mirror of
https://gitee.com/johng/gf.git
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318 lines
8.5 KiB
Go
318 lines
8.5 KiB
Go
// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package gtime provides functionality for measuring and displaying time.
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package gtime
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import (
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"errors"
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"github.com/gogf/gf/g/text/gregex"
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"regexp"
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"strconv"
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"strings"
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"time"
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)
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const (
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// 时间间隔缩写
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D = 24 * time.Hour
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H = time.Hour
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M = time.Minute
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S = time.Second
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MS = time.Millisecond
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US = time.Microsecond
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NS = time.Nanosecond
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// 常用时间格式正则匹配，支持的标准时间格式：
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// "2017-12-14 04:51:34 +0805 LMT",
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// "2017-12-14 04:51:34 +0805 LMT",
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// "2006-01-02T15:04:05Z07:00",
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// "2014-01-17T01:19:15+08:00",
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// "2018-02-09T20:46:17.897Z",
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// "2018-02-09 20:46:17.897",
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// "2018-02-09T20:46:17Z",
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// "2018-02-09 20:46:17",
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// "2018/10/31 - 16:38:46"
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// "2018-02-09",
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// "2018.02.09",
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// 日期连接符号支持'-'、'/'、'.'
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TIME_REAGEX_PATTERN1 = `(\d{4}[-/\.]\d{2}[-/\.]\d{2})[:\sT-]*(\d{0,2}:{0,1}\d{0,2}:{0,1}\d{0,2}){0,1}\.{0,1}(\d{0,9})([\sZ]{0,1})([\+-]{0,1})([:\d]*)`
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// 01-Nov-2018 11:50:28
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// 01/Nov/2018 11:50:28
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// 01.Nov.2018 11:50:28
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// 01.Nov.2018:11:50:28
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// 日期连接符号支持'-'、'/'、'.'
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TIME_REAGEX_PATTERN2 = `(\d{1,2}[-/\.][A-Za-z]{3,}[-/\.]\d{4})[:\sT-]*(\d{0,2}:{0,1}\d{0,2}:{0,1}\d{0,2}){0,1}\.{0,1}(\d{0,9})([\sZ]{0,1})([\+-]{0,1})([:\d]*)`
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)
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var (
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// 使用正则判断会比直接使用ParseInLocation挨个轮训判断要快很多
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timeRegex1, _ = regexp.Compile(TIME_REAGEX_PATTERN1)
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timeRegex2, _ = regexp.Compile(TIME_REAGEX_PATTERN2)
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// 月份英文与阿拉伯数字对应关系
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monthMap = map[string]int{
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"jan": 1,
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"feb": 2,
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"mar": 3,
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"apr": 4,
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"may": 5,
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"jun": 6,
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"jul": 7,
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"aug": 8,
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"sep": 9,
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"sept": 9,
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"oct": 10,
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"nov": 11,
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"dec": 12,
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"january": 1,
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"february": 2,
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"march": 3,
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"april": 4,
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"june": 6,
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"july": 7,
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"august": 8,
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"september": 9,
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"october": 10,
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"november": 11,
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"december": 12,
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}
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)
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// 设置当前进程全局的默认时区，如: Asia/Shanghai
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func SetTimeZone(zone string) error {
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location, err := time.LoadLocation(zone)
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if err == nil {
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time.Local = location
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}
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return err
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}
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// 获取当前的纳秒数
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func Nanosecond() int64 {
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return time.Now().UnixNano()
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}
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// 获取当前的微秒数
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func Microsecond() int64 {
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return time.Now().UnixNano() / 1e3
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}
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// 获取当前的毫秒数
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func Millisecond() int64 {
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return time.Now().UnixNano() / 1e6
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}
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// 获取当前的秒数(时间戳)
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func Second() int64 {
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return time.Now().Unix()
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}
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// 获得当前的日期(例如：2006-01-02)
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func Date() string {
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return time.Now().Format("2006-01-02")
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}
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// 获得当前的时间(例如：2006-01-02 15:04:05)
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func Datetime() string {
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return time.Now().Format("2006-01-02 15:04:05")
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}
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// 解析日期字符串(日期支持'-'或'/'或'.'连接符号)
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func parseDateStr(s string) (year, month, day int) {
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array := strings.Split(s, "-")
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if len(array) < 3 {
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array = strings.Split(s, "/")
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}
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if len(array) < 3 {
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array = strings.Split(s, ".")
