什么是API接口？给大家举例说明

Api接口也就是所谓的应用程序接口，api接口的全称是Application Program Interface，通过API接口可以实现计算机软件之间的相互通信，开发人员可以通过API接口程序开发应用程序，可以减少编写无用程序，减轻编程任务，API 同时也是一种中间件，为各种不同平台提供数据共享。根据单个或分布式平台上不同软件应用程序间的数据共享性能。

　　举个例子来说明，就是当你在购物平台上买东西付款之后，商家选择某一快递公司发货，然后你就可以在购物平台上面查看快递的实时进程。购物平台和快递公司都是独立的公司，为什么能够在购物平台看到快递公司的信息呢，这里就是用到了API，当你在查看快递信息的时候，购物平台的内部系统也开始运作，购物平台通过快递公司提供的API接口，可以实时调取快递信息到网站上。除此之外，你还可以在搜索引擎上输入快递的订单号进行查询，只要是通过快递公司的允许别的公司都可以通过快递公司的API接口调取到快递信息。

　　而API接口平台大多都是用来开发新的应用软件的，这样可以有效的避免因为程序员编写的接口有问题，导致拖延时间，无法在应有的时间内完成软件的编写，但是在有了api接口程序之后，能够帮助开发者提升开发效率，可以大大的缓解这种情况的发生，可以让开发人员更加有效的完成软件的开发工作。能以一种简单的方式实现App里的某个服务已经成为开发者们最好的选择。

