接口通常指的是日常生活中用到的接口，主要是指物品上的外接接口，以手机充电口举例，有Micro USB接口、type-c接口，还有Lightning接口（ios设备），这三个接口就是一个接口定义，规定了这个充电口的形状、大小。这就是接口。
API是Application Program Interface的缩写，叫做应用程序接口，是一组定义、程序及协议的集合，主要功能是提供通用功能集，实现计算机软件之间的相互通信。我们通过API接口可以实现特定的功能，而不需要了解其内部实现细节。可以把API接口理解为是特定服务的一种封装，将服务封装起来提供给他人调用，这样一来很多功能不需要从新开发。
比如，我们想要知道一周天气如何，如果由自己来实现这个功能很难，因为天气数据只有气象部门才知道。那该如何知道天气信息呢？气象部门提供数据API给我们使用，我们只要输入地区就会知道该地区一周的天气情况，但我们并不需要了解这天气预报是如何实现的。API调取数据也是同样的道理。
以淘宝关键字接口为例：
编辑
通过关键字就可以搜索到你想要的数据，下面是测试代码显示结果：
{
"items": {
"page": "1",
"real_total_results": 1000,
"total_results": 1000,
"page_size": 40,
"pagecount": 50,
"data_from": "hid",
"item": [
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"title": "优衣库 女装 棉质T恤(长袖) 430273 UNIQLO",
"pic_url": "img.alicdn.com/imgextra/i1…",
"promotion_price": "79.00",
"price": "79.00",
"sales": 0,
"num_iid": "627543382638",
"seller_nick": "优衣库官方旗舰店",
"seller_id": "0",
"detail_url": "item.taobao.com/item.htm?id…",
"data_f": null,
"data_update": "2021-10-18 04:05:29"
},
{
"title": "Data Zara新款 女装 垂褶直筒裙 08000878800",
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"promotion_price": "179.00",
"price": "299.00",
"sales": 22,
"num_iid": "649663627852",
"seller_nick": "雨雨宝代购",
"seller_id": "2209090117041",
"detail_url": "item.taobao.com/item.htm?id…",
"data_f": null,
"data_update": "2021-10-16 12:45:43"
},
{
"title": "Data Zara早秋新款 女装 黑色纹理西装外套 08542182800",
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"sales": 5,
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"seller_nick": "雨雨宝代购",
"seller_id": "2209090117041",
"detail_url": "item.taobao.com/item.htm?id…",
"data_f": null,
"data_update": "2021-10-16 12:49:30"
},
{
"title": "Data Zara早秋新款 TRF 女装 阔腿牛仔裤 06688224800",
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"sales": 13,
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"seller_nick": "雨雨宝代购",
"seller_id": "2209090117041",
"detail_url": "item.taobao.com/item.htm?id…",
"data_f": null,
"data_update": "2021-10-16 12:56:19"
},
{
"title": "Data Zara早秋新款 女装 带垫肩修身西装外套 08526707706",
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"detail_url": "item.taobao.com/item.htm?id…",
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"data_update": "2021-10-16 12:58:46"
},
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"title": "【返场可用券】女装 乔其纱荷叶边领衬衫(优衣库云朵衫)429418",
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"data_update": "2021-10-26 01:29:59"
},
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"title": "女装 法兰绒松紧长裤 419869 优衣库UNIQLO",
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"data_update": "2021-10-17 03:34:41"
},
{
"title": "优衣库 女装/情侣装 便携式防紫外线连帽外套(防晒衣) 419912",
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},
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"data_f": "Ha",
"data_update": "2022-09-07 19:44:46"
},
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},
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},
{
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"pic_url": "img.alicdn.com/imgextra/i3…",
"promotion_price": "499.00",
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"num_iid": "653812517886",
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"seller_id": "0",
"detail_url": "item.taobao.com/item.htm?id…",
"data_f": "ez",
"data_update": "2021-12-02 23:35:01"
},
{
"title": "【漫囧】鬼灭之刃 灶门祢豆子 圣诞 睡衣 女装 cos服装 现货",
"pic_url": "gw.alicdn.com/imgextra/O1…",
"promotion_price": "88.00",
"price": "176.00",
"sales": 20000,
"num_iid": "607612962557",
"seller_nick": "漫囧旗舰店",
"seller_id": "2940718379",
"detail_url": "item.taobao.com/item.htm?id…",
"data_f": "Ha",
"data_update": "2022-09-07 17:28:04"
},
{
"title": "ZARA 新款 TRF 女装 丝缎质感印花连衣裙 08342310800",
"pic_url": "img.alicdn.com/imgextra/i4…",
"promotion_price": "259.00",
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"num_iid": "652476230338",
"seller_nick": "zara官方旗舰店",
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"data_update": "2021-11-16 21:18:07"
},
{
"title": "优衣库 女装 法兰绒格子半开领上衣(长袖) 421610 UNIQLO",
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{
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"seller_nick": "优衣库官方旗舰店",
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},
{
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},
{
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{
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},
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{
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{
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{
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{
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注册可以赠送测试，亲测有效：获取Key和secret
