概述

自己在使用Java日志格式的時(shí)候，發(fā)現(xiàn)不好定義。所以本篇文章的主要目的是收集一些常用的日志格式，解說(shuō)每個(gè)字段代表的意思以及擴(kuò)充部分Java常用的時(shí)間類。

名詞解釋

時(shí)刻：時(shí)刻是時(shí)間上的某個(gè)瞬間，，或是時(shí)間軸上的某個(gè)點(diǎn)。時(shí)刻可以作為時(shí)間間隔的起點(diǎn)和終點(diǎn)

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

java 8類說(shuō)明

java.time 包含的api都是基于iso 8601的。

1.java.time.LocalDate：LocalDate是一個(gè)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(gè)不可變的類，它的實(shí)例代表一個(gè)符合人類可讀格式的時(shí)間，默認(rèn)格式是hh:mm:ss.zzz

ISO字符替代說(shuō)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(shí)間格式收錄

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