这篇文章主要介绍了spring boot使用WebClient调用HTTP服务代码示例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

WebClient的请求模式属于异步非阻塞，能够以少量固定的线程处理高并发的HTTP请求

WebClient是Spring WebFlux模块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，从Spring5.0开始提供

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;
  }
}