springboot中怎么利用WebClient调用HTTP服务

这期内容当中小编将会给大家带来有关springboot中怎么利用WebClient调用HTTP服务，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。

在Spring Boot应用中

1.添加Spring WebFlux依赖

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

2.使用

（1）Restful接口demoController.java

package com.example.demo.controller;import com.example.demo.domain.MyData;import org.springframework.http.HttpHeaders;import org.springframework.http.MediaType;import org.springframework.web.bind.annotation.*;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServletRequest;@RestController@RequestMapping("/api")public class demoController {  @GetMapping(value = "/getHeader", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE})  public MyData getHeader(HttpServletRequest request) {    int id = 0;    if (request.getParameter("id") != null) {      id = Integer.valueOf(request.getParameter("id"));    }    String name = request.getParameter("name");    //header    String userAgent = "USER_AGENT——" + request.getHeader(HttpHeaders.USER_AGENT);    userAgent += " | ACCEPT_CHARSET——" + request.getHeader(HttpHeaders.ACCEPT_CHARSET);    userAgent += " | ACCEPT_ENCODING——" + request.getHeader(HttpHeaders.ACCEPT_ENCODING);    userAgent += " | ContextPath——" + request.getContextPath();    userAgent += " | AuthType——" + request.getAuthType();    userAgent += " | PathInfo——" + request.getPathInfo();    userAgent += " | Method——" + request.getMethod();    userAgent += " | QueryString——" + request.getQueryString();    Cookie[] cookies = request.getCookies();    if (cookies != null) {      for (Cookie cookie : cookies) {        System.out.println(cookie.getName() + "：" + cookie.getValue());      }    }    MyData data = new MyData();    data.setId(id);    data.setName(name);    data.setOther(userAgent);    return data;  }  @PostMapping(value = "/getPost", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE})  public MyData getPost(HttpServletRequest request) {    int id = 0;    if (request.getParameter("id") != null) {      id = Integer.valueOf(request.getParameter("id"));    }    String name = request.getParameter("name");    System.out.println(name + "," + id);    MyData data = new MyData();    data.setId(id);    data.setName(name);    return data;  }  /**   * POST传JSON请求   */  @PostMapping(value = "/getPostJson", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE})  public MyData getPostJson(@RequestBody(required = true) MyData data) {    System.out.println(data.getId());    System.out.println(data.getName());    return data;  }}

MyData.java

package com.example.demo.domain;public class MyData {  private int id;  private String name;  private String other;  public int getId() {    return id;  }  public void setId(int id) {    this.id = id;  }  public String getName() {    return name;  }  public void setName(String name) {    this.name = name;  }  public String getOther() {    return other;  }  public void setOther(String other) {    this.other = other;  }}

（2）WebClient使用

DemoApplicationTests.java

package com.example.demo;import com.example.demo.domain.MyData;import org.junit.Test;import org.springframework.http.HttpHeaders;import org.springframework.http.HttpMethod;import org.springframework.http.MediaType;import org.springframework.util.LinkedMultiValueMap;import org.springframework.util.MultiValueMap;import org.springframework.web.reactive.function.BodyInserters;import org.springframework.web.reactive.function.client.WebClient;import reactor.core.publisher.Mono;import java.time.Duration;import java.time.temporal.ChronoUnit;public class DemoApplicationTests {  private WebClient webClient = WebClient.builder()      .baseUrl("http://127.0.0.1:8080")      .defaultHeader(HttpHeaders.USER_AGENT, "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko)")      .defaultCookie("ACCESS_TOKEN", "test_token").build();  @Test  public void WebGetDemo() {    try {      Mono<MyData> resp = webClient.method(HttpMethod.GET).uri("api/getHeader?id={id}&name={name}", 123, "abc")          .retrieve()          .bodyToMono(MyData.class);      MyData data = resp.block();      System.out.println("WebGetDemo result----- " + data.getString());    } catch (Exception e) {      e.printStackTrace();    }  }  @Test  public void WebPostDemo() {    MultiValueMap<String, String> formData = new LinkedMultiValueMap<>(2);    formData.add("id", "456");    formData.add("name", "xyz");    Mono<MyData> response = webClient.method(HttpMethod.POST).uri("/api/getPost")        .contentType(MediaType.APPLICATION_FORM_URLENCODED)        .body(BodyInserters.fromFormData(formData))        .retrieve()        .bodyToMono(MyData.class).timeout(Duration.of(10, ChronoUnit.SECONDS));    System.out.println(response);    MyData data = response.block();    System.out.println("WebPostDemo result----- " + data.getString());  }  @Test  public void WebPostJson() {    MyData requestData = new MyData();    requestData.setId(789);    requestData.setName("lmn");    Mono<MyData> response = webClient.post().uri("/api/getPostJson")        .contentType(MediaType.APPLICATION_JSON_UTF8)        .syncBody(requestData)        .retrieve()        .bodyToMono(MyData.class).timeout(Duration.of(10, ChronoUnit.SECONDS));    MyData data = response.block();    System.out.println("WebPostJson result----- " + data.getString());  }}

上述就是小编为大家分享的springboot中怎么利用WebClient调用HTTP服务了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注亿速云行业资讯频道。