一、api免费接口(让开发更高效、更便捷)
在现代软件开发中，API免费接口已经成为了不可或缺的一部分。它们能够帮助开发人员更快地构建应用程序，减少代码重复，提高开发效率。本文将介绍API免费接口的概念，以及如何使用它们来提高开发效率。
API免费接口是指允许开发人员免费访问的API。这些API通常由第三方提供，可以用于访问各种不同的服务和数据源。例如，开发人员可以使用API免费接口来访问社交媒体平台、天气预报、地图和其他数据源。
使用API免费接口非常简单。以下是一些基本步骤：
首先，你需要在API提供商的网站上注册一个账户。这通常是免费的，并且只需要几分钟时间。注册完成后，你将获得一个API密钥，这是访问API的凭证。
每个API都有一份文档，其中包含了API的详细信息，如请求和响应格式、支持的参数、限制等。你需要仔细阅读这些文档，以确保你正确地使用API。
一旦你阅读了API文档，就可以开始使用API了。你需要向API发送请求，以获取所需的数据。通常，API请求是通过HTTP协议发送的。你需要构建一个HTTP请求，包括API密钥和其他必要的参数。
一旦你发送了API请求，API将会返回一个响应。这个响应通常是一个JSON格式的数据。你需要解析这个响应，并将其转换为你的应用程序可以使用的格式。
使用API免费接口有很多优势。以下是一些主要的优势：
使用API免费接口可以减少代码重复，并且可以更快地构建应用程序。开发人员可以使用现有的API，而不必从头开始构建所有功能。
API免费接口可以帮助开发人员添加新的功能到他们的应用程序中。例如，开发人员可以使用天气API来添加天气预报功能到他们的应用程序中。
使用API免费接口可以提高数据的可靠性。API提供商通常会处理所有的数据验证和清理工作，以确保数据的准确性和一致性。
二、有哪些免费开放且收录城市较完整的天气 API 接口
国内的天气预报数据，主要是国家气象局和国外两个来源（指数据来源）。
国外方面主要是雅虎（XML格式，谷歌已经停掉了自家的天气API）；
国内数据由国家气象局提供（JSON格式）。
在知乎看到过一篇专业人士评论，雅虎可以提供全球范围的且非常精细的天气数据（小时级更新），但主要是通过计算机自动生成。而国家气象局则是各地经验丰富的专家人士结合计算机综合分析得出，在准确性上更胜一筹。我就这样信了！
气象局的天气预报主页：移动版普通版,仔细挖掘这两个地址可以发现很多好东西哦。
特点：接口多，来自http://weather.com.cn和http://mobile.weather.com.cn都有，次数不限制，服务稳定，功能全面，优先推荐。
实时天气1：http://www.weather.com.cn/data/sk/101190408.html
实时天气2：http://www.weather.com.cn/data/cityinfo/101190408.html
实时天气3（带时间戳）：http://mobile.weather.com.cn/data/sk/101010100.html?_=1381891661455
7天预报数据 URL： http://mobile.weather.com.cn/data/forecast/101010100.html?_=1381891660081
该接口来源气象局移动版网站，目测数据最为精确，详细接口格式如下：
{"c":{"c1":"101010100","c2":"beijing","c3":"北京","c4":"beijing","c5":"北京","c6":"beijing","c7":"北京","c8":"china","c9":"中国","c10":"1","c11":"010","c12":"100000","c13":"116.391","c14":"39.904","c15":"33","c16":"AZ9010","c17":"+8"},
{"fa":"01","fb":"03","fc":"10","fd":"5","fe":"0","ff":"0","fg":"0","fh":"0","fi":"06:21|17:40"},
{"fa":"07","fb":"07","fc":"19","fd":"12","fe":"0","ff":"0","fg":"0","fh":"0","fi":"06:22|17:38"},
{"fa":"02","fb":"00","fc":"15","fd":"5","fe":"8","ff":"8","fg":"3","fh":"1","fi":"06:23|17:37"},
{"fa":"00","fb":"00","fc":"16","fd":"4","fe":"0","ff":"0","fg":"0","fh":"0","fi":"06:24|17:35"},
{"fa":"00","fb":"00","fc":"18","fd":"7","fe":"0","ff":"0","fg":"0","fh":"0","fi":"06:25|17:34"},
{"fa":"00","fb":"01","fc":"18","fd":"8","fe":"0","ff":"0","fg":"0","fh":"0","fi":"06:26|17:32"},
