| New file | 
 |  |  | 
 |  |  | package com.dy.common.util; | 
 |  |  |  | 
 |  |  | import lombok.extern.slf4j.Slf4j; | 
 |  |  | import org.springframework.stereotype.Component; | 
 |  |  |  | 
 |  |  | import java.util.Calendar; | 
 |  |  |  | 
 |  |  | @Slf4j | 
 |  |  | @Component | 
 |  |  | public class IDLongGenerator { | 
 |  |  |  | 
 |  |  |    private static final Object synObj = new Object() ; | 
 |  |  |  | 
 |  |  |    private static final int yearLength = 4 ;//4:年度取四位, 3:年度取三位, 2:年度取两位, 1:年度取一位, 0:年度取0位 | 
 |  |  |  | 
 |  |  |    private static int add = 0 ; | 
 |  |  |    private static final int chengShu = 1000 ;//1000:三位自增量,即一秒钟可产生10000个ID | 
 |  |  |    private static final int maxAdd = 999 ; | 
 |  |  |    private static long last; | 
 |  |  |    //后缀 | 
 |  |  |    //在分布式系统中,例如多个数据中间件dataMw,多个系统都会向数据库中插入数据,用的都是此ID生成器, | 
 |  |  |    //此ID生成器在各个子系统中难免为同一类数据生成相同的ID,造成数据库插入因主键相同而报错, | 
 |  |  |    //所以设计此后缀,每个子系统后缀不同 | 
 |  |  |    private static int suffix = 0 ; | 
 |  |  |    private static final int noSuffix = 0 ; | 
 |  |  |  | 
 |  |  |    static { | 
 |  |  |       last = current() ; | 
 |  |  |    } | 
 |  |  |  | 
 |  |  |    /** | 
 |  |  |     *  2023 10 28 09 14 40 00000 | 
 |  |  |     * 长度19的ID,年度取两位,长度18的ID,年度取四位,17位数字超出了javascript的表数范围,javascript会表数不正确 | 
 |  |  |     */ | 
 |  |  |     public Long generate(){ | 
 |  |  |        synchronized (synObj){ | 
 |  |  |          //Long id = doGenerate() ; | 
 |  |  |          //log.info("产生ID = " + id); | 
 |  |  |          //return id ; | 
 |  |  |          return doGenerate() ; | 
 |  |  |       } | 
 |  |  |     } | 
 |  |  |    /** | 
 |  |  |     * 设置后缀,不同子系统设置不同的后缀 | 
 |  |  |     * @param suffix ID后缀,0到99 | 
 |  |  |     */ | 
 |  |  |    public static void setSuffix(int suffix) throws Exception{ | 
 |  |  |       if(suffix < 0 || suffix > 99){ | 
 |  |  |          throw new Exception("后缀只能是0到99的数字") ; | 
 |  |  |       } | 
 |  |  |       IDLongGenerator.suffix = suffix ; | 
 |  |  |    } | 
 |  |  |  | 
 |  |  |  | 
 |  |  |    /** | 
 |  |  |      * 得到今日开始的id(如: 230630 00000000000) | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |     public static Long generateTodayStartId(){ | 
 |  |  |        return (currentTodayStart() * chengShu) * 100 + noSuffix; | 
 |  |  |     } | 
 |  |  |      | 
 |  |  |     /** | 
 |  |  |      * 得到今日截止的id(如: 230630 24000000000) | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |     public static Long generateTodayEndId(){ | 
 |  |  |        return (currentTodayEnd() * chengShu) * 100 + noSuffix; | 
 |  |  |     } | 
 |  |  |      | 
 |  |  |      | 
 |  |  |     /** | 
 |  |  |      * 得到某日开始的id(如: 230630 00000000000) | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |     public static Long generateBeforeXDayStartId(int xday){ | 
 |  |  |        return (beforeXDayStart(xday) * chengShu) * 100 + noSuffix; | 
 |  |  |     } | 
 |  |  |      | 
 |  |  |     /** | 
 |  |  |      * 得到某日截止的id(如: 230630 24000000000) | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |     public static Long generateBeforeXDayEndId(int xday){ | 
 |  |  |        return (beforeXDayEnd(xday) * chengShu) * 100 + noSuffix; | 
 |  |  |     } | 
 |  |  |    | 
 |  |  |      | 
 |  |  |     /** | 
 |  |  |      * 得到某日开始的id(如: 230630 00000000000) | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |     public static Long generateOneDayStartId(int year, int month, int day){ | 
 |  |  |        return (currentOneDayStart(year, month, day) * chengShu) * 100 + suffix; | 
 |  |  |     } | 
 |  |  |      | 
 |  |  |     /** | 
 |  |  |      * 得到某日截止的id(如: 230630 24000000000) | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |     public static Long generateOneDayEndId(int year, int month, int day){ | 
