Java网络编程HTTP客户端请求失败案例-蒲公英云

Java网络编程HTTP客户端请求失败案例

原创 Myth丶恋晨 2024-09-24 08:30 162阅读 0赞

在Java的网络编程中，HTTP客户端请求通常会通过HttpURLConnection或者HttpClient来实现。以下是一个简单的HTTP客户端请求失败的例子：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class HttpFailureExample {
    public static void main(String[] args) {
        // 创建URL对象
        URL url = new URL("http://example.com/invalid-page"); // 这个例子中的页面不存在
        try (HttpURLConnection connection = (HttpURLConnection) url.openConnection()) {
            // 如果请求失败（例如404错误），connection.getcode()会返回一个非200的值
            int responseCode = connection.getResponseCode();
            if (responseCode != 200) { // 请求失败，打印状态码和错误信息
                System.out.println("HTTP Request Failed. Response Code: " + responseCode);
                BufferedReader in = new BufferedReader(new InputStreamReader(connection.getErrorStream())));
                String inputLine;
                StringBuffer outputBuffer = new StringBuffer();
                while ((inputLine = in.readLine()) != null) {
                    outputBuffer.append(inputLine);
                }
                System.out.println("Error Details:\n" + outputBuffer.toString());
            }
        } catch (Exception e) {
            System.out.println("An Error Occurred: " + e.getMessage());
            e.printStackTrace();
        }
    }
}