commit 50ead3d72ab8b45ef82afe614954a1c2fe08c12a
Author: 李光春 <gc@dtapp.net>
Date:   Fri Mar 4 17:45:21 2022 +0800

    init

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..88685d9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+.env
+.git
+.svn
+.idea
+.vscode
+.log
diff --git a/Tomorrow.go b/Tomorrow.go
new file mode 100644
index 0000000..e91268f
--- /dev/null
+++ b/Tomorrow.go
@@ -0,0 +1,15 @@
+package gotime
+
+import "time"
+
+// Tomorrow 明天
+func Tomorrow() Pro {
+	p := NewPro()
+	location, err := time.LoadLocation("Asia/Shanghai")
+	if err != nil {
+		p.Time = time.Now().Add(time.Hour*8).AddDate(0, 0, +1)
+	} else {
+		p.Time = time.Now().In(location).AddDate(0, 0, +1)
+	}
+	return p
+}
diff --git a/app.go b/app.go
new file mode 100644
index 0000000..b10633b
--- /dev/null
+++ b/app.go
@@ -0,0 +1,91 @@
+package gotime
+
+import (
+	"fmt"
+	"time"
+)
+
+// 时间格式化常量
+const (
+	RFC3339Format       = time.RFC3339
+	Iso8601Format       = "2006-01-02T15:04:05-07:00"
+	CookieFormat        = "Monday, 02-Jan-2006 15:04:05 MST"
+	RFC1036Format       = "Mon, 02 Jan 06 15:04:05 -0700"
+	RFC7231Format       = "Mon, 02 Jan 2006 15:04:05 GMT"
+	DayDateTimeFormat   = "Mon, Jan 2, 2006 3:04 PM"
+	DateTimeFormat      = "2006-01-02 15:04:05"
+	DateFormat          = "2006-01-02"
+	TimeFormat          = "15:04:05"
+	ShortDateTimeFormat = "20060102150405"
+	ShortDateFormat     = "20060102"
+	ShortTimeFormat     = "150405"
+)
+
+// Pro 结构体
+type Pro struct {
+	Time  time.Time
+	loc   *time.Location
+	Error error
+}
+
+// NewPro 初始化结构体
+func NewPro() Pro {
+	return Pro{
+		Time: time.Now(),
+	}
+}
+
+// BeforeSeconds 获取n秒前的时间
+func (p Pro) BeforeSeconds(seconds int) Pro {
+	st, _ := time.ParseDuration(fmt.Sprintf("-%ds", seconds))
+	p.Time = p.Time.Add(st)
+	return p
+}
+
+// AfterSeconds 获取n秒后的时间
+func (p Pro) AfterSeconds(seconds int) Pro {
+	st, _ := time.ParseDuration(fmt.Sprintf("+%ds", seconds))
+	p.Time = p.Time.Add(st)
+	return p
+}
+
+// BeforeHour 获取n小时前的时间
+func (p Pro) BeforeHour(hour int) Pro {
+	st, _ := time.ParseDuration(fmt.Sprintf("-%dh", hour))
+	p.Time = p.Time.Add(st)
+	return p
+}
+
+// AfterHour 获取n小时后的时间
+func (p Pro) AfterHour(hour int) Pro {
+	st, _ := time.ParseDuration(fmt.Sprintf("+%dh", hour))
+	p.Time = p.Time.Add(st)
+	return p
+}
+
+// BeforeDay 获取n天前的时间
+func (p Pro) BeforeDay(day int) Pro {
+	p.Time = p.Time.AddDate(0, 0, -day)
+	return p
+}
+
+// AfterDay 获取n天后的时间
+func (p Pro) AfterDay(day int) Pro {
+	p.Time = p.Time.AddDate(0, 0, day)
+	return p
+}
+
+// SetFormat 格式化
+func (p Pro) SetFormat(layout string) string {
+	return p.Time.Format(layout)
+}
+
+// Month 获取当前月
+func (p Pro) Month() int {
+	return p.MonthOfYear()
+}
+
+// MonthOfYear 获取本年的第几月
+func (p Pro) MonthOfYear() int {
