API 对于程序员的多元用法：从基础到实战

import requests# 假设这里有一个新闻 API 的 URLurl = "https://example.com/api/news"response = requests.get(url)if response.status_code == 200:    data = response.json()    for news_item in data:        print(news_item["title"])else:    print("请求失败，状态码：", response.status_code)

# 假设这里有航班 API、酒店 API 和景点 API 的 URLflight_url = "https://example.com/api/flights"hotel_url = "https://example.com/api/hotels"attraction_url = "https://example.com/api/attractions"# 分别获取航班、酒店和景点数据flight_response = requests.get(flight_url)hotel_response = requests.get(hotel_url)attraction_response = requests.get(attraction_url)if flight_response.status_code == 200 and hotel_response.status_code == 200 and attraction_response.status_code == 200:    flight_data = flight_response.json()    hotel_data = hotel_response.json()    attraction_data = attraction_response.json()    # 这里可以进行数据整合和处理，例如将相关信息组合成旅游行程推荐else:    print("获取数据失败，请检查 API 请求")

import requestsimport json# 支付宝沙箱环境的支付 API 地址pay_api_url = "https://openapi.alipaydev.com/gateway.do"# 构造支付请求参数params = {    "app_id": "your_app_id",    "method": "alipay.trade.page.pay",    "format": "JSON",    "charset": "UTF-8",    "sign_type": "RSA2",    # 其他必要参数，如订单金额、订单号等    "total_amount": "10.00",    "out_trade_no": "202301010001",    "product_code": "FAST_INSTANT_TRADE_PAY",    "notify_url": "https://example.com/notify",    "return_url": "https://example.com/return"}# 计算签名（这里省略实际的签名计算过程，实际开发中需要根据支付宝的签名规则进行计算）# sign = calculate_sign(params)# params["sign"] = signresponse = requests.post(pay_api_url, data=params)if response.status_code == 200:    result = json.loads(response.text)    if result.get("alipay_trade_page_pay_response").get("code") == "10000":        # 支付请求成功，处理后续逻辑        print("支付请求成功，可跳转到支付页面")    else:        print("支付请求失败，原因：", result.get("alipay_trade_page_pay_response").get("msg"))else:    print("请求失败，状态码：", response.status_code)

# 假设物流公司提供的 API 用于查询物流信息logistics_api_url = "https://example.com/api/logistics"# 订单号order_number = "202301010001"params = {    "order_number": order_number}response = requests.get(logistics_api_url, params=params)if response.status_code == 200:    logistics_data = response.json()    print("物流信息：", logistics_data)else:    print("获取物流信息失败，状态码：", response.status_code)

import org.springframework.beans.factory.annotation.Autowired;import org.springframework.http.ResponseEntity;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.client.RestTemplate;@RestControllerpublic class OrderController {    @Autowired    private RestTemplate restTemplate;    @GetMapping("/order/{productId}/stock")    public int checkStock(@PathVariable Long productId) {        String inventoryServiceUrl = "http://inventory-service/api/inventory/{productId}";        ResponseEntity<Integer> response = restTemplate.getForEntity(inventoryServiceUrl, Integer.class, productId);        if (response.getStatusCode().is2xxSuccessful()) {            return response.getBody();        } else {            // 处理错误情况            throw new RuntimeException("获取库存信息失败");        }    }}

const express = require('express');const app = express();const port = 3000;// 模拟数据const data = [    { id: 1, name: "Item 1" },    { id: 2, name: "Item 2" }];// 获取所有数据的 API 接口app.get('/api/data', (req, res) => {    res.json(data);});// 根据 ID 获取单个数据的 API 接口app.get('/api/data/:id', (req, res) => {    const item = data.find(item => item.id === parseInt(req.params.id));    if (item) {        res.json(item);    } else {        res.status(404).send("未找到对应数据");    }});app.listen(port, () => {    console.log(`API 服务运行在端口 ${port}`);});

import requestsapi_key = "your_api_key"headers = {    "Authorization": f"Bearer {api_key}"}url = "https://example.com/api/protected"response = requests.get(url, headers=headers)if response.status_code == 200:    data = response.json()    print(data)else:    print("请求失败，状态码：", response.status_code)