Java時間相關內容學習(7) TimeZone簡介

本章介紹TimeZone。

TimeZone 簡介

TimeZone 表示時區位移量，也可以計算夏令時。

在操作 Date, Calendar等表示日期/時間的對象時，經常會用到TimeZone；因為不同的時區，時間不同。

下面說說TimeZone對象的 2種常用建立方式。

1 擷取預設的TimeZone對象

使用方法：

TimeZone tz = TimeZone.getDefault()

2 使用 getTimeZone(String id) 方法擷取TimeZone對象

使用方法：

// 擷取 “GMT+08:00”對應的時區

TimeZone china = TimeZone.getTimeZone("GMT+:08:00");

// 擷取 “中國/重慶”對應的時區

TimeZone chongqing = TimeZone.getTimeZone("Asia/Chongqing");

關於 getTimeZone(String id) 這種方式支援的全部id參數的取值，可以通過以下方式尋找：

String[] ids = TimeZone.getAvailableIDs();

for (String id:ids)

System.out.printf(id+", ");

輸出結果：

Etc/GMT+12, Etc/GMT+11, Pacific/Midway, Pacific/Niue, Pacific/Pago_Pago, Pacific/Samoa, US/Samoa, America/Adak, America/Atka, Etc/GMT+10, HST, Pacific/Honolulu, Pacific/Johnston, Pacific/Rarotonga, Pacific/Tahiti, SystemV/HST10, US/Aleutian, US/Hawaii, Pacific/Marquesas, AST, America/Anchorage, America/Juneau, America/Nome, America/Sitka, America/Yakutat, Etc/GMT+9, Pacific/Gambier, SystemV/YST9, SystemV/YST9YDT, US/Alaska, America/Dawson, America/Ensenada, America/Los_Angeles, America/Metlakatla, America/Santa_Isabel, America/Tijuana, America/Vancouver, America/Whitehorse, Canada/Pacific, Canada/Yukon, Etc/GMT+8, Mexico/BajaNorte, PST, PST8PDT, Pacific/Pitcairn, SystemV/PST8, SystemV/PST8PDT, US/Pacific, US/Pacific-New, America/Boise, America/Cambridge_Bay, America/Chihuahua, America/Creston, America/Dawson_Creek, America/Denver, America/Edmonton, America/Hermosillo, America/Inuvik, America/Mazatlan, America/Ojinaga, America/Phoenix, America/Shiprock, America/Yellowknife, Canada/Mountain, Etc/GMT+7, MST, MST7MDT, Mexico/BajaSur, Navajo, PNT, SystemV/MST7, SystemV/MST7MDT, US/Arizona, US/Mountain, America/Bahia_Banderas, America/Belize, America/Cancun, America/Chicago, America/Costa_Rica, America/El_Salvador, America/Guatemala, America/Indiana/Knox, America/Indiana/Tell_City, America/Knox_IN, America/Managua, America/Matamoros, America/Menominee, America/Merida, America/Mexico_City, America/Monterrey, America/North_Dakota/Beulah, America/North_Dakota/Center, America/North_Dakota/New_Salem, America/Rainy_River, America/Rankin_Inlet, America/Regina, America/Resolute, America/Swift_Current, America/Tegucigalpa, America/Winnipeg, CST, CST6CDT, Canada/Central, Canada/East-Saskatchewan, Canada/Saskatchewan, Chile/EasterIsland, Etc/GMT+6, Mexico/General, Pacific/Easter, Pacific/Galapagos, SystemV/CST6, SystemV/CST6CDT, US/Central, US/Indiana-Starke, America/Atikokan, America/Bogota, America/Cayman, America/Coral_Harbour, America/Detroit, America/Fort_Wayne, America/Grand_Turk, America/Guayaquil, America/Havana, America/Indiana/Indianapolis, America/Indiana/Marengo, America/Indiana/Petersburg, America/Indiana/Vevay, America/Indiana/Vincennes, America/Indiana/Winamac, America/Indianapolis, America/Iqaluit, America/Jamaica, America/Kentucky/Louisville, America/Kentucky/Monticello, America