docs: add docs for calendar toolbox

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---
title: Calendar Toolbox API
---
## 包结构概览
库的代码组织在基础包 `com.onixbyte.calendar` 下,结构如下:
| 包 | 描述 |
|---|---|
| `com.onixbyte.calendar` | 根日历对象 |
| `com.onixbyte.calendar.component` | iCalendar 组件(VEVENT、VTODO 等) |
| `com.onixbyte.calendar.component.property` | 组件级属性 |
| `com.onixbyte.calendar.property` | 日历级属性 |
| `com.onixbyte.calendar.parameter` | iCalendar 属性参数 |
| `com.onixbyte.calendar.recurrence` | 重复规则类型 |
| `com.onixbyte.calendar.value` | 值类型 |
| `com.onixbyte.calendar.util` | 格式化工具类 |
---
## Calendar
表示 iCalendarRFC 5545VCALENDAR 容器的顶层对象。
```java
Calendar calendar = Calendar.builder()
.withCalendarScale(...)
.withMethod(...)
.withProductIdentifier(...)
.withVersion(...)
.withOwner(...)
.withPrimaryCalendar(...)
.withPublishedTTL(...)
.withCalendarDescription(...)
.withCalendarName(...)
.withCalendarId(...)
.withCustomProperties(...)
.withComponents(event, todo, ...)
.build();
String icsContent = calendar.formatted();
```
### 日历属性
所有日历级属性位于 `com.onixbyte.calendar.property`,实现 `CalendarProperty` 接口。
| 类 | iCalendar 属性 | 描述 |
|---|---|---|
| `CalendarScale` | `CALSCALE` | 日历系统(例如 GREGORIAN |
| `Method` | `METHOD` | iCalendar 方法(例如 PUBLISH、REQUEST |
| `ProductIdentifier` | `PRODID` | 日历的产品标识符 |
| `Version` | `VERSION` | iCalendar 版本(例如 2.0 |
| `Owner` | `X-OWNER` | 日历所有者 |
| `PrimaryCalendar` | `X-PRIMARY-CALENDAR` | 是否为主日历 |
| `PublishedTTL` | `X-PUBLISHED-TTL` | 已发布日历的生存时间 |
| `CalendarDescription` | `X-CALENDAR-DESC` | 日历描述 |
| `CalendarName` | `X-CALENDAR-NAME` | 日历名称 |
| `CalendarId` | `X-CALENDAR-ID` | 日历标识符 |
| `CustomCalendarProperty` | `X-*` | 自定义日历属性 |
自定义属性使用 Builder 创建:
```java
var customProp = CustomCalendarProperty.builder()
.withParameters(...)
.build("X-MY-PROPERTY", "my-value");
```
> 注意:自定义属性名称**必须**以 `X-` 开头。
---
## 组件
组件是 iCalendar 对象的核心实体。每个组件实现 `CalendarComponent` 接口,并在 `BEGIN:TYPE``END:TYPE` 定界符之间渲染。
### EventVEVENT
表示一个预定的活动/事件。
```java
Event event = Event.builder()
.withDateTimeStamp(dtstamp) // 必需
.withUniqueIdentifier(uid) // 必需
.withDateTimeStart(dtstart)
.withDateTimeEnd(dtend) // 与 duration 互斥
.withDuration(duration) // 与 dtend 互斥
.withSummary(summary)
.withDescription(description)
.withClassification(classification)
.withDateTimeCreated(dateTimeCreated)
.withGeographicPosition(geoPos)
.withLastModified(lastModified)
.withLocation(location)
.withOrganiser(organiser)
.withPriority(priority)
.withSequenceNumber(seqNumber)
.withStatus(status)
.withTimeTransparency(transparency)
.withUniformResourceLocator(url)
.withRecurrenceId(recurrenceId)
.withRecurrenceRule(rrule)
.withAttachments(attachments)
.withAttendees(attendees)
.withCategories(categories)
.withComments(comments)
.withContacts(contacts)
.withExceptionDateTimes(exDates)
.withRequestStatuses(statuses)
.withRelated(related)
.withResources(resources)
.withRecurrenceDateTimes(rDates)
.build();
```
### TodoVTODO
表示待办事项或任务。
```java
Todo todo = Todo.builder()
.withDateTimeStamp(dtstamp) // 必需
.withUniqueIdentifier(uid) // 必需
.withSummary(summary)
.withDateTimeStart(dtstart)
.withDateTimeDue(due) // 与 duration 互斥
.withDuration(duration) // 与 due 互斥
.withDateTimeCompleted(completed)
.withPercentComplete(percent)
.withClassification(classification)
.withDateTimeCreated(created)
.withDescription(description)
.withGeographicPosition(geoPos)