{"fa":"01","fb":"01","fc":"16","fd":"6","fe":"0","ff":"0","fg":"0","fh":"0","fi":"06:27|17:31"}],
var format={fa:图片1,fb：图片2,fc:温度1,fd：温度2,fe:风向1,ff：风向2,fg:风力1,fh：风力2,fi:日出日落};
var weatherArr={"00":"晴","01":"多云","02":"阴","03":"阵雨","04":"雷阵雨","05":"雷阵雨伴有冰雹","06":"雨夹雪","07":"小雨","08":"中雨","09":"大雨","10":"暴雨","11":"大暴雨","12":"特大暴雨","13":"阵雪","14":"小雪","15":"中雪","16":"大雪","17":"暴雪","18":"雾","19":"冻雨","20":"沙尘暴","21":"小到中雨","22":"中到大雨","23":"大到暴雨","24":"暴雨到大暴雨","25":"大暴雨到特大暴雨","26":"小到中雪","27":"中到大雪","28":"大到暴雪","29":"浮尘","30":"扬沙","31":"强沙尘暴","53":"霾","99":""};
var fxArr={"0":"无持续风向","1":"东北风","2":"东风","3":"东南风","4":"南风","5":"西南风","6":"西风","7":"西北风","8":"北风","9":"旋转风"};
var flArr={"0":"微风","1":"3-4级","2":"4-5级","3":"5-6级","4":"6-7级","5":"7-8级","6":"8-9级","7":"9-10级","8":"10-11级","9":"11-12级"};
6天预报数据 URL： http://m.weather.com.cn/data/101190408.html
该接口来源网络，应该是一个流传比较久的接口，大发现准确性和稳定性可能不稳定。接口分析如下：
"city":"北京","city_en":"beijing","date_y":"2013年9月24日","date":"","week":"星期二","fchh":"11","cityid":"101010100",
"temp1":"22℃~11℃","temp2":"25℃~11℃","temp3":"26℃~13℃","temp4":"25℃~15℃","temp5":"25℃~16℃","temp6":"24℃~16℃",
"tempF1":"71.6℉~51.8℉","tempF2":"77℉~51.8℉","tempF3":"78.8℉~55.4℉","tempF4":"77℉~59℉","tempF5":"77℉~60.8℉","tempF6":"75.2℉~60.8℉",
"weather1":"多云转晴","weather2":"晴","weather3":"晴","weather4":"晴转多云","weather5":"阴转阵雨","weather6":"多云",
"img1":"1","img2":"0","img3":"0","img4":"99","img5":"0","img6":"99","img7":"0","img8":"1","img9":"2","img10":"3","img11":"1","img12":"99",
"img_title1":"多","img_title2":"晴","img_title3":"晴","img_title4":"晴","img_title5":"晴","img_title6":"晴","img_title7":"晴","img_title8":"多云","img_title9":"阴","img_title10":"阵雨","img_title11":"多云","img_title12":"多云",
"wind1":"北风3-4级转微风","wind2":"微风","wind3":"微风","wind4":"微风","wind5":"微风","wind6":"微风",
"fl1":"3-4级转小于3级","fl2":"小于3级","fl3":"小于3级","fl4":"小于3级","fl5":"小于3级","fl6":"小于3级",
"index":"较冷","index_d":"建议着大衣、呢外套加毛衣、卫衣等服装。体弱者宜着厚外套、厚毛衣。因昼夜温差较大，注意增减衣服。",
"index48":"较舒适","index48_d":"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。",
#紫外洗车旅游舒适指数晨练晾晒过敏
"st1":"21","st2":"12","st3":"24","st4":"12","st5":"25","st6":"14",#不明
三、免费API接口的试用开发文档有吗
Api接口就好比一个媒介工具，比如买东西的时候我们要计算价格，可以用算盘、计算器、手机或者电脑进行计算得出结果。接口与其类似，当你需要用到这个功能时就可以调用。
Api接口可以应用于pc端、app、软件等，除了接口一般会有Api接口文档说明来帮助开发者使用。
