学习建网站家装设计方案ppt案例

远程调用

API/SDK的区别：

1.WebClient

1.1创建与调用

创建WebClient非常简单：

• webclientcreate0
• webclient.create(string baseurl)

还可以使用webclient.builder0 配置更多参数项：

• uribuilderfactory: 自定义uribuilderfactory, 定义baseurl.
• defaulturivariables:默认uril变量。
• defaultheader:每个请求默认头
• defaultcookie:每个请求默认 cookie.
• defaultrequest:consumer 自定义每个请求
• filter:过滤client发送的每个请求
• exchangestrategies:http 消息 reader/writer 自元 er 自定义。
• clientconnector:http client库设置。

定义Weather服务类，定义weather方法

post请求需要定义body 根据不同的接口定义各自的请求参数以及请求头header

public Mono<String> weather(String city){//远程调用api//创建webclientString baseurl = "http://apis.juhe.cn/simpleWeather/query?";WebClient client = WebClient.create();//定义发请求方式Map<String,String>map=new HashMap<>();map.put("city",city);Mono<String> mono = client.post().uri("http://apis.juhe.cn/simpleWeather/query?key=251518e073ef6c3c9504dd286c3f6a86&city={city}", map).contentType(MediaType.APPLICATION_JSON)//定义响应内容类型.header("User-Agent", "ikun").retrieve().bodyToMono(String.class);return mono;
}

在Controller类中返回数据

//调用外部api获取天气
@GetMapping("weather")
public Mono<String> weather(@RequestParam(value = "city") String city){Mono<String> weather = weatherService.weather(city);return weather;
}

2.HTTP Interface

2.1导入依赖

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-webflux</artifactId>
</dependency>

2.2定义接口

public interface WeatherInterface {@GetExchange(url = "/query",accept = "application/json")public Mono<String> getweather(@RequestParam("city") String city,@RequestParam String key);
}

public Mono<String> weather2(String city){//创建客户端WebClient client = WebClient.builder().baseUrl("http://apis.juhe.cn/simpleWeather").codecs(clientCodecConfigurer -> {clientCodecConfigurer.defaultCodecs().maxInMemorySize(256*1024*1024);}).build();//创建工厂HttpServiceProxyFactory factory = HttpServiceProxyFactory.builder(WebClientAdapter.forClient(client)).build();//获取代理对象WeatherInterface weatherapi = factory.createClient(WeatherInterface.class);Mono<String> getweather = weatherapi.getweather(city,"251518e073ef6c3c9504dd286c3f6a86");return getweather;}

从配置文件中取值 ${key}

2.3封装接口配置

@Configuration
public class WebApiConfig {@BeanHttpServiceProxyFactory httpServiceProxyFactory(){//创建客户端WebClient client = WebClient.builder().baseUrl("http://apis.juhe.cn").defaultHeader("user-agent","ikun") //定义默认请求头.codecs(clientCodecConfigurer -> {clientCodecConfigurer.defaultCodecs().maxInMemorySize(256*1024*1024);}).build();//创建工厂HttpServiceProxyFactory factory = HttpServiceProxyFactory.builder(WebClientAdapter.forClient(client)).build();return factory;}@BeanWeatherInterface weatherInterface(){WeatherInterface weatherInterface = httpServiceProxyFactory().createClient(WeatherInterface.class);return weatherInterface;}}

weatherservice里可以自动装配WeatherInterface调用

@Autowired
private WeatherInterface weatherInterface;public Mono<String> weather2(String city, @Value("${apikey}")String key){Mono<String> getweather = weatherInterface.getweather(city,key);return getweather;}