从基于控制台的Java应用程序调用MS Graph API时获取Http代码400，以读取存储在onedrive中的excel文件

如何解决从基于控制台的Java应用程序调用MS Graph API时获取Http代码400，以读取存储在onedrive中的excel文件

我正在尝试通过Microsoft graph API读取存储在onedrive中的Excel文件。为此，在此基于控制台的应用程序中，我提供了我的租户ID，客户端机密和客户端ID，这些ID是通过Microsoft azure控制台生成的。通过api后，我将这些信息与身份验证URL一起传递，但是每当我运行代码时，我都会得到状态码400这意味着错误的请求。为什么返回400状态代码？我的方法有任何错误吗？

代码：

Authenticator.java

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

import com.google.gson.GsonBuilder;
import com.google.gson.JsonObject;
import com.microsoft.graph.authentication.IAuthenticationProvider;
import com.microsoft.graph.http.IHttpRequest;

public class Authenticator {
    
    public final static String clientId = "XXXXXXXXXXXX";
    public final static String clientSecret = "XXXXXXXXXXXXXX";
    public final static String tenant = "XXXXXXXXXXXXXX";
    
    
    
    private String grantType = "client_credentials";
    private String tokenEndpoint = "https://login.microsoftonline.com/" +tenant + "/oauth2/v2.0/token";
    private String scope = "https%3A%2F%2Fgraph.microsoft.com%2F.default";
    private String accessToken = null;

    protected IAuthenticationProvider authenticationProvider = null;

    public Authenticator() { }
    
    public IAuthenticationProvider getAuthenticationProvider()
    {
        if (authenticationProvider == null) {
            try {
                System.out.println(accessToken);
                accessToken = getAccessToken().replace("\"","");
                System.out.println(accessToken);
                authenticationProvider = new IAuthenticationProvider() {
                    public void authenticateRequest(final IHttpRequest request) {
                        request.addHeader("Authorization","Bearer " + accessToken);
                    }
                };

            }
            catch (Exception e)
            {
                throw new Error("Could not create authentication provider: " + e.getLocalizedMessage());
            }
        }
        return authenticationProvider;
    }
    
    private String getAccessToken()
    {
        try {
            URL url = new URL(tokenEndpoint);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            String line;
            StringBuilder jsonString = new StringBuilder();

            conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setInstanceFollowRedirects(false);
            conn.connect();
            String secret = clientSecret.replace("+","%2B").replace("=","%3D").replace("/","%2F");
            
            OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream(),"UTF-8");
            String payload = String.format("grant_type=%1$s&scope=%2$s&client_id=%3$s&client_secret=%4$s",grantType,scope,clientId,secret);
            writer.write(payload);
            writer.close();
            try {
                BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                while((line = br.readLine()) != null){
                    jsonString.append(line);
                }
                br.close();
            } catch (Exception e) {
                e.printStackTrace();
                throw new Error("Error reading authorization response: " + e.getLocalizedMessage());
            }
            conn.disconnect();

            JsonObject res = new GsonBuilder().create().fromJson(jsonString.toString(),JsonObject.class);
            return res.get("access_token").toString().replaceAll("\"","");

        } catch (Exception e) {
            throw new Error("Error retrieving access token: " + e.getLocalizedMessage());
        }
    }

}

ReadExcel.java

import com.microsoft.graph.authentication.IAuthenticationProvider;
import com.microsoft.graph.models.extensions.IGraphServiceClient;
import com.microsoft.graph.models.extensions.WorkbookRange;
import com.microsoft.graph.requests.extensions.GraphServiceClient;

public class ReadExcel {
    
    public static IGraphServiceClient graphClient;

    public static void main(String[] args) {
        
        Authenticator authenticator = new Authenticator();
        IAuthenticationProvider authenticationProvider = authenticator
                .getAuthenticationProvider();
       
        
        IGraphServiceClient graphClient = GraphServiceClient.builder().authenticationProvider( authenticationProvider ).buildClient();

        WorkbookRange workbookRange = graphClient.me().drive().items("XXXXXXXXXX").workbook().worksheets("Sheet1")
            .range("A1:B2")
            .buildRequest()
            .get();
        

    }

}

错误： java.io.IOException：服务器返回URL的https://login.microsoftonline.com/f8cdef31-a31e-4b4a-93e4-5f571e91255a/oauth2/v2.0/token的HTTP响应代码：400

用于验证图形api的示例代码将受到高度赞赏。预先感谢。

Update-1：

更新了代码，并将“ oauth2-oidc-sdk”用于身份验证。如Micrsoft Graph教程示例代码中所述更新了我的代码。
Github链接：https://github.com/microsoftgraph/console-java-connect-sample

但是出现此错误-

{“错误”：“ invalid_grant”，“错误说明”：“ AADSTS9002313：请求无效。请求格式错误或无效。\ r \ n跟踪ID：c77ba129-89ec-4869-993d​​-55475fab4800 \ r \ n相关ID：34ce3c6b -b125-4c24-b57f-9716f320462c \ r \ n时间戳：2020-09-16 06：18：36Z“，”错误代码“：[9002313]，”时间戳“：” 2020-09-16 06：18：36Z“， “ trace_id”：“ c77ba129-89ec-4869-993d​​-55475fab4800”，“ correlation_id”：“ 34ce3c6b-b125-4c24-b57f-9716f320462c”，“ error_uri”：“ https://login.microsoftonline.com/error?code = 9002313“}