code style simplify

config/json.go

@@ -145,7 +145,10 @@ func (c *JsonConfigContainer) getdata(key string) interface{} {
 	}
 	sectionKey := strings.Split(key, "::")
 	if len(sectionKey) >= 2 {
-		if curValue, ok := c.data[sectionKey[0]]; ok {
+		curValue, ok := c.data[sectionKey[0]]
+		if !ok {
+			return nil
+		}
 		for _, key := range sectionKey[1:] {
 			if v, ok := curValue.(map[string]interface{}); ok {
 				if v2, ok := v[key]; ok {
@@ -153,7 +156,6 @@ func (c *JsonConfigContainer) getdata(key string) interface{} {
 				}
 			}
 		}
-		}
 		return nil
 	}
 	if v, ok := c.data[key]; ok {