JAVA icu4j TimeZone 获取 ULocale

时间: 2024-01-18 21:02:18 浏览: 185

获取时区，根据时区做 UTC时间到本地时间之间转换

3星 · 编辑精心推荐

unit uTimeZonesMgr; interface uses Windows, SysUtils, Classes, Registry, DateUtils; type {* 用于读取时区注册表TZI（长度为44）的属性值，存储时区信息 *} PRegTZIInfo = ^TRegTZIInfo; TRegTZIInfo = record Bias: Longint; StandardBias: Longint; DaylightBias: Longint; StandardDate: TSystemTime; DaylightDate: TSystemTime; end; {* 单个时区管理对象 *} TTimeZone = class private FTimeZoneName: string; //时区的显示名 FDisplay: string; //夏令时的名字 FDlt: string; //时区标准名字 FStd: string; //是Time zone information的缩写，描述时区的一些重要信息 FTZI: PRegTZIInfo; function GetSelfTimeZoneInformation: TTimeZoneInformation; public constructor Create; destructor Destroy; override; function UTCToLocalDateTime(const AUTC: TDateTime; var ALocalDateTime: TDateTime): Boolean; function LocalDateTimeToUTC(const ALocalDateTime: TDateTime; var AUTC: TDateTime): Boolean; public property TimeZoneName: string read FTimeZoneName write FTimeZoneName; property Display: string read FDisplay write FDisplay; property Dlt: string read FDlt write FDlt; property Std: string read FStd write FStd; property TZI: PRegTZIInfo read FTZI write FTZI; end; {* 所有时区管理对象 *} TTimeZones = class private FTimeZoneKeyPath: string; FTimeZoneList: TStringList; FDefaultTimeZone: TTimeZone; procedure CollectTimeZone; procedure DestoryTimeZones; procedure CheckISDefaultTimeZone(ATimeZone: TTimeZone); public constructor Create; destructor Destroy; override; function FindTimeZone(const ADisplay: string): TTimeZone; public property TimeZoneList: TStringList read FTimeZoneList; property DefaultTimeZone: TTimeZone read FDefaultTimeZone; end; implementation { TTimeZones } procedure TTimeZones.CheckISDefaultTimeZone(ATimeZone: TTimeZone); var DefaultTimeZone: TTimeZoneInformation; begin GetTimeZoneInformation(DefaultTimeZone); if (ATimeZone.TZI.Bias = DefaultTimeZone.Bias) and (ATimeZone.Std = DefaultTimeZone.StandardName) then FDefaultTimeZone := ATimeZone; end; procedure TTimeZones.CollectTimeZone; var reg, tempReg: TRegistry; tempKeyPath: string; tempTimeZoneStrings: TStrings; iCir: Integer; tempTimeZone: TTimeZone; begin reg := TRegistry.Create; try reg.RootKey := HKEY_LOCAL_MACHINE; reg.OpenKey(FTimeZoneKeyPath, False); tempTimeZoneStrings := TStringList.Create; try reg.GetKeyNames(tempTimeZoneStrings); for iCir := 0 to tempTimeZoneStrings.Count - 1 do begin tempKeyPath := FTimeZoneKeyPath + '\' + tempTimeZoneStrings.Strings[iCir]; tempReg := TRegistry.Create; try tempReg.RootKey := HKEY_LOCAL_MACHINE; tempReg.OpenKey(tempKeyPath, False); tempTimeZone := TTimeZone.Create; tempTimeZone.TimeZoneName := tempTimeZoneStrings.Strings[iCir]; tempTimeZone.Display := tempReg.ReadString('Display'); tempTimeZone.Std := tempReg.ReadString('Std'); tempTimeZone.Dlt := tempReg.ReadString('Dlt'); tempReg.ReadBinaryData('TZI', tempTimeZone.TZI^, SizeOf(TRegTZIInfo)); FTimeZoneList.AddObject(tempTimeZone.Display, tempTimeZone); if FDefaultTimeZone = nil then CheckISDefaultTimeZone(tempTimeZone); finally tempReg.CloseKey; tempReg.Free; end; end; finally tempTimeZoneStrings.Free; end; finally reg.CloseKey; reg.Free; end; end; constructor TTimeZones.Create; begin FTimeZoneKeyPath := '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones'; FTimeZoneList := TStringList.Create; FTimeZoneList.Sorted := True; FDefaultTimeZone := nil; CollectTimeZone; end; procedure TTimeZones.DestoryTimeZones; var iCir: Integer; tempTimeZone: TTimeZone; begin for iCir := 0 to FTimeZoneList.Count - 1 do begin tempTimeZone := TTimeZone(FTimeZoneList.Objects[iCir]); tempTimeZone.Free; end; FTimeZoneList.Clear; FTimeZoneList.Free; end; destructor TTimeZones.Destroy; begin DestoryTimeZones(); inherited; end; function TTimeZones.FindTimeZone(const ADisplay: string): TTimeZone; var iIndex: Integer; begin Result := nil; FTimeZoneList.Sort; if FTimeZoneList.Find(ADisplay, iIndex) then begin Result := TTimeZone(FTimeZoneList.Objects[iIndex]); end; end; { TTimeZone } constructor TTimeZone.Create; begin FTZI := GetMemory(SizeOf(TRegTZIInfo)); FillMemory(FTZI, SizeOf(TRegTZIInfo), 0); end; destructor TTimeZone.Destroy; begin FreeMemory(FTZI); inherited; end; function TTimeZone.GetSelfTimeZoneInformation: TTimeZoneInformation; begin GetTimeZoneInformation(Result); Result.Bias := TZI^.Bias; Result.StandardBias := TZI^.StandardBias; Result.StandardDate := TZI^.StandardDate; Result.DaylightBias := TZI^.DaylightBias; Result.DaylightDate := TZI^.DaylightDate; end; function TTimeZone.LocalDateTimeToUTC(const ALocalDateTime: TDateTime; var AUTC: TDateTime): Boolean; var tempLocalToLocal: TDateTime; iMilliSecond: Int64; begin Result := UTCToLocalDateTime(ALocalDateTime, tempLocalToLocal); if Result then begin if tempLocalToLocal > ALocalDateTime then begin iMilliSecond := MilliSecondsBetween(tempLocalToLocal, ALocalDateTime); AUTC := IncMilliSecond(ALocalDateTime, iMilliSecond * -1); end else begin iMilliSecond := MilliSecondsBetween(ALocalDateTime, tempLocalToLocal); AUTC := IncMilliSecond(ALocalDateTime, iMilliSecond); end; Result := True; end; end; function TTimeZone.UTCToLocalDateTime(const AUTC: TDateTime; var ALocalDateTime: TDateTime): Boolean; var TimeZone: TTimeZoneInformation; stUTC, stLC: SYSTEMTIME; begin Result := False; TimeZone := GetSelfTimeZoneInformation; DateTimeToSystemTime(AUTC, stUTC); if SystemTimeToTzSpecificLocalTime(@TimeZone, stUTC, stLC) then begin ALocalDateTime := SystemTimeToDateTime(stLC); Result := True; end; end; end.