下面来分享一下免费的api接口以及文档说明：
接口地址：http://v.juhe.cn/postcode/query
请求示例：http://v.juhe.cn/postcode/query?postcode=215001&key=申请的KEY
接口备注：通过邮编查询对应的地名
postcode是 string邮编，如：215001
key是 string应用APPKEY(应用详细页查询)
pagesize否 int每页返回，默认:20,最大不超过50
dtype否 string返回数据的格式,xml或json，默认json
接口地址：http://apis.juhe.cn/mobile/get
请求示例：http://apis.juhe.cn/mobile/get?phone=13429667914&key=您申请的KEY
phone是 int需要查询的手机号码或手机号码前7位
key是 string应用APPKEY(应用详细页查询)
dtype否 string返回数据的格式,xml或json，默认json
city string城市，(北京、上海、重庆、天津直辖市可能为空)
areacode string区号，(部分记录可能为空)
zip string邮编，(部分记录可能为空)
<?xml version="1.0" encoding="utf-8"?>
<resultcode>200</resultcode>
<reason>Return Successd!</reason>
<province>浙江</province>
<areacode>0571</areacode>
<company>中国移动</company>
接口地址：http://op.juhe.cn/onebox/movie/video
请求事例http://op.juhe.cn/onebox/movie/video?key=APPKEY&q=%E5%BA%B7%E7%86%99%E7%8E%8B%E6%9C%9D
接口备注：电影：q=心花路放；电视剧：q=继承者们；动漫：q=柯南
key是 string应用APPKEY(应用详细页查询)
dtype否 string返回数据的格式,xml或json，默认json
"act":"格兰特·古斯汀埃涅·赫德森汤姆·卡瓦纳夫",
"desc":"《闪电侠》精彩看点：二次元超级英雄再登电视荧屏，《闪电侠》无缝对接《绿箭侠》闪耀登场。《闪电侠》剧情梗概：《闪电侠》的漫画连载开始于1940年，讲述了一名拥有超级速度的学生的故事。50年代起，这个角色则被重新诠释，成为了巴里·艾伦，一名为警署工作的科学家，使用他的超级速度来对抗超级反派们。",
"cover":"http://i.gtimg.cn/qqlive/img/jpgcache/files/qqvideo/0/0l01jm9yobh4xo4.jpg",
"youku":"http://v.youku.com/v_show/id_XODQ1NTAzNDE2.html?tpa=dW5pb25faWQ9MTAyMjEzXzEwMDAwNl8wMV8wMQ",
"qq":"http://v.qq.com/cover/0/0l01jm9yobh4xo4/g0015dn2fw1.html",
"leshi":"http://www.letv.com/ptv/vplay/21416940.html",
"pptv":"http://v.pptv.com/show/2uhW1T2jE1G0Mr4.html",
"sohu":"http://tv.sohu.com/20141210/n406824703.shtml?txid=4e4df35dda9d8ed32c874b1ad590ef59"
"detail_url":"http://www.360kan.com/tv/PrVtaX7kRzXsMn.html",
"cover":"http://p2.qhimg.com/t01f969930fae67d1ec.jpg",
"detail_url":"http://www.360kan.com/tv/Q4RvaqOoRmDuMX.html",
"cover":"http://p6.qhimg.com/t0160a8a6f5b768034a.jpg",
"detail_url":"http://www.360kan.com/tv/Q4Frc3GoRmbuMX.html",
"cover":"http://p7.qhimg.com/t01513514907831e055.jpg",
"detail_url":"http://www.360kan.com/tv/QrFob33oRGboMX.html",
"cover":"http://p6.qhimg.com/d/_hao360/video/img200909_18_145544738.jpg",
"detail_url":"http://www.360kan.com/tv/QrRtbaOpRz4nOH.html",
"cover":"http://p1.qhimg.com/t01d2996b3305923b91.jpg",
"url":"http://baike.so.com/doc/2041872.html",
