spring 5 webclient使用指南

淩亂°似流年 2022-01-15 12:29 367阅读 0赞

WebClient是从Spring WebFlux 5.0版本开始提供的一个非阻塞的基于响应式编程的进行Http请求的客户端工具。它的响应式编程的基于Reactor的。WebClient中提供了标准Http请求方式对应的get、post、put、delete等方法，可以用来发起相应的请求。

下面是链接是讲解webclient的使用指南，推荐一下，感兴趣的可以学习一下。很强大，示例代码如下：

package com.example.demo.controller;
    
    import org.springframework.core.io.Resource;
    import org.springframework.http.MediaType;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.reactive.function.client.WebClient;
    import reactor.core.publisher.Mono;
    
    import javax.imageio.ImageIO;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.IOException;
    
    
    @RestController
    public class DemoController {
    
    
        //获取字符串类型数据
        @RequestMapping("/test")
        public String hello() {
            Mono<String> mono = WebClient.create()
                    .get()
                    .uri("https://www.baidu.com")
                    .retrieve()
                    .bodyToMono(String.class);
            mono.subscribe(System.out::println);
            return mono.block();
        }
    
        //下载图片
        @RequestMapping("/image")
        public String image() throws IOException {
            Mono<Resource> mono = WebClient.create()
                    .get()
                    .uri("https://avatar.csdnimg.cn/4/0/9/1_iteye_13139.jpg")
                    .accept(MediaType.IMAGE_JPEG)
                    .retrieve()
                    .bodyToMono(Resource.class);
            mono.subscribe(System.out::println);
            Resource resource = mono.block();
            BufferedImage bufferedImage = ImageIO.read(resource.getInputStream());
            ImageIO.write(bufferedImage, "jpg", new File("D:/test.jpg"));
            return "SUCCESS";
        }
    }

[ spring 5 webclient使用指南][spring 5 webclient]

[spring 5 webclient]: https://www.jianshu.com/p/faeb540f30ce