.withLastModified(lastModified)
.withLocation(location)
.withOrganiser(organiser)
.withPriority(priority)
.withSequenceNumber(seq)
.withStatus(status)
.withRecurrenceId(recurId)
.withRecurrenceRule(rrule)
.withUniformResourceLocator(url)
.withAttachments(attachments)
.withAttendees(attendees)
.withCategories(categories)
.withComments(comments)
.withContacts(contacts)
.withExceptionDateTimes(exDates)
.withRequestStatuses(statuses)
.withRelatedToList(related)
.withResources(resources)
.withRecurrenceDateTimes(rDates)
.build();
```
### JournalVJOURNAL
表示日记条目或笔记。
```java
Journal journal = Journal.builder()
.withDateTimeStamp(dtstamp) // 必需
.withUniqueIdentifier(uid) // 必需
.withSummary(summary)
.withClassification(classification)
.withDateTimeCreated(created)
.withDateTimeStart(dtstart)
.withLastModified(lastModified)
.withOrganiser(organiser)
.withRecurrenceId(recurId)
.withSequenceNumber(seq)
.withStatus(status)
.withUniformResourceLocator(url)
.withRecurrenceRule(rrule)
.withAttachments(attachments)
.withAttendees(attendees)
.withCategories(categories)
.withComments(comments)
.withContacts(contacts)
.withDescriptions(descriptions)
.withExceptionDateTimes(exDates)
.withRelatedToList(related)
.withRecurrenceDate(rDates)
.withRequestStatuses(statuses)
.build();
```
### FreeBusyVFREEBUSY
表示空闲/忙碌时间信息。
```java
FreeBusy freeBusy = FreeBusy.builder()
.withDateTimeStamp(dtstamp) // 必需
.withUniqueIdentifier(uid) // 必需
.withContact(contact)
.withDateTimeStart(dtstart)
.withDateTimeEnd(dtend)
.withOrganiser(organiser)
.withUniformResourceLocator(url)
.withAttendees(attendees)
.withComments(comments)
.withFreeBusyTimes(freeBusyTimes)
.withRequestStatuses(statuses)
.build();
```
### TimeZoneVTIMEZONE
定义时区规则,包括标准时间和夏令时转换。
```java
TimeZone timezone = TimeZone.builder()
.withTimeZoneIdentifier(tzId)
.withLastModified(lastModified)
.withTimeZoneUrl(tzUrl)
.withTimeZoneProperties(standardProp, daylightProp)
.build();
```
时区属性定义实际的转换规则:
```java
TimeZoneProperty standard = TimeZoneProperty.builder()
.withDateTimeStart(dtstart)
.withTimeZoneOffsetTo(offsetTo)
.withTimeZoneOffsetFrom(offsetFrom)
.withRecurrenceRule(rrule)
.withTimeZoneNames(tzName)
.buildStandard(); // 或 buildDaylight()
TimeZoneProperty daylight = TimeZoneProperty.builder()
.withDateTimeStart(dtstart)
.withTimeZoneOffsetTo(offsetTo)
.withTimeZoneOffsetFrom(offsetFrom)
.buildDaylight();
```
### AlarmVALARM
定义闹钟/提醒通知。支持三种闹钟类型:
```java
// 音频闹钟
Alarm audioAlarm = Alarm.builder()
.withTrigger(trigger)
.withDuration(duration)
.withRepeatCount(repeatCount)
.withAttachments(audioAttachment)
.buildAudio();
// 显示闹钟
Alarm displayAlarm = Alarm.builder()
.withTrigger(trigger)
.withDescription(description) // 必需
.withDuration(duration)
.withRepeatCount(repeatCount)
.buildDisplay();
// 邮件闹钟
Alarm emailAlarm = Alarm.builder()
.withTrigger(trigger)
.withDescription(description) // 必需
.withSummary(summary) // 必需
.withAttendees(attendees) // 必需
.withDuration(duration)
.withRepeatCount(repeatCount)
.buildEmail();
```
---
## 组件属性
组件属性位于 `com.onixbyte.calendar.component.property`,实现 `ComponentProperty` 接口。
| 类 | iCalendar 属性 | 描述 |
|---|---|---|
| `Action` | `ACTION` | 闹钟操作类型(AUDIO、DISPLAY、EMAIL |
| `Attachment` | `ATTACH` | 文档附件 |
| `Attendee` | `ATTENDEE` | 事件/任务参与者 |
| `Categories` | `CATEGORIES` | 类别或标签 |
| `Classification` | `CLASS` | 访问分类(PUBLIC、PRIVATE、CONFIDENTIAL |
