1. 获取当前时间字符串（北京时间）

import "time"

// "2023-05-29 15:10:41"
func GetNowStr() string {
    loc, _ := time.LoadLocation("Asia/Shanghai")
    return time.Now().In(loc).Format("2006-01-02 15:04:05")
}

2. 时间戳转时间字符串（北京时间）

import "time"

func TransTimestampToStr(Timestamp int64) string {
    timeLayout := "2006-01-02 15:04:05"
    loc, _ := time.LoadLocation("Asia/Shanghai")
    timeStr := time.Unix(Timestamp, 0).In(loc).Format(timeLayout)
    return timeStr
}

3. 时间字符串转时间戳（北京时间）

import "time"

func TransTimeStrToStamp(timeStr string) (formatTime time.Time, err error) {
    if len(timeStr) == 10 {
        timeStr += " 00:00:00"
        loc, _ := time.LoadLocation("Asia/Shanghai")
        formatTime, err := time.ParseInLocation("2006-01-02 15:04:05", timeStr, loc)
        return formatTime, err
    } else if len(timeStr) == 19 {
        loc, _ := time.LoadLocation("Asia/Shanghai")
        formatTime, err := time.ParseInLocation("2006-01-02 15:04:05", timeStr, loc)
        return formatTime, err
    }
    return formatTime, errors.New("timeStr format error")
}

rTime, err := TransTimeStrToStamp(timeStr)
if err != nil {
    return ""
}
rTimestamp := rTime.Unix()

4. 过去时间（timeStr）距离现在差几天

// 计算相差天数
func CalcTime(timeStr string) string {
    nowTimestamp := time.Now().Unix()
    recordTime, err := TransTimeStrToStamp(timeStr)
    if err != nil {
        return ""
    }
    recordTimestamp := recordTime.Unix()
    timeDiff := int(math.Ceil(float64(nowTimestamp-recordTimestamp) / 86400))
    if timeDiff > 0 {
        return fmt.Sprintf("已超时%d天", timeDiff)
    }
    return ""
}