commit

cmd/xb/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"time"
+)
+
+func TzStrToOffset(ianaZone string) (string, error) {
+	loc, err := time.LoadLocation(ianaZone)
+	if err != nil {
+		return "", fmt.Errorf("无法加载时区 %s: %v", ianaZone, err)
+	}
+
+	t := time.Date(2025, time.October, 28, 0, 0, 0, 0, loc)
+
+	_, offsetSeconds := t.Zone()
+
+	offset := time.Duration(offsetSeconds) * time.Second
+
+	// 格式化偏移量。time.Time.Format() 无法直接将 Location 格式化成 UTC+HH:MM，
+	// 因此我们需要手动计算并格式化。
+	sign := "+"
+	if offsetSeconds < 0 {
+		sign = "-"
+		offset = -offset // 确保偏移量为正值进行计算
+	}
+
+	hours := int(offset.Hours())
+	minutes := int(offset.Minutes()) % 60
+
+	// 最终的格式化字符串
+	utcOffsetString := fmt.Sprintf("%s%02d%02d", sign, hours, minutes)
+
+	return utcOffsetString, nil
+}
+
+func main() {
+	ianaZone := "Asia/Shanghai"
+	ianaZone = "UTC"
+
+	utcOffsetString, err := TzStrToOffset(ianaZone)
+	if err != nil {
+		log.Fatalf("错误: %v", err)
+	}
+
+	fmt.Printf("IANA 时区: %s\n", ianaZone)
+	fmt.Printf("UTC 偏移量: %s\n", utcOffsetString)
+}