使用Java API的服务帐户验证Google API

import com.google.auth.oauth2.GoogleCredentials;
import com.google.auth.oauth2.ServiceAccountCredentials;
import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;

import java.io.FileInputStream;
import java.io.IOException;

public class GoogleApiExample {
    public static void main(String[] args) throws IOException {
        // 设置GOOGLE_APPLICATION_CREDENTIALS环境变量指向服务帐户密钥文件的路径
        System.setProperty("GOOGLE_APPLICATION_CREDENTIALS", "/path/to/your/service-account-key.json");

        // 创建服务帐户凭据
        GoogleCredentials credentials = ServiceAccountCredentials.fromStream(new FileInputStream("/path/to/your/service-account-key.json"));

        // 创建一个客户端对象
        Storage storage = StorageOptions.newBuilder().setCredentials(credentials).build().getService();

        // 使用客户端对象访问Google API
        for (Bucket bucket : storage.list().iterateAll()) {
            System.out.println(bucket.getName());
        }
    }
}