修改网关代码的结构，调整了逻辑，删除了许多无用的代码

gateway/utils/date_time.go

@@ -38,3 +38,7 @@ func GetDateBeforeDays(days int) string {
 func GetDateTimeBeforeDays(days int) string {
 	return time.Now().Add(-time.Hour * time.Duration(days) * 24).Format("2006-01-02 15:04:05")
 }
+
+func GetDateAfterDays(days int) string {
+	return time.Now().Add(time.Hour * time.Duration(days) * 24).Format("2006-01-02")
+}

gateway/utils/md5.go

@@ -30,3 +30,18 @@ func GetMD5LOWER(s string) string {
 func GetMD5Upper(s string) string {
 	return strings.ToUpper(GetMD5LOWER(s))
 }
+
+/**
+** 将map数据变成key=value形式的字符串
+ */
+func MapToString(m map[string]string) string {
+
+	res := ""
+	for k, v := range m {
+		res = res + k + "=" + v + "&"
+	}
+
+	suffix := strings.TrimSuffix(res, "&")
+
+	return suffix
+}

gateway/utils/sort_go.go

@@ -24,3 +24,16 @@ func SortMap(m map[string]string) []string {
 	sort.Strings(arr)
 	return arr
 }
+
+/**
+** 按照key的ascii值从小到大给map排序
+ */
+func SortMapByKeys(m map[string]string) map[string]string {
+	keys := SortMap(m)
+	tmp := make(map[string]string)
+	for _, key := range keys {
+		tmp[key] = m[key]
+	}
+
+	return tmp
+}