+	return int(p.Time.In(p.loc).Month())
+}
diff --git a/app_test.go b/app_test.go
new file mode 100644
index 0000000..5fb7ea8
--- /dev/null
+++ b/app_test.go
@@ -0,0 +1,124 @@
+package gotime
+
+import (
+	"testing"
+)
+
+func TestTime(t *testing.T) {
+	t.Log("今天此刻：", Current().Now())
+	t.Log("今天此刻格式化：", Current().Format())
+	t.Log("今天此刻日期：", Current().ToDateFormat())
+	t.Log("今天此刻时间：", Current().ToTimeFormat())
+	t.Log("今天此刻时间戳：", Current().Timestamp())
+	t.Log("今天此刻时间戳：", Current().TimestampWithSecond())
+	t.Log("今天毫秒级时间戳：", Current().TimestampWithMillisecond())
+	t.Log("今天微秒级时间戳：", Current().TimestampWithMicrosecond())
+	t.Log("今天纳秒级时间戳：", Current().TimestampWithNanosecond())
+
+	t.Log("昨天此刻：", Yesterday().Now())
+	t.Log("昨天此刻格式化：", Yesterday().Format())
+	t.Log("昨天此刻日期：", Yesterday().ToDateFormat())
+	t.Log("昨天此刻时间：", Yesterday().ToTimeFormat())
+	t.Log("昨天此刻时间戳：", Yesterday().Timestamp())
+	t.Log("昨天此刻时间戳：", Yesterday().TimestampWithSecond())
+	t.Log("昨天毫秒级时间戳：", Yesterday().TimestampWithMillisecond())
+	t.Log("昨天微秒级时间戳：", Yesterday().TimestampWithMicrosecond())
+	t.Log("昨天纳秒级时间戳：", Yesterday().TimestampWithNanosecond())
+
+	t.Log("明天此刻：", Tomorrow().Now())
+	t.Log("明天此刻格式化：", Tomorrow().Format())
+	t.Log("明天此刻日期：", Tomorrow().ToDateFormat())
+	t.Log("明天此刻时间：", Tomorrow().ToTimeFormat())
+	t.Log("明天此刻时间戳：", Tomorrow().Timestamp())
+	t.Log("明天此刻时间戳：", Tomorrow().TimestampWithSecond())
+	t.Log("明天毫秒级时间戳：", Tomorrow().TimestampWithMillisecond())
+	t.Log("明天微秒级时间戳：", Tomorrow().TimestampWithMicrosecond())
+	t.Log("明天纳秒级时间戳：", Tomorrow().TimestampWithNanosecond())
+
+	t.Log("本世纪开始时间：", Current().StartOfCentury().Format())
+	t.Log("本世纪结束时间：", Current().EndOfCentury().Format())
+	t.Log("本年代开始时间：", Current().StartOfDecade().Format())
+	t.Log("本年代结束时间：", Current().EndOfDecade().Format())
+	t.Log("本年开始时间：", Current().StartOfYear().Format())
+	t.Log("本年结束时间：", Current().EndOfYear().Format())
+	t.Log("本季度开始时间：", Current().StartOfQuarter().Format())
+	t.Log("本季度结束时间：", Current().EndOfQuarter().Format())
+	t.Log("本月开始时间：", Current().StartOfMonth().Format())
+	t.Log("本月结束时间：", Current().EndOfMonth().Format())
+
+	//t.Log("7100秒前的时间：", Current().BeforeSeconds(7100).Format())
+	//t.Log("2小时前的时间：", Current().BeforeHour(2).Format())
+	//t.Log("7100秒后的时间：", Current().AfterSeconds(7100).Format())
+	//t.Log("2小时后的时间：", Current().AfterHour(2).Format())
+}
+
+func TestStartOfDay(t *testing.T) {
+	t.Log(Current().Format())
+	t.Log(Current().StartOfDay().Format())
+	t.Log(Current().EndOfDay().Format())
+	t.Log(Current().Timestamp())
+	t.Log(Current().StartOfDay().Timestamp())
+	t.Log(Current().EndOfDay().Timestamp())
+	t.Log(Current().BeforeDay(1).Format())
+	t.Log(Current().BeforeDay(1).StartOfDay().Format())
