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java如何获取httpstatus

2026-03-21 02:36:52Java

获取 HTTP 状态码的方法

在 Java 中，可以通过多种方式获取 HTTP 请求的响应状态码，以下是常见的几种方法：

使用 HttpURLConnection

通过 HttpURLConnection 类可以获取 HTTP 响应状态码。示例代码如下：

import java.net.HttpURLConnection;
import java.net.URL;

public class HttpStatusExample {
    public static void main(String[] args) throws Exception {
        URL url = new URL("https://example.com");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");

        int statusCode = connection.getResponseCode();
        System.out.println("HTTP Status Code: " + statusCode);

        connection.disconnect();
    }
}

使用 Apache HttpClient

Apache HttpClient 是一个功能强大的 HTTP 客户端库，可以方便地获取状态码。示例代码如下：

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClients;

public class HttpClientExample {
    public static void main(String[] args) throws Exception {
        HttpClient client = HttpClients.createDefault();
        HttpGet request = new HttpGet("https://example.com");

        HttpResponse response = client.execute(request);
        int statusCode = response.getStatusLine().getStatusCode();
        System.out.println("HTTP Status Code: " + statusCode);
    }
}

使用 Spring RestTemplate

如果项目基于 Spring 框架，可以使用 RestTemplate 获取状态码。示例代码如下：

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

public class RestTemplateExample {
    public static void main(String[] args) {
        RestTemplate restTemplate = new RestTemplate();
        ResponseEntity<String> response = restTemplate.getForEntity("https://example.com", String.class);

        HttpStatus statusCode = response.getStatusCode();
        System.out.println("HTTP Status Code: " + statusCode.value());
    }
}

使用 OkHttp

OkHttp 是另一个流行的 HTTP 客户端库，可以轻松获取状态码。示例代码如下：

java如何获取httpstatus

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class OkHttpExample {
    public static void main(String[] args) throws Exception {
        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url("https://example.com")
                .build();

        Response response = client.newCall(request).execute();
        int statusCode = response.code();
        System.out.println("HTTP Status Code: " + statusCode);
    }
}