄÊý×Ö£¬Ëü±£Ö¤¶ÔÔÚͬһʱ¿ÕÖеÄËùÓлúÆ÷¶¼ÊÇΨһµÄ¡£°´ÕÕ¿ª·ÅÈí¼þ»ù½ð»á(OSF)Öƶ¨µÄ±ê×¼¼ÆË㣬Óõ½ÁËÒÔÌ«Íø¿¨µØÖ·¡¢ÄÉÃ뼶ʱ¼ä¡¢Ð¾Æ¬IDÂëºÍÐí¶à¿ÉÄܵÄÊý×Ö¡£ÓÉÒÔϼ¸²¿·ÖµÄ×éºÏ£ºµ±Ç°ÈÕÆÚºÍʱ¼ä(UUIDµÄµÚÒ»¸ö²¿·ÖÓëʱ¼äÓйأ¬Èç¹ûÄãÔÚÉú³ÉÒ»¸öUUIDÖ®ºó£¬¹ý¼¸ÃëÓÖÉú³ÉÒ»¸öUUID£¬ÔòµÚÒ»¸ö²¿·Ö²»Í¬£¬ÆäÓàÏàͬ)£¬Ê±ÖÓÐòÁУ¬È«¾ÖΨһµÄIEEE»úÆ÷ʶ±ðºÅ£¨Èç¹ûÓÐÍø¿¨£¬´ÓÍø¿¨»ñµÃ£¬Ã»ÓÐÍø¿¨ÒÔÆäËû·½Ê½»ñµÃ£©£¬UUIDµÄΨһȱÏÝÔÚÓÚÉú³ÉµÄ½á¹û´®»á±È½Ï³¤¡£
ÔÚJavaÖÐÉú³ÉUUIDÖ÷ÒªÓÐÒÔϼ¸ÖÖ·½Ê½:
JDK1.5
Èç¹ûʹÓõÄJDK1.5µÄ»°,ÄÇôÉú³ÉUUID±ä³ÉÁËÒ»¼þ¼òµ¥µÄÊÂ,ÒÔΪJDKʵÏÖÁËUUID:
java.util.UUID,Ö±½Óµ÷Óü´¿É.
UUID uuid = UUID.randomUUID();
String s = UUID.randomUUID().toString();//ÓÃÀ´Éú³ÉÊý¾Ý¿âµÄÖ÷¼üid·Ç³£²»´í¡£¡£
UUIDÊÇÓÉÒ»¸öÊ®ÁùλµÄÊý×Ö×é³É,±íÏÖ³öÀ´µÄÐÎʽÀýÈç
550E8400-E29B-11D4-A716-446655440000
//ÏÂÃæ¾ÍÊÇʵÏÖΪÊý¾Ý¿â»ñÈ¡Ò»¸öΨһµÄÖ÷¼üidµÄ´úÂë
public class UUIDGenerator {
public UUIDGenerator() {
}
/**
* »ñµÃÒ»¸öUUID
* @return String UUID
*/
public static String getUUID(){
String s = UUID.randomUUID().toString();
//È¥µô“-”·ûºÅ
return s.substring(0,8)+s.substring(9,13)+s.substring(14,18)+s.substring(19,23)+s.substring(24);
}
/**
* »ñµÃÖ¸¶¨ÊýÄ¿µÄUUID
* @param number int Ð
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double costNum =2;//µç·Ñƽ¾ùÈÕµçÁ¿
double amountNum =3; //µçÁ¿Æ½¾ùÈÕµçÁ¿
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////////////////////////////////////////////////½ÚµãÀà TreeNode.java //////////////////////////
package com.tree;
class TreeNode {//°ü·ÃÎÊȨÏÞ
long data ;
long x,y;
String adrr;
Tre ......
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