 |  |  |        return (currentOneDayEnd(year, month, day) * chengShu) * 100 + suffix; | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |      | 
 |  |  |  | 
 |  |  |     /** | 
 |  |  |      * 执行生成 | 
 |  |  |      * @return ID 20231218 104504 06900 | 
 |  |  |      */ | 
 |  |  |     private Long doGenerate(){ | 
 |  |  |        long id ; | 
 |  |  |        long now = current() ; | 
 |  |  |        if(now != last){ | 
 |  |  |           //上次生成ID 与本次生成ID 不在同一秒内 | 
 |  |  |           last = now ; | 
 |  |  |           add = 0 ; | 
 |  |  |           id = last * chengShu + add++; | 
 |  |  |        }else{ | 
 |  |  |           //上次生成ID 与本次生成ID 在同一秒内 | 
 |  |  |           if(add >= maxAdd){ | 
 |  |  |              //附加量已经用尽 | 
 |  |  |              waitNextSecond(last) ;//等到下一秒 | 
 |  |  |              id = last * chengShu + add++ ;//返回上一秒生成的ID | 
 |  |  |             add = 0 ;//附加量归零,为下一秒准备 | 
 |  |  |           }else{ | 
 |  |  |              //附加量未用尽 | 
 |  |  |              id = last * chengShu + add++ ; | 
 |  |  |           } | 
 |  |  |        } | 
 |  |  |        return (id * 100) + suffix ; | 
 |  |  |     } | 
 |  |  |     /** | 
 |  |  |      * 等待下一秒到来 | 
 |  |  |      * @param last 上次时间(精确到秒) | 
 |  |  |      */ | 
 |  |  |     private void waitNextSecond(Long last){ | 
 |  |  |        try { | 
 |  |  |          Thread.sleep(10); | 
 |  |  |       } catch (InterruptedException ignored) { | 
 |  |  |       }finally{ | 
 |  |  |          long now = current() ; | 
 |  |  |          if(now == last){ | 
 |  |  |             waitNextSecond(last) ; | 
 |  |  |          } | 
 |  |  |       } | 
 |  |  |     } | 
 |  |  |  | 
 |  |  |     | 
 |  |  | 	 | 
 |  |  |     /** | 
 |  |  |      * 格式为 y*yMMddHHmmss | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |    private static long current(){ | 
 |  |  |       Calendar cal = Calendar.getInstance(); | 
 |  |  |       return (dealYear(cal.get(Calendar.YEAR))) * 10000000000L | 
 |  |  |       + (cal.get(Calendar.MONTH) + 1) * 100000000L | 
 |  |  |       + cal.get(Calendar.DAY_OF_MONTH) * 1000000L | 
 |  |  |       + cal.get(Calendar.HOUR_OF_DAY) * 10000L | 
 |  |  |       + cal.get(Calendar.MINUTE) * 100L | 
 |  |  |       + cal.get(Calendar.SECOND)  ; | 
 |  |  |    } | 
 |  |  |     | 
 |  |  | 	 | 
 |  |  |     /** | 
 |  |  |      * 格式为  | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |    private static long currentTodayStart(){ | 
 |  |  |       Calendar cal = Calendar.getInstance(); | 
 |  |  |       return (dealYear(cal.get(Calendar.YEAR))) * 10000000000L | 
 |  |  |       + (cal.get(Calendar.MONTH) + 1) * 100000000L  | 
 |  |  |       + cal.get(Calendar.DAY_OF_MONTH) * 1000000L ; | 
 |  |  |    } | 
 |  |  | 	 | 
 |  |  |     /** | 
 |  |  |      * 格式为  | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |    private static long currentTodayEnd(){ | 
 |  |  |       Calendar cal = Calendar.getInstance(); | 
 |  |  |       return (dealYear(cal.get(Calendar.YEAR))) * 10000000000L | 
 |  |  |       + (cal.get(Calendar.MONTH) + 1) * 100000000L  | 
 |  |  |       + cal.get(Calendar.DAY_OF_MONTH) * 1000000L  | 
 |  |  |       + 24 * 10000L ; | 
 |  |  |    } | 
 |  |  | 	 | 
 |  |  | 	 | 
 |  |  |     /** | 
 |  |  |      * 格式为  | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |    private static long currentOneDayStart(int year, int month, int day){ | 
 |  |  |       return (dealYear(year)) * 10000000000L | 
 |  |  |       + month * 100000000L  | 
 |  |  |       + day * 1000000L ; | 
 |  |  |    } | 
 |  |  | 	 | 
 |  |  |     /** | 
 |  |  |      * 格式为  | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |    private static long currentOneDayEnd(int year, int month, int day){ | 
