使用Microsoft Graph Java SDK遭遇ClassNotFoundException问题求助

问题根源 #

java.lang.ClassNotFoundException: com.azure.core.credential.TokenCredential 意味着项目类路径中缺少Azure Core库——该类是azure-identity的依赖项，可能因依赖传递失败、版本冲突或构建缓存问题未被正确引入。同时你使用的Graph SDK 5.x版本已弃用TokenCredentialAuthProvider，继续使用会引发兼容性问题。

修复步骤 #

1. 调整依赖配置 #

在build.gradle中显式添加与azure-identity 1.7.1兼容的azure-core依赖，确保依赖完整：

dependencies {
    implementation 'com.azure:azure-identity:1.7.1'
    implementation 'com.azure:azure-core:1.28.0'
    implementation 'com.microsoft.graph:microsoft-graph:5.42.0'
}

2. 更新代码适配Graph SDK 5.x #

Graph SDK 5.x使用AzureIdentityAuthenticationProvider替代旧的TokenCredentialAuthProvider，修改代码如下：

import com.azure.identity.ClientSecretCredential;
import com.azure.identity.ClientSecretCredentialBuilder;
import com.microsoft.graph.authentication.AzureIdentityAuthenticationProvider;
import com.microsoft.graph.graphserviceclient.GraphServiceClient;
import java.util.List;

public class GraphClientExample {
    public static void main(String[] args) {
        final ClientSecretCredential credential = new ClientSecretCredentialBuilder()
            .clientId("...")
            .clientSecret("...")
            .tenantId("...")
            .build();

        final AzureIdentityAuthenticationProvider authProvider = new AzureIdentityAuthenticationProvider(
            credential,
            List.of("files.readwrite.all")
        );

        final GraphServiceClient client = GraphServiceClient
            .builder()
            .authenticationProvider(authProvider)
            .buildClient();
    }
}

3. 清理并重新构建项目 #

执行以下命令清理缓存并重新拉取依赖：

./gradlew clean build --refresh-dependencies

内容的提问来源于stack exchange，提问作者kerelape