6.3 远程调用三方 API

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1、创建项目时需要选择 Spring Reactive Web

2、0元购买天气服务 API ，我这里买了是生产中没有购买的话会显示 购买

https://market.aliyun.com/apimarket/detail/cmapi010812?spm=5176.730005.result.4.2e3c35249rw86S

2、查看自己的 AppCode

https://market.console.aliyun.com/?spm=5176.28663977.aliyun_market_home_panel.4.6cf24d50it1sxH

3、编写代码实现功能

• WeatherController

package com.zhong.rpc.controller;

import com.zhong.rpc.service.WeatherService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import reactor.core.publisher.Mono;

/**
 * @ClassName : WeatherController
 * @Description : 天气查询
 * @Author : zhx
 * @Date: 2024-06-15 16:17
 */
@RestController
public class WeatherController {

    @Autowired
    WeatherService weatherService;

    @GetMapping("/weather")
    public Mono<String> weather(@RequestParam("city") String city) {
        // 查询天气
        return  weatherService.weather(city);
    }
}

• WeatherService

package com.zhong.rpc.service;

import org.springframework.http.MediaType;
import org.springframework.stereotype.Service;
import org.springframework.web.reactive.function.client.WebClient;
import reactor.core.publisher.Mono;

import java.util.HashMap;

/**
 * @ClassName : WeatherService
 * @Description :
 * @Author : zhx
 * @Date: 2024-06-15 16:19
 */
@Service
public class WeatherService {
    public Mono<String> weather(String city) {
        // 远程调用阿里云服务 API
        // 1、创建 WebClient

        WebClient webClient = WebClient.create();

        // 2、定义请求行为

        HashMap<String, String> params = new HashMap<>();
        params.put("area", city);

        return webClient.get()
                .uri("https://ali-weather.showapi.com/area-to-id?area={area}", params)
                .accept(MediaType.APPLICATION_NDJSON)   // 定义响应的内容类型
                .header("Authorization", "APPCODE ???") // 步骤 2 查看到的 AppCode 填充 ??? 号
                .retrieve()
                .bodyToMono(String.class);
    }
}

4、浏览器测试

http://localhost:8080/weather?city=内江