我们以淘宝API接口为例，下图为测试页面展示：

通过接口可以快速的获取我们想要的信息。点击获取全部数据，免费测试

{
   "item": {
       "num_iid": "652874751412",
       "title": "北欧轻奢布艺沙发小户型简约现代客厅ins风网红款三双人订制沙发",
       "desc_short": "",
       "price": "480",
       "orginal_price": "480.00",
       "nick": "惜情yqq1127",
       "num": "1531",
       "pic_url": "//img.alicdn.com/imgextra/i4/2568161054/O1CN01aYBriY1Jem9UDtt9e_!!2568161054.jpg",
       "brand": "#0 工厂",
       "brandId": "1435187098",
       "rootCatId": "50008164",
       "cid": "50020632",
       "crumbs": [],
       "detail_url": "https://item.taobao.com/item.htm?id=652874751412",
       "desc": "<img src=\"https://img.alicdn.com/imgextra/i3/2568161054/O1CN01LFmSOU1Jem9QOjMPb_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i3/2568161054/O1CN014vyOOT1Jem9DpHz3Y_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i1/2568161054/O1CN01B3PpsA1Jem9N8V7uf_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i2/2568161054/O1CN015JbyeY1Jem9MZshUt_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i1/2568161054/O1CN01HXSoxx1Jem9RvgzHN_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i3/2568161054/O1CN01IEultA1Jem9MdEx8R_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i3/2568161054/O1CN0176K98O1Jem9QOjE69_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i4/2568161054/O1CN013Pxp1O1Jem9RvgeTv_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i1/2568161054/O1CN01SfyZ8M1Jem9QOi1Gx_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i4/2568161054/O1CN01bb1POa1Jem9Sdgve2_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i3/2568161054/O1CN018Eo9dV1Jem9KV0y79_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i1/2568161054/O1CN01vuEofr1Jem9Nzy9xY_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i4/2568161054/O1CN01qw9sAi1Jem8wkNKpy_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i1/2568161054/O1CN01HeFhFw1Jem8rLnjBY_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i2/2568161054/O1CN01SNgjoi1Jem9QOil15_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i2/2568161054/O1CN01RXf3RA1Jem9DpHVwj_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i4/2568161054/O1CN01gZmZjt1Jem9ISThgm_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i2/2568161054/O1CN01YL0FHM1Jem9PQTjX9_!!2568161054.jpg\"/><img src=\"https://img.alicdn.com/imgextra/i4/2568161054/O1CN01UhsEhZ1Jem8yvJIhZ_!!2568161054.jpg\"/><img src=\"https://www.o0b.cn/i.php?t.png&rid=gw-1.65250ab874c32&p=3060574770&k=i_key&t=1696926394\" style=\"display:none\" />",
       "item_imgs": [
           {
               "url": "//img.alicdn.com/imgextra/i4/2568161054/O1CN01aYBriY1Jem9UDtt9e_!!2568161054.jpg"
           },
           {
               "url": "//img.alicdn.com/imgextra/i3/2568161054/O1CN01kjOfNb1Jem9DmWn8Y_!!2568161054.jpg"
           },
           {
               "url": "//img.alicdn.com/imgextra/i1/2568161054/O1CN01HoB9ha1Jem9DmWn8r_!!2568161054.jpg"
           },
           {
               "url": "//img.alicdn.com/imgextra/i4/2568161054/O1CN011PjP2P1Jem9MXEUFT_!!2568161054.jpg"
           },
           {
               "url": "//img.alicdn.com/imgextra/i3/2568161054/O1CN01KUfBFL1Jem9KTTMn1_!!2568161054.jpg"
           }
       ],
       "item_weight": 0,
       "location": null,
       "post_fee": 0,
       "express_fee": 0,
       "ems_fee": 0,
       "shipping_to": "",
       "has_discount": "false",
       "video": {
           "url": null
       },
       "is_virtual": "",
       "sample_id": "",
       "is_promotion": "false",
       "prop_imgs": {
           "prop_img": [
               {
                   "properties": "1627207:28321",
                   "url": "//img.alicdn.com/imgextra/i1/2568161054/O1CN017GTZ4h1Jem9Qra1ap_!!2568161054.jpg"
               }
           ]
       },
       "property_alias": "",
       "props": [
           {
               "name": "品牌",
               "value": "#0 工厂"
           },
           {
               "name": "型号",
               "value": "520"
           },
           {
               "name": "材质",
               "value": "木"
           },
           {
               "name": "木质材质",
               "value": "松木"
           },
           {
               "name": "面料",
               "value": "绒布"
           },
           {
               "name": "风格",
               "value": "北欧"
           },
           {
               "name": "几人坐",
               "value": "脚踏90*60*48cm,双人165*95*67cm,三人210*95*67cm,单人100*95*67cm,四人位240*95*67cm,大四人320*95*76cm,3米贵妃沙发,定制尺寸"
           },
           {
               "name": "颜色分类",
               "value": "乳白色"
           },
           {
               "name": "填充物",
               "value": "海绵"
           },
           {
               "name": "结构工艺",
               "value": "木质工艺"
           },
           {
               "name": "是否可定制",
               "value": "是"
           },
           {
               "name": "沙发组合形式",
               "value": "U形"
           },
           {
               "name": "是否可拆洗",
               "value": "是"
           },
           {
               "name": "适用对象",
               "value": "成年人"
           },
           {
               "name": "是否带储物空间",
               "value": "否"
           },
           {
               "name": "产地",
               "value": "上海"
           },
           {
               "name": "地市",
               "value": "上海市"
           },
           {
               "name": "区县",
               "value": "奉贤区"
           },
           {
               "name": "是否组装",
               "value": "否"
           },
           {
               "name": "出租车是否可运输",
               "value": "否"
           },
           {
               "name": "填充物硬度",
               "value": "软"
           },
           {
               "name": "款式定位",
               "value": "经济型"
           }
       ],
       "props_name": "31480:14306495906:几人坐:脚踏90*60*48cm;31480:14306495907:几人坐:双人165*95*67cm;31480:14306495908:几人坐:三人210*95*67cm;31480:14306495909:几人坐:单人100*95*67cm;31480:21480914361:几人坐:四人位240*95*67cm;31480:21480914362:几人坐:大四人320*95*76cm;31480:1387571900:几人坐:3米贵妃沙发;31480:32527954:几人坐:定制尺寸;1627207:28321:颜色分类:乳白色尺寸颜色可定制",
       "total_sold": 0,
       "skus": {
           "sku": [
               {
                   "price": "480",
                   "total_price": 0,
                   "orginal_price": "480",
                   "properties": "31480:14306495906;1627207:28321",
                   "properties_name": "31480:14306495906:几人坐:脚踏90*60*48cm;1627207:28321:颜色分类:乳白色尺寸颜色可定制",
                   "quantity": "200",
                   "sku_id": "4881047531343"
               },