利用python实现JSON文档与Python对象互相转换

{
  "name": "孤寒者",
  "age": 18,
  "height": 130
}

# coding=utf-8
import json

with open('test.json', 'r', encoding='utf-8') as f:
    jsonStr = f.read()

    product = json.loads(jsonStr)
    print(type(product))
    print(product['name'])

# coding=utf-8
import json
class Product:
    def __init__(self, d):
        self.__dict__ = d
with open('test.json', 'r', encoding='utf-8') as f:
    jsonStr = f.read()
    product = json.loads(jsonStr, object_hook=Product)
    print(type(product))
    # print(product['name'])        # 这样就不行了~
    print(product.name)

# coding=utf-8
import json

class Product:
    def __init__(self, d):
        self.__dict__ = d
with open('test.json', 'r', encoding='utf-8') as f:
    jsonStr = f.read()
    def json2Product(d):
        return Product(d)
    product1 = json.loads(jsonStr, object_hook=json2Product)

    print(type(product1))
    print(product1.name)

# coding=utf-8
import json
class Product:
    def __init__(self, name, age, height):
        self.name = name
        self.age = age
        self.height = height
product = Product('孤寒者', 18, 130)

def product2Dict(obj):
    return {
        'name': obj.name,
        'age': obj.age,
        'height': obj.height
    }
# dumps()方法的default参数指定转换函数。
jsonStr = json.dumps(product, default=product2Dict, ensure_ascii=False)
print(jsonStr)
print(type(jsonStr))

[
  {
    "name": "孤寒者",
    "age": 18,
    "height": 130
  },
  {
    "name": "小张",
    "age": 18,
    "height": 80
  }
]

# coding=utf-8
import json
class Product:
    def __init__(self, d):
        self.__dict__ = d
with open('test.json', 'r', encoding='utf-8') as f:
    jsonStr = f.read()
    products = json.loads(jsonStr, object_hook=Product)
    print(products)

# coding=utf-8
import json
class Product:
    def __init__(self, d):
        self.__dict__ = d
with open('test.json', 'r', encoding='utf-8') as f:
    jsonStr = f.read()
    products = json.loads(jsonStr, object_hook=Product)
    print(products)
    for product in products:
        print(product.name)
    print("*"*25)
    # 解题部分：
    def product2Dict(obj):
        return {
            'name': obj.name,
            'age': obj.age,
            'height': obj.height
        }
    jsonStr = json.dumps(products, default=product2Dict, ensure_ascii=False)
    print(jsonStr)
    print(type(jsonStr))