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}
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// 解析失败
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if len(array) < 3 {
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return
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}
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// 判断年份在开头还是末尾
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if isNumeric(array[1]) {
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year, _ = strconv.Atoi(array[0])
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month, _ = strconv.Atoi(array[1])
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day, _ = strconv.Atoi(array[2])
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} else {
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if v, ok := monthMap[strings.ToLower(array[1])]; ok {
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month = v
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} else {
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return
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}
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year, _ = strconv.Atoi(array[2])
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day, _ = strconv.Atoi(array[0])
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}
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return
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}
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// 字符串转换为时间对象，format参数指定格式的format(如: Y-m-d H:i:s)，当指定format参数时效果同StrToTimeFormat方法。
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// 注意：自动解析日期时间时，必须有日期才能解析成功，如果字符串中不带有日期字段，那么解析失败。
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func StrToTime(str string, format ...string) (*Time, error) {
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if len(format) > 0 {
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return StrToTimeFormat(str, format[0])
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}
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var year, month, day int
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var hour, min, sec, nsec int
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var match []string
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var local = time.Local
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if match = timeRegex1.FindStringSubmatch(str); len(match) > 0 && match[1] != "" {
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for k, v := range match {
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match[k] = strings.TrimSpace(v)
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}
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year, month, day = parseDateStr(match[1])
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} else if match = timeRegex2.FindStringSubmatch(str); len(match) > 0 && match[1] != "" {
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for k, v := range match {
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match[k] = strings.TrimSpace(v)
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}
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year, month, day = parseDateStr(match[1])
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} else {
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return nil, errors.New("unsupported time format")
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}
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// 时间
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if len(match[2]) > 0 {
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s := strings.Replace(match[2], ":", "", -1)
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if len(s) < 6 {
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s += strings.Repeat("0", 6-len(s))
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}
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hour, _ = strconv.Atoi(s[0:2])
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min, _ = strconv.Atoi(s[2:4])
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sec, _ = strconv.Atoi(s[4:6])
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}
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// 纳秒，检查并执行位补齐
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if len(match[3]) > 0 {
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nsec, _ = strconv.Atoi(match[3])
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for i := 0; i < 9-len(match[3]); i++ {
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nsec *= 10
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}
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}
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// 如果字符串中有时区信息(具体时间信息)，那么执行时区转换，将时区转成UTC
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if match[4] != "" && match[6] == "" {
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match[6] = "000000"
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}
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// 如果offset有值优先处理offset，否则处理后面的时区名称
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if match[6] != "" {
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zone := strings.Replace(match[6], ":", "", -1)
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zone = strings.TrimLeft(zone, "+-")
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if len(zone) <= 6 {
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zone += strings.Repeat("0", 6-len(zone))
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h, _ := strconv.Atoi(zone[0:2])
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m, _ := strconv.Atoi(zone[2:4])
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s, _ := strconv.Atoi(zone[4:6])
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// 判断字符串输入的时区是否和当前程序时区相等(使用offset判断)，不相等则将对象统一转换为UTC时区
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// 当前程序时区Offset(秒)
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_, localOffset := time.Now().Zone()
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if (h*3600 + m*60 + s) != localOffset {
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local = time.UTC
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// UTC时差转换
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operation := match[5]
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if operation != "+" && operation != "-" {
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operation = "-"
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}
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switch operation {
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case "+":
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if h > 0 {
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hour -= h
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}
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if m > 0 {
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min -= m
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}
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if s > 0 {
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sec -= s
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}
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case "-":
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if h > 0 {
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hour += h
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}
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if m > 0 {
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min += m
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}
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if s > 0 {
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sec += s
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}
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}
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}
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}
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}
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// 统一生成UTC时间对象
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return NewFromTime(time.Date(year, time.Month(month), day, hour, min, sec, nsec, local)), nil
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}
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// 时区转换
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func ConvertZone(strTime string, toZone string, fromZone ...string) (*Time, error) {
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t, err := StrToTime(strTime)
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if err != nil {
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return nil, err
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}
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if len(fromZone) > 0 {
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if l, err := time.LoadLocation(fromZone[0]); err != nil {
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return nil, err
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} else {
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t.Time = time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Time.Second(), t.Time.Nanosecond(), l)
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}
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}
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if l, err := time.LoadLocation(toZone); err != nil {
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return nil, err
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} else {
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return t.ToLocation(l), nil
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}
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}
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// 字符串转换为时间对象，指定字符串时间格式，format格式形如：Y-m-d H:i:s
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func StrToTimeFormat(str string, format string) (*Time, error) {
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return StrToTimeLayout(str, formatToStdLayout(format))
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}
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// 字符串转换为时间对象，通过标准库layout格式进行解析，layout格式形如：2006-01-02 15:04:05
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func StrToTimeLayout(str string, layout string) (*Time, error) {
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if t, err := time.ParseInLocation(layout, str, time.Local); err == nil {
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return NewFromTime(t), nil
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} else {
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return nil, err
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}
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}
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// 从字符串内容中(也可以是文件名称等等)解析时间，并返回解析成功的时间对象，否则返回nil。
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// 注意当内容中存在多个时间时，会解析第一个。
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// format参数可以指定需要解析的时间格式。
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func ParseTimeFromContent(content string, format ...string) *Time {
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if len(format) > 0 {
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if match, err := gregex.MatchString(formatToRegexPattern(format[0]), content); err == nil && len(match) > 0 {
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return NewFromStrFormat(match[0], format[0])
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}
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} else {
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if match := timeRegex1.FindStringSubmatch(content); len(match) >= 1 {
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return NewFromStr(strings.Trim(match[0], "./_- \n\r"))
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} else if match := timeRegex2.FindStringSubmatch(content); len(match) >= 1 {
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return NewFromStr(strings.Trim(match[0], "./_- \n\r"))
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}
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}
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return nil
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}
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// 计算函数f执行的时间，单位纳秒
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func FuncCost(f func()) int64 {
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t := Nanosecond()
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f()
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return Nanosecond() - t
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}
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// 判断所给字符串是否为数字
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func isNumeric(s string) bool {
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length := len(s)
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if length == 0 {
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return false
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}
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for i := 0; i < len(s); i++ {
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if s[i] < byte('0') || s[i] > byte('9') {
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return false
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}
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}
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return true
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}
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