增加vendor

vendor/github.com/go-pay/gopay/pkg/util/random.go

@@ -0,0 +1,42 @@
+package util
+
+import (
+	"math/rand"
+	"time"
+)
+
+//随机生成字符串
+func RandomString(l int) string {
+	str := "0123456789AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
+	bytes := []byte(str)
+	var result []byte = make([]byte, 0, l)
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < l; i++ {
+		result = append(result, bytes[r.Intn(len(bytes))])
+	}
+	return BytesToString(result)
+}
+
+//随机生成纯字符串
+func RandomPureString(l int) string {
+	str := "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
+	bytes := []byte(str)
+	var result []byte = make([]byte, 0, l)
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < l; i++ {
+		result = append(result, bytes[r.Intn(len(bytes))])
+	}
+	return BytesToString(result)
+}
+
+//随机生成数字字符串
+func RandomNumber(l int) string {
+	str := "0123456789"
+	bytes := []byte(str)
+	var result []byte
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	for i := 0; i < l; i++ {
+		result = append(result, bytes[r.Intn(len(bytes))])
+	}
+	return BytesToString(result)
+}