feat(*): go 后端项目脚手架

pkg/common/rand.go

@@ -0,0 +1,18 @@
+package common
+
+import (
+	"math/rand"
+	"time"
+)
+
+// Rand 生成指定长度的随机字符串，字符集为 [0-9a-zA-Z]
+func Rand(length int) string {
+	const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+
+	seededRand := rand.New(rand.NewSource(time.Now().UnixNano()))
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = charset[seededRand.Intn(len(charset))]
+	}
+	return string(b)
+}