75 lines
2.5 KiB
Go
75 lines
2.5 KiB
Go
package main
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import (
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"fmt"
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"log"
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"time"
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"git.toowon.com/jimmy/go-common/datetime"
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)
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func main() {
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// 示例1：将当前时间转换为UTC
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fmt.Println("=== Example 1: Convert Current Time to UTC ===")
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now := time.Now()
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utcTime := datetime.ToUTC(now)
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fmt.Printf("Local time: %s\n", datetime.FormatDateTime(now))
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fmt.Printf("UTC time: %s\n", datetime.FormatDateTime(utcTime))
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// 示例2：从指定时区转换为UTC
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fmt.Println("\n=== Example 2: Convert from Specific Timezone to UTC ===")
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// 解析上海时区的时间
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shanghaiTime, err := datetime.ParseDateTime("2024-01-01 12:00:00", datetime.AsiaShanghai)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Shanghai time: %s\n", datetime.FormatDateTime(shanghaiTime, datetime.AsiaShanghai))
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// 转换为UTC
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utcTime2, err := datetime.ToUTCFromTimezone(shanghaiTime, datetime.AsiaShanghai)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("UTC time: %s\n", datetime.FormatDateTime(utcTime2, datetime.UTC))
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// 示例3：解析时间字符串并直接转换为UTC
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fmt.Println("\n=== Example 3: Parse and Convert to UTC ===")
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utcTime3, err := datetime.ParseDateTimeToUTC("2024-01-01 12:00:00", datetime.AsiaShanghai)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Parsed from Shanghai timezone, UTC: %s\n", datetime.FormatDateTime(utcTime3, datetime.UTC))
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// 示例4：解析日期并转换为UTC
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fmt.Println("\n=== Example 4: Parse Date and Convert to UTC ===")
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utcTime4, err := datetime.ParseDateToUTC("2024-01-01", datetime.AsiaShanghai)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Date parsed from Shanghai timezone, UTC: %s\n", datetime.FormatDateTime(utcTime4, datetime.UTC))
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// 示例5：数据库存储场景
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fmt.Println("\n=== Example 5: Database Storage Scenario ===")
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// 从请求中获取时间（假设是上海时区）
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requestTimeStr := "2024-01-01 12:00:00"
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requestTimezone := datetime.AsiaShanghai
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// 转换为UTC时间（用于数据库存储）
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dbTime, err := datetime.ParseDateTimeToUTC(requestTimeStr, requestTimezone)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Request time (Shanghai): %s\n", requestTimeStr)
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fmt.Printf("Database time (UTC): %s\n", datetime.FormatDateTime(dbTime, datetime.UTC))
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// 从数据库读取UTC时间，转换为用户时区显示
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userTimezone := datetime.AsiaShanghai
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displayTime, err := datetime.ToTimezone(dbTime, userTimezone)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("Display time (Shanghai): %s\n", datetime.FormatDateTime(displayTime, userTimezone))
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}
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