找个免费的天气预报API真难有木有？？？

免费的天气预报API，可以查询全国天气预报，生活指数、实况、PM2.5等信息。

接口地址：http://op.juhe.cn/onebox/weather/query

支持格式：json/xml

请求方式：http get/post

请求示例：http://op.juhe.cn/onebox/weather/query?cityname=%E6%B8%A9%E5%B7%9E&key=您申请的KEY

接口备注：根据城市查询天气，未来5天、生活指数、PM2.5

请求参数说明：

返回参数说明：

JSON返回示例：

{"reason": "查询成功","result": {"data": {"realtime": {"city_code": "101210701","city_name": "温州",     /*城市*/"date": "2014-10-15",  /*日期*/"time": "09:00:00",     /*更新时间*/"week": 3,"moon": "九月廿二","dataUptime": 1413337811,"weather": {    /*当前实况天气*/"temperature": "19",     /*温度*/"humidity": "54",     /*湿度*/"info": "雾","img": "18" /*18是雾这种天气所对应的图片的ID，每种天气的图片需要您自己设计，或者请阅读https://www.juhe.cn/docs/api/id/39/aid/117*/},"wind": {"direct": "北风","power": "1级","offset": null,"windspeed": null}},"life": {     /*生活指数*/"date": "2014-10-15","info": {"chuanyi": [     /*穿衣指数*/"较舒适","建议着薄外套或牛仔衫裤等服装。年老体弱者宜着夹克衫、薄毛衣等。昼夜温差较大，注意适当增减衣服。"],"ganmao": [    /*感冒指数*/"较易发","昼夜温差较大，较易发生感冒，请适当增减衣服。体质较弱的朋友请注意防护。"],"kongtiao": [   /*空调指数*/"较少开启","您将感到很舒适，一般不需要开启空调。"],"wuran": [     /*污染指数*/"良","气象条件有利于空气污染物稀释、扩散和清除，可在室外正常活动。"],"xiche": [     /*洗车指数*/"较适宜","较适宜洗车，未来一天无雨，风力较小，擦洗一新的汽车至少能保持一天。"],"yundong": [     /*运动指数*/"较适宜","天气较好，但风力较大，推荐您进行室内运动，若在户外运动请注意防风。"],"ziwaixian": [   /*紫外线*/"中等","属中等强度紫外线辐射天气，外出时建议涂擦SPF高于15、PA+的防晒护肤品，戴帽子、太阳镜。"]}},"weather": [   /*未来几天天气预报*/{"date": "2014-10-15","info": {"day": [     /*白天天气*/"0",     /*天气ID*/"晴",     /*天气*/"24",     /*高温*/"东北风",     /*风向*/"3-4 级"      /*风力*/],"night": [    /*夜间天气*/"0","晴","13","东北风","3-4 级"]},"week": "三","nongli": "九月廿二"},{"date": "2014-10-16","info": {"dawn": ["0","晴","13","东北风","3-4 级"],"day": ["0","晴","25","东北风","3-4 级"],"night": ["1","多云","15","东北风","3-4 级"]},"week": "四","nongli": "九月廿三"},{"date": "2014-10-17","info": {"dawn": ["1","多云","15","东北风","3-4 级"],"day": ["1","多云","26","东北风","3-4 级"],"night": ["1","多云","16","东北风","3-4 级"]},"week": "五","nongli": "九月廿四"},{"date": "2014-10-18","info": {"dawn": ["1","多云","16","东北风","3-4 级"],"day": ["1","多云","26","东风","3-4 级"],"night": ["1","多云","18","东风","3-4 级"]},"week": "六","nongli": "九月廿五"},{"date": "2014-10-19","info": {"dawn": ["1","多云","18","东风","3-4 级"],"day": ["1","多云","27","东风","3-4 级"],"night": ["1","多云","19","东南风","3-4 级"]},"week": "日","nongli": "九月廿六"},{"date": "2014-10-20","info": {"dawn": ["1","多云","19","东南风","3-4 级"],"day": ["1","多云","27","东南风","3-4 级"],"night": ["2","阴","18","南风","3-4 级"]},"week": "一","nongli": "九月廿七"},{"date": "2014-10-21","info": {"dawn": ["2","阴","18","南风","3-4 级"],"day": ["1","多云","26","东北风","3-4 级"],"night": ["2","阴","17","","微风"]},"week": "二","nongli": "九月廿八"}],"pm25": {    /*PM2.5*/"key": "Wenzhou","show_desc": 0,"pm25": {"curPm": "97","pm25": "72","pm10": "97","level": 2,"quality": "良","des": "可以接受的，除极少数对某种污染物特别敏感的人以外，对公众健康没有危害。"},"dateTime": "2014年10月15日09时","cityName": "温州"},"date": null,"isForeign": 0}},"error_code": 0
}

服务级错误码参照(error_code)：

系统级错误码参照：

错误码格式说明（示例：200201）：

示例代码