连接天气API实现即时天气查询的SpringMVC项目 Maven + SpringMVC + GSON 1获取本地ip 2将ip拼接到百度地图api上，调用api返回位置json http://api.map.baidu.com/location/ip?ak=F454f8a5efe5e577997931cc01de3974&ip=120.134.33.9 3解析json，取省和市的字符串值，把省、市保存到服务器 4拼接天气api+city，调用后返回json，解析后得到天气、温度、pm2.5等 https://market.aliyun.com/products/57126001/cmapi014302.html?spm=5176.11842841.1178304.2.89Az5s#sku=yuncode830200000 5将省市天气等model.addAttribute()到前端
备注： 获取定位：从h5调用GEOLocation api获取经纬度和城市信息 把城市信息字符串通过a传递给后台, 后台调用天气api，解析出天气信息，传递给前端展示
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