非浏览器应用程序是否可以使用OAuth应用程序代码授权类型？

非浏览器应用程序可以使用OAuth的应用程序代码授权类型，但需要使用授权的代码来获取访问令牌，而不是直接重定向到授权服务器。以下是使用Java实现的示例代码：

import okhttp3.*;
import org.json.*;

import java.io.IOException;

public class Main {
  public static void main(String[] args) {
    String clientId = "your_client_id";
    String clientSecret = "your_client_secret";
    String authorizationCode = "authorization_code_obtained_from_user";
    String redirectUri = "your_redirect_uri";
    
    OkHttpClient client = new OkHttpClient();

    RequestBody requestBody = new FormBody.Builder()
        .add("grant_type", "authorization_code")
        .add("client_id", clientId)
        .add("client_secret", clientSecret)
        .add("code", authorizationCode)
        .add("redirect_uri", redirectUri)
        .build();

    Request request = new Request.Builder()
        .url("https://oauth2.example.com/token")
        .post(requestBody)
        .build();

    try (Response response = client.newCall(request).execute()) {
      String responseBody = response.body().string();
      JSONObject jsonObject = new JSONObject(responseBody);

      String accessToken = jsonObject.getString("access_token");
      int expiresIn = jsonObject.getInt("expires_in");
      String refreshToken = jsonObject.getString("refresh_token");

      System.out.println("Access Token: " + accessToken);
      System.out.println("Expires in: " + expiresIn + " seconds");
      System.out.println("Refresh Token: " + refreshToken);
    } catch(IOException | JSONException e) {
      e.printStackTrace();
    }
  }
}