/Lima, America/Louisville, America/Montreal, America/Nassau, America/New_York, America/Nipigon, America/Panama, America/Pangnirtung, America/Port-au-Prince, America/Thunder_Bay, America/Toronto, Canada/Eastern, Cuba, EST, EST5EDT, Etc/GMT+5, IET, Jamaica, SystemV/EST5, SystemV/EST5EDT, US/East-Indiana, US/Eastern, US/Michigan, America/Caracas, America/Anguilla, America/Antigua, America/Argentina/San_Luis, America/Aruba, America/Asuncion, America/Barbados, America/Blanc-Sablon, America/Boa_Vista, America/Campo_Grande, America/Cuiaba, America/Curacao, America/Dominica, America/Eirunepe, America/Glace_Bay, America/Goose_Bay, America/Grenada, America/Guadeloupe, America/Guyana, America/Halifax, America/Kralendijk, America/La_Paz, America/Lower_Princes, America/Manaus, America/Marigot, America/Martinique, America/Moncton, America/Montserrat, America/Port_of_Spain, America/Porto_Acre, America/Porto_Velho, America/Puerto_Rico, America/Rio_Branco, America/Santiago, America/Santo_Domingo, America/St_Barthelemy, America/St_Kitts, America/St_Lucia, America/St_Thomas, America/St_Vincent, America/Thule, America/Tortola, America/Virgin, Antarctica/Palmer, Atlantic/Bermuda, Brazil/Acre, Brazil/West, Canada/Atlantic, Chile/Continental, Etc/GMT+4, PRT, SystemV/AST4, SystemV/AST4ADT, America/St_Johns, CNT, Canada/Newfoundland, AGT, America/Araguaina, America/Argentina/Buenos_Aires, America/Argentina/Catamarca, America/Argentina/ComodRivadavia, America/Argentina/Cordoba, America/Argentina/Jujuy, America/Argentina/La_Rioja, America/Argentina/Mendoza, America/Argentina/Rio_Gallegos, America/Argentina/Salta, America/Argentina/San_Juan, America/Argentina/Tucuman, America/Argentina/Ushuaia, America/Bahia, America/Belem, America/Buenos_Aires, America/Catamarca, America/Cayenne, America/Cordoba, America/Fortaleza, America/Godthab, America/Jujuy, America/Maceio, America/Mendoza, America/Miquelon, America/Montevideo, America/Paramaribo, America/Recife, America/Rosario, America/Santarem, America/Sao_Paulo, Antarctica/Rothera, Atlantic/Stanley, BET, Brazil/East, Etc/GMT+3, America/Noronha, Atlantic/South_Georgia, Brazil/DeNoronha, Etc/GMT+2, America/Scoresbysund, Atlantic/Azores, Atlantic/Cape_Verde, Etc/GMT+1, Africa/Abidjan, Africa/Accra, Africa/Bamako, Africa/Banjul, Africa/Bissau, Africa/Casablanca, Africa/Conakry, Africa/Dakar, Africa/El_Aaiun, Africa/Freetown, Africa/Lome, Africa/Monrovia, Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, Africa/Timbuktu, America/Danmarkshavn, Atlantic/Canary, Atlantic/Faeroe, Atlantic/Faroe, Atlantic/Madeira, Atlantic/Reykjavik, Atlantic/St_Helena, Eire, Etc/GMT, Etc/GMT+0, Etc/GMT-0, Etc/GMT0, Etc/Greenwich, Etc/UCT, Etc/UTC, Etc/Universal, Etc/Zulu, Europe/Belfast, Europe/Dublin, Europe/Guernsey, Europe/Isle_of_Man, Europe/Jersey, Europe/Lisbon, Europe/London, GB, GB-Eire, GMT, GMT0, Greenwich, Iceland, Portugal, UCT, UTC, Universal, WET, Zulu, Africa/Algiers, Africa/Bangui, Africa/Brazzaville, Africa/Ceuta, Africa/Douala, Africa/Kinshasa, Africa/Lagos, Africa/Libreville, Africa/Luanda, Africa/Malabo, Africa/Ndjamena, Africa/Niamey, Africa/Porto-Novo, Africa/Tunis, Africa/Windhoek, Arctic/Longyearbyen, Atlantic/Jan_Mayen, CET, ECT, Etc/GMT-1, Europe/Amsterdam, Europe/Andorra, Europe/Belgrade, Europe/Berlin, Europe/Bratislava, Europe/Brussels, Europe/Budapest, Europe/Copenhagen, Europe/Gibraltar, Europe/Ljubljana, Europe/Luxembourg, Europe/Madrid, Europe/Malta, Europe/Monaco, Europe/Oslo, Europe/Paris, Europe/Podgorica, Europe/Prague, Europe/Rome, Europe/San_Marino, Europe/Sarajevo, Europe/Skopje, Europe/Stockholm, Europe/Tirane, Europe/Vaduz, Europe/Vatican, Europe/Vienna, Europe/Warsaw, Europe/Zagreb, Europe/Zurich, MET, Poland, ART, Africa/Blantyre, Africa/Bujumbura, Africa/Cairo, Africa/Gaborone, Africa/Harare, Africa/Johannesburg, Africa/Kigali, Africa/Lubumbashi, Africa/Lusaka, Africa/Maputo, Africa/Maseru, Africa/Mbabane, Africa/Tripoli, Asia/Amman, Asia/Beirut, Asia/Damascus, Asia/Gaza, Asia/Hebron, Asia/Istanbul, Asia/Jerusalem, Asia/Nicosia, Asia/Tel_Aviv, CAT, EET, Egypt, Etc/GMT-2, Europe/Athens, Europe/Bucharest, Europe/Chisinau, Europe/Helsinki, Europe/Istanbul, Europe/Kiev, Europe/Mariehamn, Europe/Nicosia, Europe/Riga, Europe/Simferopol, Europe/Sofia, Europe/Tallinn, Europe/Tiraspol, Europe/Uzhgorod, Europe/Vilnius, Europe/Zaporozhye, Israel, Libya, Turkey, Africa/Addis_Ababa, Africa/Asmara, Africa/Asmera, Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Juba, Africa/Kampala, Africa/Khartoum, Africa/Mogadishu, Africa/Nairobi, Antarctica/Syowa, Asia/Aden, Asia/Baghdad, Asia/Bahrain, Asia/Kuwait, Asia/Qatar, Asia/Riyadh, EAT, Etc/GMT-3, Europe/Kaliningrad, Europe/Minsk, Indian/Antananarivo, Indian/Comoro, Indian/Mayotte, Asia/Riyadh87, Asia/Riyadh88, Asia/Riyadh89, Mideast/Riyadh87, Mideast/Riyadh88, Mideast/Riyadh89, Asia/Tehran, Iran, Asia/Baku, Asia/Dubai, Asia/Muscat, Asia/Tbilisi, Asia/Yerevan, Etc/GMT-4, Europe/Moscow, Europe/Samara, Europe/Volgograd, Indian/Mahe, Indian/Mauritius, Indian/Reunion, NET, W-SU, Asia/Kabul, Antarctica/Mawson, Asia/Aqtau, Asia/Aqtobe, Asia/Ashgabat, Asia/Ashkhabad, Asia/Dushanbe, Asia/Karachi, Asia/Oral, Asia/Samarkand, Asia/Tashkent, Etc/GMT-5, Indian/Kerguelen, Indian/Maldives, PLT, Asia/Calcutta, Asia/Colombo, Asia/Kolkata, IST, Asia/Kathmandu, Asia/Katmandu, Antarctica/Vostok, Asia/Almaty, Asia/Bishkek, Asia/Dacca, Asia/Dhaka, Asia/Qyzylorda, Asia/Thimbu, Asia/Thimphu, Asia/Yekaterinburg, BST, Etc/GMT-6, Indian/Chagos, Asia/Rangoon, Indian/Cocos, Antarctica/Davis, Asia/Bangkok, Asia/Ho_Chi_Minh, Asia/Hovd, Asia/Jakarta, Asia/Novokuznetsk, Asia/Novosibirsk, Asia/Omsk, Asia/Phnom_Penh, Asia/Pontianak, Asia/Saigon, Asia/Vientiane, Etc/GMT-7, Indian/Christmas, VST, Antarctica/Casey, Asia/Brunei, Asia/Choibalsan, Asia/Chongqing, Asia/Chungking, Asia/Harbin, Asia/Hong_Kong, Asia/Kashgar, Asia/Krasnoyarsk, Asia/Kuala_Lumpur, Asia/Kuching, Asia/Macao, Asia/Macau, Asia/Makassar, Asia/Manila, Asia/Shanghai, Asia/Singapore, Asia/Taipei, Asia/Ujung_Pandang, Asia/Ulaanbaatar, Asia/Ulan_Bator, Asia/Urumqi, Australia/Perth, Australia/West, CTT, Etc/GMT-8, Hongkong, PRC, Singapore, Australia/Eucla, Asia/Dili, Asia/Irkutsk, Asia/Jayapura, Asia/Pyongyang, Asia/Seoul, Asia/Tokyo, Etc/GMT-9, JST, Japan, Pacific/Palau, ROK, ACT, Australia/Adelaide, Australia/Broken_Hill, Australia/Darwin, Australia/North, Australia/South, Australia/Yancowinna, AET, Antarctica/DumontDUrville, Asia/Yakutsk, Australia/ACT, Australia/Brisbane, Australia/Canberra, Australia/Currie, Australia/Hobart, Australia/Lindeman, Australia/Melbourne, Australia/NSW, Australia/Queensland, Australia/Sydney, Australia/Tasmania, Australia/Victoria, Etc/GMT-10, Pacific/Chuuk, Pacific/Guam, Pacific/Port_Moresby, Pacific/Saipan, Pacific/Truk, Pacific/Yap, Australia/LHI, Australia/Lord_Howe, Antarctica/Macquarie, Asia/Sakhalin, Asia/Vladivostok, Etc/GMT-11, Pacific/Efate, Pacific/Guadalcanal, Pacific/Kosrae, Pacific/Noumea, Pacific/Pohnpei, Pacific/Ponape, SST, Pacific/Norfolk, Antarctica/McMurdo, Antarctica/South_Pole, Asia/Anadyr, Asia/Kamchatka, Asia/Magadan, Etc/GMT-12, Kwajalein, NST, NZ, Pacific/Auckland, Pacific/Fiji, Pacific/Funafuti, Pacific/Kwajalein, Pacific/Majuro, Pacific/Nauru, Pacific/Tarawa, Pacific/Wake, Pacific/Wallis, NZ-CHAT, Pacific/Chatham, Etc/GMT-13, MIT, Pacific/Apia, Pacific/Enderbury, Pacific/Fakaofo, Pacific/Tongatapu, Etc/GMT-14, Pacific/Kiritimati

例如，建立上面第2個列印值“Etc/GMT+11”對應的TimeZone。方法如下：

TimeZone tz = TimeZone.getTimeZone("Etc/GMT+11");

TimeZone的函數介面

// 建構函式TimeZone()     Object                           clone()synchronized static String[]     getAvailableIDs()synchronized static String[]     getAvailableIDs(int offsetMillis)int                              getDSTSavings()synchronized static TimeZone     getDefault()final String                     getDisplayName(Locale locale)String                           getDisplayName(boolean daylightTime, int style, Locale locale)final String                     getDisplayName()final String                     getDisplayName(boolean daylightTime, int style)String                           getID()abstract int                     getOffset(int era, int year, int month, int day, int dayOfWeek, int timeOfDayMillis)int                              getOffset(long time)abstract int                     getRawOffset()synchronized static TimeZone     getTimeZone(String id)boolean                          hasSameRules(TimeZone timeZone)abstract boolean                 inDaylightTime(Date time)synchronized static void         setDefault(TimeZone timeZone)void                             setID(String id)abstract void                    setRawOffset(int offsetMillis)abstract boolean                 useDaylightTime()