对于您的问题，我可以回答：JAVA icu4j中可以使用TimeZone类来获取ULocale。您可以使用TimeZone.getAvailableIDs()方法来获取所有可用的时区ID，然后使用TimeZone.getTimeZone()方法将ULocale转换为时区对象。希望这能帮助您解决问题。

阅读全文

JAVA icu4j TimeZone 获取 ULocale

相关推荐

icu4j-70.jar

icu4j-2.6.1.jar

icu4jSample：icu4j的样本

java maven 导入 ICU4J

给我一个JAVA的 ICu4j 格式化新里拉的实例

给我一个JAVA的 ICu4j 格式化新里拉（TL）的实例

icu4j-3.4.4.jar

icu4j-52.1.jar

icu4j-4.6.zip

icu4j-58.2.jar

icu4j-3.8.1.jar

ICU4J-57.JAR

icu4j-58.1.jar

icu4j-52.1-sources.jar

【Java国际化框架深度对比】：ResourceBundle vs. ICU4J vs. JSTL的全面分析

JAVA icu4j TimeZone 获取 ULocale。 给出例子

Downloading from central: https://repo.maven.apache.org/maven2/com/ibm/icu/icu4j/70.1/icu4j-70.1.jar找不到应用

icu4j-70.1

jdk11没有ICU4J吗

最新推荐

Java实现调用jython执行python文件的方法

Angular实现MarcHayek简历展示应用教程

管理建模和仿真的文件

深入剖析：内存溢出背后的原因、预防及应急策略（专家版）

Java中如何对年月日时分秒的日期字符串作如下处理：如何日期分钟介于两个相连的半点之间，就将分钟数调整为前半点

Crossbow Spot最新更新 - 获取Chrome扩展新闻

"互动学习：行动中的多样性与论文攻读经历"

【Java内存管理终极指南】：一次性解决内存溢出、泄漏和性能瓶颈

c 语言return用法

量子管道网络优化与Python实现

JAVA icu4j TimeZone 获取 ULocale。给出例子