javaCopy codeimport java.net.HttpURLConnection;
import java.net.URL;
public class HttpRequestExample {
    public static void main(String[] args) {
        String invalidMethodName = "GET@";
        
        try {
            // 創(chuàng)建URL對(duì)象
            URL url = new URL("https://www.example.com");
            // 打開(kāi)HTTP連接
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            
            // 設(shè)置請(qǐng)求方法
            connection.setRequestMethod(invalidMethodName); // 使用非法字符的方法名
            // 發(fā)送請(qǐng)求并獲取響應(yīng)碼
            int responseCode = connection.getResponseCode();
            System.out.println("Response Code: " + responseCode);
            
            // 關(guān)閉連接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

javaCopy codeimport java.net.HttpURLConnection;
import java.net.URL;
public class HttpRequestExample {
    public static void main(String[] args) {
        String validMethodName = "GET";
        
        try {
            // 創(chuàng)建URL對(duì)象
            URL url = new URL("https://www.example.com");
            // 打開(kāi)HTTP連接
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            
            // 設(shè)置請(qǐng)求方法
            connection.setRequestMethod(validMethodName); // 使用合法的方法名
            // 發(fā)送請(qǐng)求并獲取響應(yīng)碼
            int responseCode = connection.getResponseCode();
            System.out.println("Response Code: " + responseCode);
            
            // 關(guān)閉連接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

javaCopy codeimport java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class HttpPostExample {
    public static void main(String[] args) {
        try {
            // 創(chuàng)建URL對(duì)象
            URL url = new URL("https://www.example.com/api/data");
            // 打開(kāi)HTTP連接
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            
            // 設(shè)置請(qǐng)求方法為POST
            connection.setRequestMethod("POST");
            // 設(shè)置請(qǐng)求頭部信息
            connection.setRequestProperty("Content-Type", "application/json");
            connection.setRequestProperty("Accept", "application/json");
            
            // 設(shè)置請(qǐng)求體數(shù)據(jù)
            String jsonData = "{\"name\":\"John\",\"age\":30}";
            connection.setDoOutput(true);
            OutputStream outputStream = connection.getOutputStream();
            outputStream.write(jsonData.getBytes());
            outputStream.flush();
            outputStream.close();
            
            // 發(fā)送請(qǐng)求并獲取響應(yīng)碼
            int responseCode = connection.getResponseCode();
            System.out.println("Response Code: " + responseCode);
            
            // 關(guān)閉連接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}