<dependency>
    <groupId>com.microsoft.graph</groupId>
    <artifactId>microsoft-graph</artifactId>
    <version>5.0.0</version>
</dependency>
<dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-identity</artifactId>
    <version>1.2.5</version>
</dependency>

import com.microsoft.graph.models.Event;
import com.microsoft.graph.models.User;
import com.microsoft.graph.requests.EventCollectionPage;
import com.microsoft.graph.requests.GraphServiceClient;
import okhttp3.Request;

import com.azure.identity.ClientSecretCredential;
import com.azure.identity.ClientSecretCredentialBuilder;

import java.util.List;

public class OutlookCalendarReader {

    private static final String CLIENT_ID = "your-client-id";
    private static final String CLIENT_SECRET = "your-client-secret";
    private static final String TENANT_ID = "your-tenant-id";
    private static final String USER_EMAIL = "user@outlook.com";

    public static void main(String[] args) {
        // 创建认证凭证
        ClientSecretCredential credential = new ClientSecretCredentialBuilder()
                .clientId(CLIENT_ID)
                .clientSecret(CLIENT_SECRET)
                .tenantId(TENANT_ID)
                .build();

        // 创建Graph客户端
        GraphServiceClient<Request> graphClient = GraphServiceClient
                .builder()
                .authenticationProvider(request -> {
                    String token = credential.getToken(
                            new TokenRequestContext()
                                    .addScopes("https://graph.microsoft.com/.default"))
                            .block().getToken();
                    request.addHeader("Authorization", "Bearer " + token);
                })
                .buildClient();

        // 获取用户日历事件
        try {
            EventCollectionPage events = graphClient.users(USER_EMAIL)
                    .events()
                    .buildRequest()
                    .select("subject,start,end,location")
                    .top(100)
                    .get();

            List<Event> eventList = events.getCurrentPage();
            
            System.out.println("Calendar Events:");
            for (Event event : eventList) {
                System.out.println("Subject: " + event.subject);
                System.out.println("Start: " + event.start.dateTime);
                System.out.println("End: " + event.end.dateTime);
                System.out.println("Location: " + event.location);
                System.out.println("----------------------");
            }
        } catch (Exception e) {
            System.err.println("Error retrieving calendar events: " + e.getMessage());
            e.printStackTrace();
        }
    }
}