/*
* All content copyright Terracotta, Inc., unless otherwise indicated. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
*/
package com.xxl.job.admin.core.cron;
import java.io.Serializable;
import java.text.ParseException;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.SortedSet;
import java.util.StringTokenizer;
import java.util.TimeZone;
import java.util.TreeSet;
/**
* Provides a parser and evaluator for unix-like cron expressions. Cron
* expressions provide the ability to specify complex time combinations such as
* "At 8:00am every Monday through Friday" or "At 1:30am every
* last Friday of the month".
* <P>
* Cron expressions are comprised of 6 required fields and one optional field
* separated by white space. The fields respectively are described as follows:
*
* <table cellspacing="8">
* <tr>
* <th align="left">Field Name</th>
* <th align="left"> </th>
* <th align="left">Allowed Values</th>
* <th align="left"> </th>
* <th align="left">Allowed Special Characters</th>
* </tr>
* <tr>
* <td align="left"><code>Seconds</code></td>
* <td align="left"> </th>
* <td align="left"><code>0-59</code></td>
* <td align="left"> </th>
* <td align="left"><code>, - * /</code></td>
* </tr>
* <tr>
* <td align="left"><code>Minutes</code></td>
* <td align="left"> </th>
* <td align="left"><code>0-59</code></td>
* <td align="left"> </th>
* <td align="left"><code>, - * /</code></td>
* </tr>
* <tr>
* <td align="left"><code>Hours</code></td>
* <td align="left"> </th>
* <td align="left"><code>0-23</code></td>
* <td align="left"> </th>
* <td align="left"><code>, - * /</code></td>
* </tr>
* <tr>
* <td align="left"><code>Day-of-month</code></td>
* <td align="left"> </th>
* <td align="left"><code>1-31</code></td>
* <td align="left"> </th>
* <td align="left"><code>, - * ? / L W</code></td>
* </tr>
* <tr>
* <td align="left"><code>Month</code></td>
* <td align="left"> </th>
* <td align="left"><code>0-11 or JAN-DEC</code></td>
* <td align="left"> </th>
* <td align="left"><code>, - * /</code></td>
* </tr>
* <tr>
* <td align="left"><code>Day-of-Week</code></td>
* <td align="left"> </th>
* <td align="left"><code>1-7 or SUN-SAT</code></td>
* <td align="left"> </th>
* <td align="left"><code>, - * ? / L #</code></td>
* </tr>
* <tr>
* <td align="left"><code>Year (Optional)</code></td>
* <td align="left"> </th>
* <td align="left"><code>empty, 1970-2199</code></td>
* <td align="left"> </th>
* <td align="left"><code>, - * /</code></td>
* </tr>
* </table>
* <P>
* The '*' character is used to specify all values. For example, "*"
* in the minute field means "every minute".
* <P>
* The '?' character is allowed for the day-of-month and day-of-week fields. It
* is used to specify 'no specific value'. This is useful when you need to
* specify something in one of the two fields, but not the other.
* <P>
* The '-' character is used to specify ranges For example "10-12" in
* the hour field means "the hours 10, 11 and 12".
* <P>
* The ',' character is used to specify additional values. For example
* "MON,WED,FRI" in the day-of-week field means "the days Monday,
* Wednesday, and Friday".
* <P>
* The '/' character is used to specify increments. For example "0/15"
* in the seconds field means "the seconds 0, 15, 30, and 45". And
* "5/15" in the seconds field means "the seconds 5, 20, 35, and
* 50". Specifying '*' before the '/' is equivalent to specifying 0 is
* the value to start with. Essentially, for each field in the expression, there
* is a set of numbers that can be turned on or off. For seconds and minutes,
* the numbers range from 0 to 59. For hours 0 to 23, for days of the month 0 to
* 31, and for months 0 to 11 (JAN to DEC). The "/" character simply helps you turn
* on every "nth" value in the given set. Thus "7/6" in the
* month field only turns on month "7", it does NOT mean every 6th
* month, please note that subtlety.
* <P>
* The 'L' character is allowed for the day-of-month and day-of-week fields.
* This character is short-hand for "last", but it has different
* meaning in each of the two fields. For example, the value "L" in
* the day-of-month field means "the last day of the month" - day 31
* for January, day 28 for February on non-leap years. If used in the
* day-of-week field by itself, it simply means "7" or
* "SAT". But if used in the day-of-week field after another value, it
* means "the last xxx day of the month" - for example "6L"
* means "the last friday of the month". You can also specify an offset
* from the last day of the month, such as "L-3" which would mean the third-to-last
* day of the calendar month. <i>When using the 'L' option, it is important not to
* specify lists, or ranges of values, as you'll get confusing/unexpected results.</i>
* <P>
* The 'W' character is allowed for the day-of-month field. This character
* is used to specify the weekday (Monday-Friday) nearest the given day. As an
* example, if you were to specify "15W" as the value for the
* day-of-month field, the meaning is: "the nearest weekday to the 15th of
* the month". So if the 15th is a Saturday, the trigger will fire on
* Friday the 14th. If the 15th is a Sunday, the trigger will fire on Monday the
* 16th. If the 15th is a Tuesday, then it will fire on Tuesday the 15th.
* However if you specify "1W" as the value for day-of-month, and the
* 1st is a Saturday, the trigger will fire on Monday the 3rd, as it will not
* 'jump' over the boundary of a month's days. The 'W' character can only be
* specified when the day-of-month is a single day, not a range or list of days.
