handle_json.py:

import os
import sys
basePath = os.getcwd()
sys.path.append(basePath)
import json

class JsonsOperator:
     def readJsons(self,filePath=None):
         '''
         读取filePath路径下json文件的所有信息
         '''
         location = None
         if filePath == None:
             location = basePath + "/chapter7/mock/csdn_mock.json"
         else:
             location = basePath + filePath
        
         print("readJsons方法将要打开读的location是-------------》",location)
         with open(location, "rb") as f:
             ###########json.load()用于从json文件中读取数据,返回dict类型
             res = json.load(f)
             # print("读取文件获得的res类型和值是：",type(res),"|",res)
             return res

     
     def getValue(self,key,filePath=None):
         '''
         读取指定配置json文件里，key对应的value
         '''
         dict = self.readJsons(filePath)
         value = dict.get(key)
         return value

    
     def writeValue(self,data,path=None):
         '''
         向json文件写入数据(全部覆盖写入),比如写入cookie
         '''
         if path == None:
             path = "/chapter7/config/cookie.json"
         data = json.dumps(data,ensure_ascii=False)
         print("(((((((((((((",data)
         with open(basePath+path, "w",encoding="UTF-8") as f:
             f.write(data)

     def updateValue(self,key,data,path=None):
         '''增加或者更新json文件key-value'''
         '''要求传入的key是字符串类型，data是dict类型'''
         print("updateValue方法传入的path是-------------》",path)
         if path == None:
             path = "/chapter7/mock/csdn_mock.json"
         
         initialMocks = jsonsOperator.readJsons(path)
        #  #data需要转换为dict类型
        #  data = json.loads(data)
         initialMocks[key] = data
         jsonsOperator.writeValue(initialMocks,path)

jsonsOperator = JsonsOperator()

if(__name__ == "__main__"):
    data = {
        "lll":"hhhh"
    }
    jsonsOperator.writeValue(data)

server.py:

import os
import sys
import json
#解决无法导入包的问题
basePath = os.getcwd()
sys.path.append(basePath)
from flask import Flask
from flask import request
import json
from chapter7.util.handle_json import jsonsOperator
app = Flask(__name__)

@app.route('/mock',methods=['POST'])
def mock():
    request_method = request.method
    if request_method == 'POST':
        '''初始化返回数据'''
        returnData = {
            "message":None
        }
        
        json_data = {}
        try:
            json_data = json.loads(request.get_data())
        except Exception:
            print("传入data参数不是json格式")
            returnData["message"] = "传入data参数不是json格式"
            return returnData
        url = json_data.get("url")
        data = json_data.get("data")
        try:
            jsonsOperator.updateValue(url,data,"/chapter7/mock/csdn_mock.json")
        except Exception:
            returnData["message"] = "写入数据失败"
            return returnData
        returnData["message"] = "写入数据成功"
        return returnData
            # return data
    else:
        data = json.dumps({
            'code' : 1,
            'meaasge' : '请求类型应为POST'
        },ensure_ascii=False)
        return data
    
if(__name__ == '__main__'):
    app.run()

我测试了运行结果正常