通过Java实现HTTP请求与响应示例-蒲公英云

通过Java实现HTTP请求与响应示例

在Java中，我们可以使用Apache HttpClient库来发送HTTP请求和接收响应。以下是一个简单的示例：

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.util.EntityUtils;
public class HttpExample {
    public static void main(String[] args) {
        // 创建一个HttpGet请求对象
        HttpGet httpget = new HttpGet("http://example.com");
        try (CloseableHttpResponse response =HttpClientBuilder.create().build().execute(httpget)) {
            // 获取响应状态码
            int status_code = response.getStatusLine().getStatusCode();
            // 如果是2xx的成功状态，就获取并打印实体数据
            if (status_code >= 200 && status_code < 300) {
                HttpEntity entity = response.getEntity();
                if (entity != null) {
                    String content = EntityUtils.toString(entity);
                    System.out.println("Response Content: " + content);
                }
            } else {
                System.out.println("Error occurred. Status code: " + status_code);
            }
        // 关闭响应
        response.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}