名詞解釋

時刻：時刻是時間上的某個瞬間，，或是時間軸上的某個點。時刻可以作為時間間隔的起點和終點

時代：一個時代是用作測量其他時刻的起源的瞬間。時代是在1970-01-01T00:00:00Z。時代之后的時刻具有正值，而時代之前的時刻具有負(fù)值。

java 8類說明

java.time包含的api都是基于iso 8601的。

1.java.time.LocalDate：LocalDate是一個不可變的類，它表示默認(rèn)格式(yyyy-MM-dd)的日期

2.java.time.LocalTime:LocalTime是一個不可變的類，它的實例代表一個符合人類可讀格式的時間，默認(rèn)格式是hh:mm:ss.zzz

ISO字符替代說明

[Y]?represents?a?digit?used?in?the?time?element?“year”;
[M]?represents?a?digit?used?in?the?time?element?“month”;
[D]?represents?a?digit?used?in?the?time?element?“day”;
[w]?represents?a?digit?used?in?the?time?element?“week”;
[h]?represents?a?digit?used?in?the?time?element?“hour”;
[m]?represents?a?digit?used?in?the?time?element?“minute”;
[s]?represents?a?digit?used?in?the?time?element?“second”;
[n]?represents?a?digit?from?a?positive?integer?or?zero;
[±]?represents?a?plus?sign?[+]?if?in?combination?with?the?following?element?a?positive?value?or?zero?needs?to?be?represented?(in?this?case,?unless?explicitly?stated?otherwise,?the?plus?sign?shall?not?be?omitted),?or?a?minus?sign?[?]?if?in?combination?with?the?following?element?a?negative?value?needs?to?be?represented.
In?addition?the?following?convention?applies:
[_]?When?any?of?the?characters?representing?a?digit?is?underlined,?it?represents?zero?or?more?digits
in?the?corresponding?date?and?time?representation.
Other?characters?in?the?date?and?time?format?representations?are?copied?in?the?date?and?time
representations.

時間格式收錄

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