+	t.Log(Current().BeforeDay(1).EndOfDay().Format())
+	t.Log(Current().AfterDay(1).Format())
+	t.Log(Current().AfterDay(1).StartOfDay().Format())
+	t.Log(Current().AfterDay(1).EndOfDay().Format())
+}
+
+func TestDiff(t *testing.T) {
+	t.Log(Current().DiffInHourWithAbs(SetCurrentParse("2021-11-26 14:50:00").Time))
+	t.Log(Current().DiffInHour(SetCurrentParse("2021-11-26 14:50:00").Time))
+	t.Log(Current().DiffInMinutesWithAbs(SetCurrentParse("2021-11-26 14:50:00").Time))
+	t.Log(Current().DiffInMinutes(SetCurrentParse("2021-11-26 14:50:00").Time))
+	t.Log(SetCurrentParse("2022-03-01T10:03:39+08:00").Format())
+	t.Log(SetCurrentParse("2022-03-04T11:12:47+08:00").Format())
+}
+
+func TestUnix(t *testing.T) {
+	t.Log(SetCurrentUnix(1640067240).Format())
+	t.Log(Current().BeforeDay(3 - 2).StartOfDay().Format())
+	t.Log(Current().BeforeDay(3 - 1).EndOfDay().Format())
+}
+
+func Test2(t *testing.T) {
+	t.Log(Current().BeforeDay(1 + 1).Format())
+	t.Log(Current().BeforeDay(1).Format())
+	t.Log(Current().BeforeHour(24).Format())
+	t.Log(Current().Format())
+}
+
+func TestTaoBao(t *testing.T) {
+	i := 1
+	for {
+		if i > 3 {
+			break
+		}
+		t.Log(i)
+		t.Log(i * 24)
+		t.Log((i * 24) - 24)
+		t.Log(Current().BeforeHour(i * 24).Format())
+		t.Log(Current().BeforeHour((i * 24) - 24).Format())
+		i++
+	}
+}
+
+func TestMT(t *testing.T) {
+
+	day := 1
+	t.Log(day)
+	t.Log(Current().BeforeHour(24 * day).Format())
+	t.Log(Current().BeforeHour(24 * (day - 1)).Format())
+
+	day = 2
+	t.Log(day)
+	t.Log(Current().BeforeHour(24 * day).Format())
+	t.Log(Current().BeforeHour(24 * (day - 1)).Format())
+
+	day = 3
+	t.Log(day)
+	t.Log(Current().BeforeHour(24 * day).Format())
+	t.Log(Current().BeforeHour(24 * (day - 1)).Format())
+
+}
diff --git a/differ.go b/differ.go
new file mode 100644
index 0000000..0ad3033
--- /dev/null
+++ b/differ.go
@@ -0,0 +1,69 @@
+package gotime
+
+import "time"
+
+// DiffInHour 相差多少小时
+func (p Pro) DiffInHour(t2 time.Time) (hour int64) {
+	t2.Before(p.Time)
+	diff := p.Time.Unix() - t2.Unix()
+	hour = diff / 3600
+	return hour
+}
+
+// DiffInHourWithAbs 相差多少小时(绝对值)
+func (p Pro) DiffInHourWithAbs(t2 time.Time) (hour int64) {
+	p.Time.Before(t2)
+	diff := t2.Unix() - p.Time.Unix()
+	hour = diff / 3600
+	if hour > 0 {
+		return hour
+	}
+	t2.Before(p.Time)
+	diff = p.Time.Unix() - t2.Unix()
+	hour = diff / 3600
+	return hour
+}
+
+// DiffInMinutes 相差多少分钟
+func (p Pro) DiffInMinutes(t2 time.Time) (hour int64) {
+	t2.Before(p.Time)
+	diff := p.Time.Unix() - t2.Unix()
+	hour = diff / 60
+	return hour
+}
+
+// DiffInMinutesWithAbs 相差多少分钟(绝对值)
+func (p Pro) DiffInMinutesWithAbs(t2 time.Time) (hour int64) {
+	p.Time.Before(t2)
+	diff := t2.Unix() - p.Time.Unix()
+	hour = diff / 60
+	if hour > 0 {
