从另一个URL获取数据- Java Spring

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

public class DataFetcher {
    public static void main(String[] args) {
        RestTemplate restTemplate = new RestTemplate();
        String url = "http://example.com/api/data"; // 替换为实际的URL地址
        ResponseEntity<String> response = restTemplate.getForEntity(url, String.class);
        String data = response.getBody();
        System.out.println(data);
    }
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class DataFetcher {
    public static void main(String[] args) throws IOException {
        String url = "http://example.com/api/data"; // 替换为实际的URL地址
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
        connection.setRequestMethod("GET");
        int responseCode = connection.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();
            System.out.println(response.toString());
        } else {
            System.out.println("HTTP request failed with response code: " + responseCode);
        }
    }
}