把JSON数据格式转换为Python的类对象方法详解（两种方法）

{"Name": "Tom", "Sex": "Male", "BloodType": "A", "Hobbies": ["篮球", "足球"]}

import com.alibaba.fastjson.JSONObject;
import com.example.demo.entity.Product;
String a = "{\"gmtCreate\":1559009853000,\"dataFormat\":1,\"deviceCount\":1,\"nodeType\":0,\"productKey\":\"a1U85pSQrAz\",\"productName\":\"温度计\"}";
//JSON字符串反序列化为一个Product对象
Product product = JSONObject.parseObject(a, Product.class);

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import json
class Person:
 def __init__(self, data=None):
  self._name = "1"
  self._sex = ""
  self._blood_type = "O"
  self._hobbies = []
  self._date_of_birth = "1900/1/1"
  if data:
   self.__dict__ = data
 # 通过属性的方式来获取和设置实例变量的值，如果不这样那么就只能通过set或者get方法来做
 @property
 def date_of_brith(self):
  return self._date_of_birth
 @date_of_brith.setter
 def date_of_brith(self, date_of_brith):
  self._date_of_birth = date_of_brith
def main():
 try:
  str1 = '{"name": "Tom", "sex": "male", "blood_type": "A", "hobbies": ["篮球", "足球"]}'
  person1 = json.loads(str1, object_hook=Person)
  print(isinstance(person1, Person))
  # 这里你会发现没有date_of_brith这个内容
  print(person1.__dict__)
  # 获取date_of_brith属性值报错，因为JSON字符串不包含这个键，但是类中的实例变量有这个，正常来讲你应该可以获取默认值，但是由于
  # 替换了__dict__，所以就没有了，因为__dict__原本就是实例变量的字典形式，你替换了自然也就找不到原来的了。
  # print(person.date_of_brith)
  # 下面我们通过正常的方式实例化一个对象
  person2 = Person()
  print(person2.__dict__)
  print(person2.date_of_brith)
 except Exception as err:
  print(err)
if __name__ == "__main__":
 try:
  main()
 finally:
  sys.exit()

#!/usr/bin/env python
# -*- coding: utf-8 -*-
class Person:
 def __init__(self):
  self._name = "1"
  self._sex = ""
  self._blood_type = "O"
  self._hobbies = []
  self._date_of_birth = "1900/1/1"
 def __str__(self):
  """
  输出实例的类名字，而不是一个地址
  :return: 该实例的类名字
  """
  return self.__class__.__name__
 # 当一个方法加上这个装饰器之后，hasattr()中的属性要写成这个方法的名称，而不是实例变量的名称。
 # 如果不加这个装饰器，那么hasattr()中的属性名称要和实例变量的名称保持一致
 @property
 def Name(self):
  return self._name
 @Name.setter
 def Name(self, name):
  self._name = name
 @property
 def Sex(self):
  return self._sex
 @Sex.setter
 def Sex(self, sex):
  self._sex = sex
 @property
 def BloodType(self):
  return self._blood_type
 @BloodType.setter
 def BloodType(self, blood_type):
  self._blood_type = blood_type
 @property
 def Hobbies(self):
  return self._hobbies
 @Hobbies.setter
 def Hobbies(self, hobbies):
  self._hobbies = hobbies
 @property
 def date_of_brith(self):
  return self._date_of_birth
 @date_of_brith.setter
 def date_of_brith(self, date_of_brith):
  self._date_of_birth = date_of_brith

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import json
import importlib
def get_instance(str_stream, class_full_path=None):
 """
 :param str_stream: json的字符串形式 '{"Name": "Tom", "Sex": "Male", "BloodType": "A"}'
 :param class_full_path: package.module.class
 :return:
 """
 try:
  json_obj = json.loads(str_stream)
 except Exception as err:
  print("输入的字符串不符合JSON格式，请检查。")
  return None
 if class_full_path is None:
  return json_obj
 else:
  try:
   # 获取模块路径
   module_path = ".".join(class_full_path.split(".")[0:-1])
   # 获取类名称
   class_name = class_full_path.split(".")[-1]
   # 通过模块名加载模块
   CC = importlib.import_module(module_path)
   # 判断是否有class_name所代表的属性
   if hasattr(CC, class_name):
    # 获取模块中属性
    temp_obj = getattr(CC, class_name)
    # 实例化对象
    obj = temp_obj()
    for key in json_obj.keys():
     obj.__setattr__(key, json_obj[key])
    return obj
   else:
    pass
  except Exception as err:
   print(err)
   return None
def main():
 try:
  str1 = '{"Name": "Tom", "Sex": "Male", "BloodType": "A", "Hobbies": ["篮球", "足球"]}'
  person1 = get_instance(str1, class_full_path="AAA.Classes.Person")
  # 查看类型
  print(type(person1))
  # 查看属性
  print(person1.__dict__)
  # 查看指定属性
  print(person1.Name)
 except Exception as err:
  print(err)
if __name__ == "__main__":
 try:
  main()
 finally:
  sys.exit()