* <P>
* The 'L' and 'W' characters can also be combined for the day-of-month
* expression to yield 'LW', which translates to "last weekday of the
* month".
* <P>
* The '#' character is allowed for the day-of-week field. This character is
* used to specify "the nth" XXX day of the month. For example, the
* value of "6#3" in the day-of-week field means the third Friday of
* the month (day 6 = Friday and "#3" = the 3rd one in the month).
* Other examples: "2#1" = the first Monday of the month and
* "4#5" = the fifth Wednesday of the month. Note that if you specify
* "#5" and there is not 5 of the given day-of-week in the month, then
* no firing will occur that month. If the '#' character is used, there can
* only be one expression in the day-of-week field ("3#1,6#3" is
* not valid, since there are two expressions).
* <P>
* <!--The 'C' character is allowed for the day-of-month and day-of-week fields.
* This character is short-hand for "calendar". This means values are
* calculated against the associated calendar, if any. If no
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xxl-job-admin-oracle.zip （370个子文件） 
CronExpression.class 24KB XxlJobServiceImpl.class 16KB XxlJobTrigger.class 10KB JobLogController.class 10KB JobInfoController.class 9KB JobGroupController.class 8KB UserController.class 7KB JobScheduleHelper$1.class 7KB JobScheduleHelper.class 7KB EmailJobAlarm.class 6KB XxlJobInfo.class 5KB IndexController.class 5KB JobCompleteHelper.class 5KB JobRegistryHelper$3.class 5KB JobFailMonitorHelper$1.class 4KB LoginService.class 4KB JobCodeController.class 4KB JobLogReportHelper$1.class 4KB XxlJobAdminConfig.class 4KB JobTriggerPoolHelper.class 4KB XxlJobCompleter.class 4KB ExecutorRouteConsistentHash.class 4KB JobRegistryHelper.class 4KB ExecutorRouteLFU.class 4KB ExecutorRouteStrategyEnum.class 4KB XxlJobLog.class 3KB XxlJobScheduler.class 3KB JobApiController.class 3KB JobScheduleHelper$2.class 3KB ExecutorRouteLRU.class 3KB ExecutorRouteBusyover.class 3KB WebExceptionResolver.class 3KB JobCompleteHelper$3.class 3KB ExecutorRouteFailover.class 3KB I18nUtil.class 3KB JacksonUtil.class 3KB JobTriggerPoolHelper$3.class 3KB JobAlarmer.class 3KB PermissionInterceptor.class 3KB CookieUtil.class 3KB LocalCacheUtil.class 2KB ExecutorRouteRound.class 2KB XxlJobGroup.class 2KB CookieInterceptor.class 2KB XxlJobLogDao.class 2KB ScheduleTypeEnum.class 2KB JobCompleteHelper$4.class 2KB MisfireStrategyEnum.class 2KB XxlJobUser.class 2KB JobFailMonitorHelper.class 2KB TriggerTypeEnum.class 2KB JobLogReportHelper.class 2KB XxlJobLogGlue.class 2KB JobRegistryHelper$4.class 2KB FtlUtil.class 2KB AdminBizImpl.class 2KB ExecutorRouteLFU$1.class 2KB WebMvcConfig.class 2KB JobRegistryHelper$5.class 2KB XxlJobRegistry.class 1KB XxlJobInfoDao.class 1KB XxlJobLogReport.class 1KB ExecutorBizTest.class 1KB LocalCacheUtil$LocalCacheData.class 1KB ExecutorRouteRandom.class 1KB AbstractSpringMvcTest.class 1KB XxlJobGroupDao.class 1KB JobRegistryHelper$2.class 1KB JobCompleteHelper$2.class 1KB XxlJobInfoDaoTest.class 1KB JobTriggerPoolHelper$2.class 1KB JobTriggerPoolHelper$1.class 1KB XxlJobRegistryDao.class 1KB JobRegistryHelper$1.class 1KB JobCompleteHelper$1.class 1KB XxlJobService.class 1KB ExecutorRouteLast.class 1KB XxlJobRegistryDaoTest.class 1KB AdminBizTest.class 1KB XxlJobLogGlueDaoTest.class 1KB ExecutorRouteFirst.class 1KB XxlJobGroupDaoTest.class 1KB XxlJobLogDaoTest.class 1KB JacksonUtilTest.class 1KB I18nUtilTest.class 946B JobInfoControllerTest.class 922B XxlJobUserDao.class 885B ExecutorRouter.class 802B XxlJobLogReportDao.class 730B XxlJobAdminApplication.class 726B XxlJobLogGlueDao.class 638B PermissionLimit.class 513B XxlJobException.class 491B ValueSet.class 345B JobAlarm.class 231B .classpath 1KB bootstrap.min.css 119KB bootstrap.min.css 119KB AdminLTE.min.css 104KB AdminLTE.min.css 104KB共 370 条
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资源评论
zhjyrer2022-07-29资源很实用，对我启发很大，有很好的参考价值，内容详细。
zhao4211701172022-01-03用户下载后在一定时间内未进行评价，系统默认好评。- LIJIAN12362022-09-23感谢资源主的分享，这个资源对我来说很有用，内容描述详尽，值得借鉴。
- 壹壹壹壹壹壹DWL2023-04-21资源很实用，内容详细，值得借鉴的内容很多，感谢分享。
