使用Java 11中的HttpClient发送HTTP请求并处理响应

标题：使用Java 11中的HttpClient发送HTTP请求并处理响应

引言：在现代的互联网应用程序中，与其他服务器进行HTTP通信是非常常见的任务。Java提供了一些内置的工具，可以帮助我们实现这一目标，其中最新且推荐使用的是Java 11中引入的HttpClient类。本文将介绍如何使用Java 11中的HttpClient发送HTTP请求并处理响应，帮助读者更好地理解和掌握这个强大的工具。

import java.net.http.HttpClient;

public class Main {
public static void main(String[] args) {
HttpClient httpClient = HttpClient.newHttpClient();

// TODO: 发送HTTP请求并处理响应
}
}

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import java.net.URI;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpHeaders;

public class Main {
public static void main(String[] args) {
HttpClient httpClient = HttpClient.newHttpClient();

HttpRequest httpRequest = HttpRequest.newBuilder()
.uri(URI.create("http://api.example.com/data"))
.GET()
.build();

try {
HttpResponse httpResponse = httpClient.send(httpRequest, HttpResponse.BodyHandlers.ofString());

int statusCode = httpResponse.statusCode();
HttpHeaders headers = httpResponse.headers();
String body = httpResponse.body();

System.out.println("Response Code: " + statusCode);
System.out.println("Response Headers: " + headers);
System.out.println("Response Body: " + body);
} catch (Exception e) {
e.printStackTrace();
}
}
}

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import java.net.URI;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpHeaders;
import java.net.http.HttpRequest.BodyPublishers;

public class Main {
public static void main(String[] args) {
HttpClient httpClient = HttpClient.newHttpClient();

String requestBody = "username=admin&password=123456";

HttpRequest httpRequest = HttpRequest.newBuilder()
.uri(URI.create("http://api.example.com/login"))
.header("Content-Type", "application/x-www-form-urlencoded")
.POST(BodyPublishers.ofString(requestBody))
.build();

try {
HttpResponse httpResponse = httpClient.send(httpRequest, HttpResponse.BodyHandlers.ofString());

int statusCode = httpResponse.statusCode();
HttpHeaders headers = httpResponse.headers();
String body = httpResponse.body();

System.out.println("Response Code: " + statusCode);
System.out.println("Response Headers: " + headers);
System.out.println("Response Body: " + body);
} catch (Exception e) {
e.printStackTrace();
}
}
}

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结论：本文介绍了如何使用Java 11中的HttpClient类发送HTTP请求并处理响应。通过示例代码，我们可以看到HttpClient类提供了非常简洁和方便的API来实现与其他服务器的通信。读者们可以根据自己的具体需求，结合HttpClient类的其他功能来实现更复杂的HTTP请求和响应处理。希望本文能够帮助读者更好地学习和应用Java 11中的HttpClient类。

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