+		return hour
+	}
+	t2.Before(p.Time)
+	diff = p.Time.Unix() - t2.Unix()
+	hour = diff / 60
+	return hour
+}
+
+// DiffInSecond 相差多少秒
+func (p Pro) DiffInSecond(t2 time.Time) (hour int64) {
+	t2.Before(p.Time)
+	diff := p.Time.Unix() - t2.Unix()
+	hour = diff
+	return hour
+}
+
+// DiffInSecondWithAbs 相差多少秒(绝对值)
+func (p Pro) DiffInSecondWithAbs(t2 time.Time) (hour int64) {
+	p.Time.Before(t2)
+	diff := t2.Unix() - p.Time.Unix()
+	hour = diff
+	if hour > 0 {
+		return hour
+	}
+	t2.Before(p.Time)
+	diff = p.Time.Unix() - t2.Unix()
+	hour = diff
+	return hour
+}
diff --git a/errors.go b/errors.go
new file mode 100644
index 0000000..2f69622
--- /dev/null
+++ b/errors.go
@@ -0,0 +1,8 @@
+package gotime
+
+import "fmt"
+
+// invalidTimezoneError  无效的时区错误
+var invalidTimezoneError = func(timezone string) error {
+	return fmt.Errorf("invalid timezone %q, please see the file %q for all valid timezones", timezone, "$GOROOT/lib/time/zoneinfo.zip")
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..db4530b
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module gitee.com/dtapps/go-time
+
+go 1.17
diff --git a/location.go b/location.go
new file mode 100644
index 0000000..1b664ab
--- /dev/null
+++ b/location.go
@@ -0,0 +1,14 @@
+package gotime
+
+import (
+	"time"
+)
+
+// 通过时区获取 Location 实例
+func getLocationByTimezone(timezone string) (*time.Location, error) {
+	loc, err := time.LoadLocation(timezone)
+	if err != nil {
+		err = invalidTimezoneError(timezone)
+	}
+	return loc, err
+}
diff --git a/start_end.go b/start_end.go
new file mode 100644
index 0000000..5afb4f5
--- /dev/null
+++ b/start_end.go
@@ -0,0 +1,124 @@
+package gotime
+
+import "time"
+
+// 数字常量
+const (
+	YearsPerMillennium         = 1000    // 每千年1000年
+	YearsPerCentury            = 100     // 每世纪100年
+	YearsPerDecade             = 10      // 每十年10年
+	QuartersPerYear            = 4       // 每年4季度
+	MonthsPerYear              = 12      // 每年12月
+	MonthsPerQuarter           = 3       // 每季度3月
+	WeeksPerNormalYear         = 52      // 每常规年52周
+	weeksPerLongYear           = 53      // 每长年53周
+	WeeksPerMonth              = 4       // 每月4周
+	DaysPerLeapYear            = 366     // 每闰年366天
+	DaysPerNormalYear          = 365     // 每常规年365天
+	DaysPerWeek                = 7       // 每周7天
+	HoursPerWeek               = 168     // 每周168小时
+	HoursPerDay                = 24      // 每天24小时
+	MinutesPerDay              = 1440    // 每天1440分钟
+	MinutesPerHour             = 60      // 每小时60分钟
+	SecondsPerWeek             = 604800  // 每周604800秒
+	SecondsPerDay              = 86400   // 每天86400秒
+	SecondsPerHour             = 3600    // 每小时3600秒
+	SecondsPerMinute           = 60      // 每分钟60秒
+	MillisecondsPerSecond      = 1000    // 每秒1000毫秒
