golang time.time相关

JSON does not define any representation for encoding date/time 
information. 

It *appears* that people tend to use ISO-8601 for them [1]. 
May be that's what Go does. 
Note that the documentation for the encoding/json package does not 
mention dates and times at all. 

1. http://en.wikipedia.org/wiki/ISO_8601 

http://blog.charmes.net/2015/08/json-date-management-in-golang_7.html