json序列化dataime, 参考https://l1nwatch.gitbooks.io/writing_solid_python_code_gitbook/content/%E7%AC%AC%204%20%E7%AB%A0%20%E5%BA%93/readme.html

jsondumpsdataime.py

import datetime
from time import mktime
try:
    import simplejson as json
except ImportError:
    import json

class DateTimeEncoder(json.JSONEncoder):    # 为 JSONEncoder 进行扩展
    def default(self, obj):
        if isinstance(obj, datetime.datetime):
            return obj.strftime("%Y-%m-%d %H:%M:%S")
        elif isinstance(obj, date):
            return obj.strftime("%Y-%m-%d")
        return json.JSONEncoder.default(self, obj)

d = datetime.datetime.now()
print(json.dumps(d, cls=DateTimeEncoder))    # 使用 cls 指定编码器的名称