+	MicrosecondsPerMillisecond = 1000    // 每毫秒1000微秒
+	MicrosecondsPerSecond      = 1000000 // 每秒1000000微秒
+)
+
+// StartOfCentury 本世纪开始时间
+func (p Pro) StartOfCentury() Pro {
+	p.Time = time.Date(p.Time.Year()/YearsPerCentury*YearsPerCentury, 1, 1, 0, 0, 0, 0, p.Time.Location())
+	return p
+}
+
+// EndOfCentury 本世纪结束时间
+func (p Pro) EndOfCentury() Pro {
+	p.Time = time.Date(p.Time.Year()/YearsPerCentury*YearsPerCentury+99, 12, 31, 23, 59, 59, 999999999, p.Time.Location())
+	return p
+}
+
+// StartOfDecade 本年代开始时间
+func (p Pro) StartOfDecade() Pro {
+	p.Time = time.Date(p.Time.Year()/YearsPerDecade*YearsPerDecade, 1, 1, 0, 0, 0, 0, p.Time.Location())
+	return p
+}
+
+// EndOfDecade 本年代结束时间
+func (p Pro) EndOfDecade() Pro {
+	p.Time = time.Date(p.Time.Year()/YearsPerDecade*YearsPerDecade+9, 12, 31, 23, 59, 59, 999999999, p.Time.Location())
+	return p
+}
+
+// StartOfYear 本年开始时间
+func (p Pro) StartOfYear() Pro {
+	p.Time = time.Date(p.Time.Year(), 1, 1, 0, 0, 0, 0, p.Time.Location())
+	return p
+}
+
+// EndOfYear 本年结束时间
+func (p Pro) EndOfYear() Pro {
+	p.Time = time.Date(p.Time.Year(), 12, 31, 23, 59, 59, 999999999, p.Time.Location())
+	return p
+}
+
+// Quarter 获取当前季度
+func (p Pro) Quarter() (quarter int) {
+	switch {
+	case p.Time.Month() >= 10:
+		quarter = 4
+	case p.Time.Month() >= 7:
+		quarter = 3
+	case p.Time.Month() >= 4:
+		quarter = 2
+	case p.Time.Month() >= 1:
+		quarter = 1
+	}
+	return
+}
+
+// StartOfQuarter 本季度开始时间
+func (p Pro) StartOfQuarter() Pro {
+	p.Time = time.Date(p.Time.Year(), time.Month(3*p.Quarter()-2), 1, 0, 0, 0, 0, p.Time.Location())
+	return p
+}
+
+// EndOfQuarter 本季度结束时间
+func (p Pro) EndOfQuarter() Pro {
+	quarter, day := p.Quarter(), 30
+	switch quarter {
+	case 1, 4:
+		day = 31
+	case 2, 3:
+		day = 30
+	}
+	p.Time = time.Date(p.Time.Year(), time.Month(3*quarter), day, 23, 59, 59, 999999999, p.Time.Location())
+	return p
+}
+
+// StartOfMonth 本月开始时间
+func (p Pro) StartOfMonth() Pro {
+	p.Time = time.Date(p.Time.Year(), time.Month(p.Month()), 1, 0, 0, 0, 0, p.Time.Location())
+	return p
+}
+
+// EndOfMonth 本月结束时间
+func (p Pro) EndOfMonth() Pro {
+	p.Time = time.Date(p.Time.Year(), time.Month(p.Month()), 1, 23, 59, 59, 999999999, p.Time.Location())
+	return p
+}
+
+// StartOfDay 本日开始时间
+func (p Pro) StartOfDay() Pro {
+	p.Time = time.Date(p.Time.Year(), p.Time.Month(), p.Time.Day(), 0, 0, 0, 0, p.Time.Location())
+	return p
+}
+
+// EndOfDay 本日结束时间
+func (p Pro) EndOfDay() Pro {
+	p.Time = time.Date(p.Time.Year(), p.Time.Month(), p.Time.Day(), 23, 59, 59, 0, p.Time.Location())
+	return p
+}
diff --git a/today.go b/today.go
new file mode 100644
index 0000000..f19f505
--- /dev/null
+++ b/today.go
@@ -0,0 +1,112 @@
+package gotime
+
+import (
+	"log"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Current 获取当前的时间
