Java API Call: Invoke Third-Party APIs

2 years ago
Jackson Davis
2 minutes

One common way to invoke a third-party API in Java is by using network requests. Here is a basic method to achieve this.

  1. HTTP connection
  2. Http client
  3. According to the requirements of the third-party interface, configure the request method, header information, request body parameters, etc.
  4. Send a request and receive the response data.
  5. Analyze and process the response data, and take any necessary follow-up actions.

Below is a simple example code:

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

public class CallThirdPartyApi {
    public static void main(String[] args) {
        try {
            URL url = new URL("http://api.example.com/thirdparty/api");
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.setRequestProperty("Content-Type", "application/json");

            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String inputLine;
            StringBuffer response = new StringBuffer();

            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            in.close();

            System.out.println(response.toString());
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

This is just a simple example, in practice calling a third-party API may involve more complex logic, such as handling request parameters, setting request headers, processing response data, etc. Depending on the specific requirements of the third-party API, adjustments may need to be made in the code.

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