diff --git a/common/global_call.py b/common/global_call.py
index 3433ef7ec7a112260d2ff6e5634f789b416f5aa3..4289d94cc75802fa0ee6fd3ac081dbd481c4f59a 100644
--- a/common/global_call.py
+++ b/common/global_call.py
@@ -22,6 +22,23 @@ class GlobalCall:
     output_hotspot_file = "hotspotInfo.txt"
     output_custom_file = "custom.txt"
 
+    @staticmethod
+    def get_str_v(k , default ):
+        cfg = Config.get_json_dict()
+        arr = k.strip().split('.')
+
+        while 1 < len(arr):
+            if  arr[0] not in cfg:
+                return False, default
+
+            cfg = cfg[arr[0]]
+            arr.remove(arr[0])
+
+        if arr[0] in cfg:
+            return True, str(cfg[arr[0]])
+        else:
+            return False, default
+
     @staticmethod
     def get_json_value(k , default, cfg = Config.get_json_dict()):
         '''