public interface TenantClient {

  @GetExchange("/tenants")
  Flux<User> getAll();
}

@Autowired
TenantClient tenantClient;

tenantClient.getAll().subscribe(

);

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

<!-- For webclient support -->
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-webflux</artifactId>
</dependency>

@HttpExchange
public interface DemoApi {

    @GetExchange("/admin/tenant/list")
    String list();

@GetExchange:  for HTTP GET requests.
@PostExchange:  for HTTP POST requests.
@PutExchange: for HTTP PUT requests.
@DeleteExchange: for HTTP DELETE requests.
@PatchExchange:  for HTTP PATCH requests.

@PathVariable: 占位符參數(shù).
@RequestBody: 請求body.
@RequestParam: 請求參數(shù).
@RequestHeader: 請求頭.
@RequestPart: 表單請求.
@CookieValue: 請求cookie.

    @Bean
    DemoApi demoApi() {
        WebClient client = WebClient.builder().baseUrl("http://pigx.pigx.vip/").build();
        HttpServiceProxyFactory factory = HttpServiceProxyFactory.builder(WebClientAdapter.forClient(client)).build();
        return factory.createClient(DemoApi.class);
    }

@SpringBootTest
class DemoApplicationTests {
	@Autowired
	private DemoApi demoApi;

	@Test
	void testDemoApi() {
		demoApi.list();
	}
}