python解决json序列化时间格式

简单实例

import json
from datetime import datetime
from datetime import date

info = {
    "name": "ffm",
    "birth": datetime.datetime.now(),
    "age": 18,
    'hobbies': ['music', 'read', 'dancing'],
    'addr': {
        'country': 'China',
        'city': 'shanghai'
    }
}

class CJsonEncoder(json.JSONEncoder):

    def default(self, obj):
        if isinstance(obj, datetime):
            return obj.strftime('%Y-%m-%d %H:%M:%S')
        elif isinstance(obj, date):
            return obj.strftime('%Y-%m-%d')
        else:
            return json.JSONEncoder.default(self, obj)

json_info=json.dumps(info, cls=CJsonEncoder)

#进一步的进阶使用，将MongoDB和sqlalchemy加入
from datetime import date, datetime
# MongoDB的id
from bson import ObjectId
import json
# sqlalchemy的元类
from sqlalchemy.ext.declarative import DeclarativeMeta

class JSONEncoder(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, datetime):
            return obj.strftime('%Y/%m/%d %H:%M:%S')
        elif isinstance(obj, date):
            return obj.strftime('%Y-%m-%d')
        # 如果是MongoDB的id，将其转成字符串
        elif isinstance(obj, ObjectId):
            return str(obj)
        elif isinstance(obj, bytes):
            return obj.decode()
        # 如果是sqlalchemy数据库对象将其拆分，拼接成字典
        elif isinstance(obj.__class__, DeclarativeMeta):
            res = {}
            for key in obj.__dict__:
                if key[0] != "_":
                    res[key] = obj.__dict__[key]
            return res
        else:
            return json.JSONEncoder.default(self, obj)