JSON @attributes
我很难理解如何读取包含“@attributes”的JSON对象。
Javascript ：
$.ajax({ type: "GET", dataType: 'json', url: "http://..../script/weather.php?r="+req, success: function(data){ alert(data.weather.forecast_information.city[0].data) } }); JSON响应：
{ "@attributes": { "version": "1" }, "weather": { "@attributes": { "module_id": "0", "tab_id": "0", "mobile_row": "0", "mobile_zipped": "1", "row": "0", "section": "0" }, "forecast_information": { "city": { "@attributes": { "data": "Kreuzlingen, Thurgovia" } }, "postal_code": { "@attributes": { "data": "kreuzlingen" } }, "latitude_e6": { "@attributes": { "data": "" } }, "longitude_e6": { "@attributes": { "data": "" } }, "forecast_date": { "@attributes": { "data": "2012-07-03" } }, "current_date_time": { "@attributes": { "data": "1970-01-01 00:00:00 +0000" } }, "unit_system": { "@attributes": { "data": "US" } } }, "current_conditions": { "condition": { "@attributes": { "data": "Cloudy" } }, "temp_f": { "@attributes": { "data": "70" } }, "temp_c": { "@attributes": { "data": "21" } }, "humidity": { "@attributes": { "data": "Humidity: 68%" } }, "icon": { "@attributes": { "data": "/ig/images/weather/cloudy.gif" } }, "wind_condition": { "@attributes": { "data": "Wind: N at 0 mph" } } }, "forecast_conditions": [ { "day_of_week": { "@attributes": { "data": "Tue" } }, "low": { "@attributes": { "data": "55" } }, "high": { "@attributes": { "data": "72" } }, "icon": { "@attributes": { "data": "/ig/images/weather/thunderstorm.gif" } }, "condition": { "@attributes": { "data": "Thunderstorm" } } }, { "day_of_week": { "@attributes": { "data": "Wed" } }, "low": { "@attributes": { "data": "66" } }, "high": { "@attributes": { "data": "79" } }, "icon": { "@attributes": { "data": "/ig/images/weather/chance_of_storm.gif" } }, "condition": { "@attributes": { "data": "Chance of Storm" } } }, { "day_of_week": { "@attributes": { "data": "Thu" } }, "low": { "@attributes": { "data": "61" } }, "high": { "@attributes": { "data": "77" } }, "icon": { "@attributes": { "data": "/ig/images/weather/chance_of_storm.gif" } }, "condition": { "@attributes": { "data": "Chance of Storm" } } }, { "day_of_week": { "@attributes": { "data": "Fri" } }, "low": { "@attributes": { "data": "63" } }, "high": { "@attributes": { "data": "79" } }, "icon": { "@attributes": { "data": "/ig/images/weather/chance_of_rain.gif" } }, "condition": { "@attributes": { "data": "Chance of Rain" } } } ] } }
错误（Chrome）;
未捕获的TypeError：无法读取未定义的属性“数据”
问题是，如何让“Kreuzlingen，Thurgovia”保持警惕？
得到这样的：
alert(data.weather.forecast_information.city["@attributes"].data)