+func Current() Pro {
+	p := NewPro()
+	p.loc, p.Error = time.LoadLocation("Asia/Shanghai")
+	if p.Error != nil {
+		// Docker部署golang应用时时区问题 https://www.ddhigh.com/2018/03/01/golang-docker-timezone.html
+		log.Printf("【gotime】时区错误：%v\n", p.Error)
+		p.Time = time.Now().Add(time.Hour * 8)
+	} else {
+		p.Time = time.Now().In(p.loc)
+	}
+	return p
+}
+
+// SetCurrent 设置当前的时间
+func SetCurrent(sTime time.Time) Pro {
+	p := NewPro()
+	p.Time = sTime
+	return p
+}
+
+// SetCurrentParse 设置当前的时间
+func SetCurrentParse(str string) Pro {
+
+	p := NewPro()
+
+	p.loc, p.Error = time.LoadLocation("Asia/Shanghai")
+
+	layout := DateTimeFormat
+	if str == "" || str == "0" || str == "0000-00-00 00:00:00" || str == "0000-00-00" || str == "00:00:00" {
+		return p
+	}
+	if len(str) == 10 && strings.Count(str, "-") == 2 {
+		layout = DateFormat
+	}
+	if strings.Index(str, "T") == 10 {
+		layout = RFC3339Format
+	}
+	if _, err := strconv.ParseInt(str, 10, 64); err == nil {
+		switch len(str) {
+		case 8:
+			layout = ShortDateFormat
+		case 14:
+			layout = ShortDateTimeFormat
+		}
+	}
+	location, _ := time.ParseInLocation(layout, str, p.loc)
+
+	p.Time = location
+	return p
+}
+
+// SetCurrentUnix 设置当前的时间 Unix时间戳
+func SetCurrentUnix(ts int64) Pro {
+	p := NewPro()
+	p.Time = time.Unix(ts, 0)
+	return p
+}
+
+// Now 今天此刻
+func (p Pro) Now() time.Time {
+	return p.Time
+}
+
+// Format 今天此刻格式化
+func (p Pro) Format() string {
+	return p.Time.Format(DateTimeFormat)
+}
+
+// ToDateFormat 今天此刻日期
+func (p Pro) ToDateFormat() string {
+	return p.Time.Format(DateFormat)
+}
+
+// ToTimeFormat 今天此刻时间
+func (p Pro) ToTimeFormat() string {
+	return p.Time.Format(TimeFormat)
+}
+
+// Timestamp 今天此刻时间戳
+func (p Pro) Timestamp() int64 {
+	return p.Time.Unix()
+}
+
+// TimestampWithSecond 今天此刻时间戳
+func (p Pro) TimestampWithSecond() int64 {
+	return p.Time.Unix()
+}
+
+// TimestampWithMillisecond 今天毫秒级时间戳
+func (p Pro) TimestampWithMillisecond() int64 {
+	return p.Time.UnixNano() / int64(time.Millisecond)
+}
+
+// TimestampWithMicrosecond 今天微秒级时间戳
+func (p Pro) TimestampWithMicrosecond() int64 {
+	return p.Time.UnixNano() / int64(time.Microsecond)
+}
+
+// TimestampWithNanosecond 今天纳秒级时间戳
+func (p Pro) TimestampWithNanosecond() int64 {
+	return p.Time.UnixNano()
+}
diff --git a/yesterday.go b/yesterday.go
new file mode 100644
index 0000000..be1cd6c
--- /dev/null
+++ b/yesterday.go
@@ -0,0 +1,17 @@
+package gotime
+
+import (
+	"time"
+)
+
+// Yesterday 昨天
+func Yesterday() Pro {
+	p := NewPro()
+	location, err := time.LoadLocation("Asia/Shanghai")
+	if err != nil {
+		p.Time = time.Now().Add(time.Hour*8).AddDate(0, 0, -1)
+	} else {
+		p.Time = time.Now().In(location).AddDate(0, 0, -1)
+	}
+	return p
+}