Merge pull request #1692 from xldistance/patch-15

json写入支持中文字符

vnpy/trader/utility.py

@@ -84,7 +84,7 @@ def load_json(filename: str):
     filepath = get_file_path(filename)
 
     if filepath.exists():
-        with open(filepath, mode='r') as f:
+        with open(filepath, mode='r',encoding = 'UTF-8') as f:
             data = json.load(f)
         return data
     else:
@@ -97,8 +97,8 @@ def save_json(filename: str, data: dict):
     Save data into json file in temp path.
     """
     filepath = get_file_path(filename)
-    with open(filepath, mode='w+') as f:
-        json.dump(data, f, indent=4)
+    with open(filepath, mode='w+',encoding = 'UTF-8') as f:
+        json.dump(data, f,sort_keys=True,indent =4,ensure_ascii=False)
 
 
 def round_to(value: float, target: float):