Java 17? ??? ?? ??? ??? ????? ?? ? ??????? ???? ????? ???? ??? ???. ?? ?? ?? ? ??? ?? HttpURLConnection ?? Apache HttpClient? ?? ?? ?????? ?? ??? ? ??? ??? WebClient ??????. ? ?????? WebClient? ??? ??, WebClient? Java?? HTTP ??? ????? ??, ?????? WebClient? ????? ??? ? ?? ??? ???????.

? ?????????

WebClient? Spring WebFlux ??? ????? HTTP ??? ???? ?? ????? ??? ?? ????. ?? ?? ??? ???? WebClient? ??? ?????.

• ??? ??: ??? I/O ??? ?? ??? ?? ???? ??????? ???? ?????.
• ???: API? ???? ?? ?? ??? ??? ?????.
• ???: ?? ???? ??? ???? WebClient? ? ?? ??? ????? ??? ? ????.
• ?? ??? ??: ?? ??, ?? ? ?? ??? ?? ??? ? ????.

?????? ??

Java 17?? WebClient? ????? ?? ????? ???? ?????.

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

???? ??? ??? ?? WebClient ????? ????? ?? ?????.

import org.springframework.web.reactive.function.client.WebClient;

public class WebClientExample {
    private final WebClient webClient;

    public WebClientExample() {
        this.webClient = WebClient.builder()
                                  .baseUrl("https://jsonplaceholder.typicode.com")
                                  .build();
    }

    public String getPosts() {
        return webClient.get()
                        .uri("/posts")
                        .retrieve()
                        .bodyToMono(String.class)
                        .block(); // Blocks the call for simplicity in this example
    }
}

? ???? ?? WebClient ????? ???? ?? ?? URL? ??? ?? GET ??? ???? JSON ?? ??? API?? ??? ??? ?????. block() ???? ????? ??? ???? ? ?????.

??? ????

WebClient? ??? ??? ??? ??? ?? ??? ? ?? ??? ????. ??? ???? ?? ?? ???? ???? ??? ??? ? ??? ??? ? ????.

import reactor.core.publisher.Mono;

public Mono<String> getPostsAsync() {
    return webClient.get()
                    .uri("/posts")
                    .retrieve()
                    .bodyToMono(String.class); // Non-blocking call
}

bodyToMono()?? ??? Mono? ?? ??????? ??? ? ???? ??? ?????? ????? ??? ? ????. ?? ???? ???? ?? ?? ?? ?? ??? ???? ?? ??????? ?? ?????.

?? ??

WebClient? ?? ??? ???? onStatus() ???? ???? ??? ? ????.

public String getPostWithErrorHandling() {
    return webClient.get()
                    .uri("/posts/9999") // Assuming this post does not exist
                    .retrieve()
                    .onStatus(status -> status.is4xxClientError(), clientResponse -> {
                        System.err.println("Client Error!");
                        return Mono.error(new RuntimeException("Client error occurred"));
                    })
                    .onStatus(status -> status.is5xxServerError(), clientResponse -> {
                        System.err.println("Server Error!");
                        return Mono.error(new RuntimeException("Server error occurred"));
                    })
                    .bodyToMono(String.class)
                    .block();
}

? ???? 4xx ????? ??? 5xx ?? ??? ?? ???? ?????.

Java 17? ??? ??? ???? ?????? WebClient? ???? HTTP ??? ?? ???? ? ????. ??? ??? ?? ???? ???? ??? ???? ???? WebClient? Java ??????? ?? ?????? ???? ?????. ?? ??? ?? ? ??????? ??? ? ????? ?? ?? ??? ? ??? ?????.

WebClient? ?? ?? ??? Java 17? ?? ???? ??? ?? ? ?? ???? ??? ???!

? ??? Java? WebClient ?? HTTP ??? ???? ???? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!