如何使用以下 URL 解析代码、消息、计算时间、城市、id、国家、名称:http://openweathermap.org/data/2.1/forecast/city/524901
{ "cod":"200","message":"kf","calctime":0.0342,"url":"http:\/\/openweathermap.org\/city\/524901",
"city":
{
"id":524901,
"coord":
{
"lon":37.615555,"lat":55.75222
},
"country":"RU","name":"Moscow","dt_calc":1356948005,"stations_count":6
},