想要通过API接口调取数据，我们需要做下面几件事情：
1、获取一个KEY。
2、参考API文档里的接入方式和示例。
3、查看测试工具是否有需要的接口，响应实例的返回字段是否符合参数要求。
4、利用平台的文档中心和API测试工具，对接口进行测试、程序获取。
参数调用说明
1、公共参数
| 名称 | 类型 | 必须 | 描述 |
|---|---|---|---|
| key | String | 是 | 调用key（免费获取测试key和secret） |
| secret | String | 是 | 调用密钥 |
| api_name | String | 是 | API接口名称（包括在请求地址中）[item_search,item_get,item_search_shop等] |
| cache | String | 否 | [yes,no]默认yes，将调用缓存的数据，速度比较快 |
| result_type | String | 否 | [json,jsonu,xml,serialize,var_export]返回数据格式，默认为json，jsonu输出的内容中文可以直接阅读 |
| lang | String | 否 | [cn,en,ru]翻译语言，默认cn简体中文 |
| version | String | 否 | API版本 |
2、请求参数
请求参数：num_iid=520813250866&is_promotion=1
参数说明：num_iid:淘宝商品ID
is_promotion:是否获取取促销价
3、代码展示
{
"item": {
"num_iid": "605015710565",
"title": "幼儿童积木木头拼装宝宝玩具1益智力2岁3大颗粒6男孩女孩开发早教",
"desc_short": "",
"price": "29",
"orginal_price": "69.00",
"nick": "乐逗玩具专营店",
"num": "200",
"pic_url": "//img.alicdn.com/imgextra/i2/2379709713/O1CN01G2G9Nd2LcbY9zXh4I_!!2379709713.jpg",
"brand": "moondog",
"brandId": "15414976",
"rootCatId": "25",
"cid": "50023652",
"crumbs": [],
"detail_url": "https://item.taobao.com/item.htm?id=605015710565",
"desc": "<img class="desc_anchor" id="desc-module-1" src="http://assets.alicdn.com/kissy/1.0.0/build/imglazyload/spaceball.gif" />\n <p><img src="http://img.alicdn.com/imgextra/i4/2379709713/O1CN01bb4HnP2LcbYCCDxGT_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i3/2379709713/O1CN01WJZp3B2LcbYBHrCMl_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i1/2379709713/O1CN01oY9OiC2LcbYBSIB8J_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i4/2379709713/O1CN01ddvY2p2LcbY9zhhPi_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i1/2379709713/O1CN01cTJqkt2LcbYDhutuo_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i1/2379709713/O1CN01g9bzE32LcbY9X22gx_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i1/2379709713/O1CN01oH9oks2LcbYAgdePZ_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i3/2379709713/O1CN01Y9EQyl2LcbYAgcyrQ_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i4/2379709713/O1CN01KnT4MA2LcbY9mNrpk_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i3/2379709713/O1CN01IcK3ht2LcbY9zhMfY_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i4/2379709713/O1CN01g8vBAT2LcbkOUfEQI_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i3/2379709713/O1CN01iTLE142LcbY23qLz3_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i3/2379709713/O1CN01ByvLgB2LcbY9X1IyU_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i3/2379709713/O1CN01CYSwFz2LcbY9yIxvX_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i2/2379709713/O1CN01U7ys3x2LcbY9ExZ8H_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i3/2379709713/O1CN01ANnA6L2LcbYBHqC1O_!!2379709713.jpg" align="absmiddle" /><img src="http://img.alicdn.com/imgextra/i4/2379709713/O1CN01DdJIVY2LcbY7fyOha_!!2379709713.jpg" align="absmiddle" /> </p><img src="https://www.o0b.cn/i.php?t.png&rid=gw-1.62f719f3ae073&p=660797488&k=35734&t=1660361205" style="display:none" />",
"item_imgs": [
{
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],
"item_weight": 0,
"location": "浙江丽水",
"post_fee": " 免运费",
"express_fee": 0,
"ems_fee": 0,
"shipping_to": "",
"has_discount": "true",
"video": [],
"is_virtual": "",
"sample_id": "",
"is_promotion": "true",
"prop_imgs": {
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"property_alias": "",
"props": [
{
"name": "品牌",
"value": "moondog"
},
{
"name": "型号",
"value": "YLG-5687"
},
{
"name": "适用年龄",
"value": "12个月 18个月 2岁 4岁 3岁 6岁 5岁"
},
{
"name": "产地",
"value": "中国大陆"
},
{
"name": "适用性别",
"value": "男女通用"
},
{
"name": "玩具类型",
"value": "拼搭积木"
},
{
"name": "产品品类",
"value": "木制"
},
{
"name": "颜色分类",
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