"image":"http://p3.qhimg.com/dmsmty/120_110_100/t019f2fb2f92c6cb2cf.jpg"
"url":"http://baike.so.com/doc/3938849.html",
"image":"http://p2.qhimg.com/dmsmty/120_110_100/t0169332727e692e9fa.jpg"
"url":"http://baike.so.com/doc/7521211.html",
"image":"http://p0.qhimg.com/dmsmty/120_110_100/t01d271d8c090330ae2.jpg"
http://sapi.manmanbuy.com/Search.aspx?AppKey=申请appkey&Key=搜索关键词&Class=分类ID&Brand=品牌ID&Site=商城ID&PriceMin=最低价&PriceMax=最高价&PageNum=页号&PageSize=每页商品数&OrderBy=排序方式&ZiYing=是否自营&ExtraParameter=扩展参数
http://sapi.manmanbuy.com/Search.aspx?AppKey=123456&Key=iphone&Class=0&Brand=0&Site=0&PriceMin=0&PriceMax=0&PageNum=1&PageSize=30&OrderBy=score&ZiYing=false&ExtraParameter=0
返回结果示例(以iphone为例，显示前2条商品信息)：
{"State":1000,"SearchItemsCount":101520,"SearchCount":5109,"ClassList":"57|1074|手机,893|29964|iPhone配件,892|19512|手机保护套,910|11169|苹果配件, 890|8766|手机贴膜,894|6201|其它配件,900|3189|移动电源,889|2067|手机充电器,898|1923|电池/充电器,101|1518|耳机,888|1290|手机电池, 100|1074|蓝牙耳机","BrandList":"155|47184|苹果,0|40476|,634|2166|洛克,6|1134|三星,622|1023|倍思,261|564|品胜,652|558|SGP, 639|537|ESR,623|474|邦克仕,10|423|飞利浦,604|330|摩米士,664|291|优胜仕","SiteList":"1|66732|京东商城,4|8478|亚马逊,3|7917|当当,13|4821|1号店,6|4605|苏宁易购,8|4149|国美在线,11|3882|易迅网,9|360|新蛋网,161|168|飞牛网,185|147|顺电网,124|123|高鸿商城, 123|69|华强北","SearchResultList":[{"spname":"苹果(Apple)iPhone 6(A1586) 16GB金色移动联通电信4G手机","sppic":"http://img14.360buyimg.com/n7/jfs/t277/193/1005339798/768456/29136988/542d0798N19d42ce3.jpg","spurl":"http://item.jd.com/1217499.html","spprice":"5188.00","className":"手机","brandName":"苹果","siteName":"京东商城","commentUrl":"http://item.jd.com/1217499.html#comments-list","commentCount":"8773","TitleHighLighter":"苹果(Apple)iPhone 6(A1586) 16GB金色移动联通电信4G手机","ziying":"1","siteid":"1","id":"98084930"},{"spname":"苹果(Apple)iPhone 6 Plus(A1524) 16GB金色移动联通电信4G手机","sppic":"http://img14.360buyimg.com/n7/jfs/t346/302/1010969394/231745/50f20b36/542d0e26N894372e9.jpg","spurl":"http://item.jd.com/1217524.html","spprice":"5988.00","className":"手机","brandName":"苹果","siteName":"京东商城","commentUrl":"http://item.jd.com/1217524.html#comments-list","commentCount":"10288","TitleHighLighter":"苹果(Apple)iPhone 6 Plus(A1524) 16GB金色移动联通电信4G手机","ziying":"1","siteid":"1","id":"98084932"}]}
关于免费的数据api接口到此分享完毕，希望能帮助到您。