 |  |  |       return (dealYear(year)) * 10000000000L | 
 |  |  |       + month * 100000000L  | 
 |  |  |       + day * 1000000L  | 
 |  |  |       + 24 * 10000L ; | 
 |  |  |    } | 
 |  |  | 	 | 
 |  |  |     /** | 
 |  |  |      * 格式为  | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |    private static long beforeXDayStart(int xday){ | 
 |  |  |       Calendar cal = Calendar.getInstance(); | 
 |  |  |       cal.add(Calendar.DATE, xday<=0?xday:-xday); | 
 |  |  |       return (dealYear(cal.get(Calendar.YEAR))) * 10000000000L | 
 |  |  |       + (cal.get(Calendar.MONTH) + 1) * 100000000L  | 
 |  |  |       + cal.get(Calendar.DAY_OF_MONTH) * 1000000L ; | 
 |  |  |    } | 
 |  |  | 	 | 
 |  |  |     /** | 
 |  |  |      * 格式为  | 
 |  |  |      * @return ID | 
 |  |  |      */ | 
 |  |  |    private static long beforeXDayEnd(int xday){ | 
 |  |  |       Calendar cal = Calendar.getInstance(); | 
 |  |  |       cal.add(Calendar.DATE, xday<=0?xday:-xday); | 
 |  |  |       return (dealYear(cal.get(Calendar.YEAR))) * 10000000000L | 
 |  |  |       + (cal.get(Calendar.MONTH) + 1) * 100000000L  | 
 |  |  |       + cal.get(Calendar.DAY_OF_MONTH) * 1000000L  | 
 |  |  |       + 24 * 10000L ; | 
 |  |  |    } | 
 |  |  |  | 
 |  |  |    /** | 
 |  |  |     * 处理年度 | 
 |  |  |     * @param year 年度 | 
 |  |  |     * @return 处理后的年度 | 
 |  |  |     */ | 
 |  |  |    private static int dealYear(int year){ | 
 |  |  |       if(yearLength == 0){ | 
 |  |  |          return 0 ; | 
 |  |  |       }else if(yearLength == 1){ | 
 |  |  |          return year % 10 ; | 
 |  |  |       }else if(yearLength == 2){ | 
 |  |  |          return year % 100 ; | 
 |  |  |       }else if(yearLength == 3){ | 
 |  |  |          return year % 1000 ; | 
 |  |  |       }else if(yearLength == 4){ | 
 |  |  |          return year ; | 
 |  |  |       }else{ | 
 |  |  |          return year ; | 
 |  |  |       } | 
 |  |  |    } | 
 |  |  |  | 
 |  |  | //   public static void main(String[] args){ | 
 |  |  | //      Calendar cal = Calendar.getInstance(); | 
 |  |  | //      System.out.println(cal.get(Calendar.MONTH) + 1) ; | 
 |  |  | // | 
 |  |  | //      IDLongGenerator o = new IDLongGenerator() ; | 
 |  |  | //      int total = 1 ; | 
 |  |  | //      for(int i = 0 ; i < total ; i++){ | 
 |  |  | //         System.out.println(o.generate()) ; | 
 |  |  | //      } | 
 |  |  | //      long start = System.currentTimeMillis() ; | 
 |  |  | //      long end = System.currentTimeMillis() ; | 
 |  |  | //      System.out.println("产生" + total + "ID用时" + (end - start) + "毫秒"); | 
 |  |  | // | 
 |  |  | //      Long todayStartId = IDLongGenerator.generateTodayStartId() ; | 
 |  |  | //      System.out.println("today start id:\n" + todayStartId); | 
 |  |  | //      Long todayEndId = IDLongGenerator.generateTodayEndId() ; | 
 |  |  | //      System.out.println("today end id:\n" + todayEndId); | 
 |  |  | // | 
 |  |  | // | 
 |  |  | //      Long beforeXDayStartId = IDLongGenerator.generateBeforeXDayStartId(3) ; | 
 |  |  | //      System.out.println("before3Day start id:\n" + beforeXDayStartId); | 
 |  |  | //      Long beforeXDayEndId = IDLongGenerator.generateBeforeXDayEndId(3) ; | 
 |  |  | //      System.out.println("before3Day end id:\n" + beforeXDayEndId); | 
 |  |  | // | 
 |  |  | // | 
 |  |  | //      Long oneDayStartId = IDLongGenerator.generateOneDayStartId(2023, 7, 9) ; | 
 |  |  | //      System.out.println("OneDay(2023-07-09) start id:\n" + oneDayStartId); | 
 |  |  | //      Long oneDayEndId = IDLongGenerator.generateOneDayEndId(2023, 7, 11) ; | 
 |  |  | //      System.out.println("OneDay(2023-07-11) end id:\n" + oneDayEndId); | 
 |  |  | //   } | 
 |  |  | 	 | 
 |  |  | } |