| `Comment` | `COMMENT` | 评论 |
| `Contact` | `CONTACT` | 联系信息 |
| `DateTimeCompleted` | `COMPLETED` | 完成日期时间 |
| `DateTimeCreated` | `CREATED` | 创建日期时间 |
| `DateTimeDue` | `DUE` | 截止日期时间 |
| `DateTimeEnd` | `DTEND` | 结束日期时间 |
| `DateTimeStamp` | `DTSTAMP` | 日期时间戳 |
| `DateTimeStart` | `DTSTART` | 开始日期时间 |
| `Description` | `DESCRIPTION` | 描述 |
| `ExceptionDateTimes` | `EXDATE` | 例外日期时间 |
| `FreeBusyTime` | `FREEBUSY` | 空闲/忙碌时间段 |
| `GeographicPosition` | `GEO` | 地理位置(纬度/经度) |
| `LastModified` | `LAST-MODIFIED` | 最后修改日期时间 |
| `Location` | `LOCATION` | 地点 |
| `Organiser` | `ORGANIZER` | 组织者 |
| `PercentComplete` | `PERCENT-COMPLETE` | 完成百分比 |
| `Priority` | `PRIORITY` | 优先级 |
| `RecurrenceDateTimes` | `RDATE` | 重复日期时间 |
| `RecurrenceId` | `RECURRENCE-ID` | 重复实例标识符 |
| `RecurrenceRule` | `RRULE` | 重复规则 |
| `RelatedTo` | `RELATED-TO` | 相关组件引用 |
| `RepeatCount` | `REPEAT` | 闹钟重复次数 |
| `RequestStatus` | `REQUEST-STATUS` | 请求状态 |
| `Resources` | `RESOURCES` | 资源 |
| `SequenceNumber` | `SEQUENCE` | 序列号(修订版本) |
| `Status` | `STATUS` | 组件状态(TENTATIVE、CONFIRMED、CANCELLED 等) |
| `Summary` | `SUMMARY` | 标题或摘要 |
| `TimeTransparency` | `TRANSP` | 时间透明度(OPAQUE、TRANSPARENT |
| `TimeZoneIdentifier` | `TZID` | 时区标识符 |
| `TimeZoneName` | `TZNAME` | 时区名称 |
| `TimeZoneOffsetFrom` | `TZOFFSETFROM` | 相对于 UTC 的时区偏移(原) |
| `TimeZoneOffsetTo` | `TZOFFSETTO` | 相对于 UTC 的时区偏移(目标) |
| `TimeZoneUrl` | `TZURL` | 时区 URL |
| `Trigger` | `TRIGGER` | 闹钟触发器 |
| `UniformResourceLocator` | `URL` | 关联 URL |
| `UniqueIdentifier` | `UID` | 唯一标识符 |
| `CustomComponentProperty` | `X-*` | 自定义组件属性 |
---
## 参数
参数位于 `com.onixbyte.calendar.parameter`,为组件属性提供额外限定。
| 类 | iCalendar 参数 | 描述 |
|---|---|---|
| `AlarmTriggerRelationship` | `RELATED` | 触发器关联(START、END |
| `AlternateTextRepresentation` | `ALTREP` | 替代文本 URI |
| `CalendarUserType` | `CUTYPE` | 日历用户类型(INDIVIDUAL、GROUP、RESOURCE 等) |
| `CommonName` | `CN` | 通用名称 |
| `Delegatees` | `DELEGATED-TO` | 受托人 |
| `Delegators` | `DELEGATED-FROM` | 委托人 |
| `DirectoryEntryReference` | `DIR` | 目录条目 URI |
| `FormatType` | `FMTTYPE` | 格式类型(MIME 类型) |
| `FreeBusyTimeType` | `FBTYPE` | 空闲/忙碌时间类型 |
| `InlineEncoding` | `ENCODING` | 内联编码(BASE64 |
| `Language` | `LANGUAGE` | 语言 |
| `Membership` | `MEMBER` | 组成员 |
| `ParticipationRole` | `ROLE` | 参与角色(CHAIR、REQ-PARTICIPANT 等) |
| `ParticipationStatus` | `PARTSTAT` | 参与状态(ACCEPTED、DECLINED 等) |
| `RecurrenceIdentifierRange` | `RANGE` | 重复范围(THISANDPRIOR、THISANDFUTURE |
| `RelationshipType` | `RELTYPE` | 关系类型(PARENT、CHILD、SIBLING |
| `RsvpExpectation` | `RSVP` | RSVP 期望(TRUE、FALSE |
| `SentBy` | `SENT-BY` | 发送者 |
| `TimeZoneIdentifier` | `TZID` | 时区标识符 |
| `ValueDataType` | `VALUE` | 值数据类型(DATE、DATE-TIME 等) |
---
## 递归类型
位于 `com.onixbyte.calendar.recurrence`
| 类 | 描述 |
|---|---|
| `Frequency` | 重复频率常量(DAILY、WEEKLY、MONTHLY、YEARLY),用于重复规则 |
| `WeekdayNum` | 重复规则的星期序号(例如第 2 个星期一) |
---
## 值类型
位于 `com.onixbyte.calendar.value`
| 类 | 描述 |
|---|---|
| `FreeBusyTimeValue` | 表示空闲/忙碌时间值 |
| `PeriodOfTime` | 表示一个时间段,包含开始和结束 |
| `PropertyValue` | 属性的基础值类型 |
| `UtcOffset` | UTC 偏移值(例如 `-05:00``+01:00` |
---
## 格式化输出
所有组件和属性都提供 `formatted()` 方法,返回符合 iCalendar 规范的字符串。`Calendar.formatted()` 方法生成完整的 `.ics` 输出,包含 `BEGIN:VCALENDAR`/`END:VCALENDAR`
```java
String ics = calendar.formatted();
// BEGIN:VCALENDAR
// CALSCALE:GREGORIAN
// METHOD:PUBLISH
// ...
// END:VCALENDAR
```