如何使用Java进行HTTP请求并处理响应错误-蒲公英云

如何使用Java进行HTTP请求并处理响应错误

原创青旅半醒 2024-11-26 07:18 188阅读 0赞

在Java中，我们可以使用HttpURLConnection或者HttpClient来发送HTTP请求。下面是一个使用HttpURLConnection的例子：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class Main {
    public static void main(String[] args) {
        // 创建URL对象
        URL url = new URL("http://example.com");
        // 创建连接
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        // 设置请求方法（GET或POST等）
        connection.setRequestMethod("GET");
        // 获取响应状态码
        int responseCode = connection.getResponseCode();
        System.out.println("Response Code: " + responseCode);
        // 处理响应数据
        if (responseCode == 200) {
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()))));
            String inputLine;
            StringBuffer content = new StringBuffer();
            while ((inputLine = in.readLine()) != null)) {
                content.append(inputLine);
            }
            in.close();
            System.out.println("Response Content: " + content.toString());
        } else {
            System.out.println("Failed to retrieve data. Response Code: " + responseCode);
        }
    }
}