如何以编程方式删除Cloud Storage Bucket中文件夹中的所有内容

我通过从生产代码库中摘录来构造此样本。请注意setPrefix(folder)用于过滤存储桶中内容的用法。

因此，逻辑是从存储桶中获取所有内容，并根据文件夹名称进行过滤，然后将其删除。

import java.io.IOException;

import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.*;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;

import com.google.api.services.storage.Storage;
import com.google.api.services.storage.model.*;

public void deleteFolder(String bucketName, String folder) throws IOException {
    HttpTransport httpTransport = new NetHttpTransport();
    JsonFactory jsonFactory = new JacksonFactory();
    GoogleCredential.Builder credentialBuilder = new GoogleCredential.Builder();
    final GoogleCredential credential = credentialBuilder
            .setTransport(httpTransport).setJsonFactory(jsonFactory)
            .setServiceAccountId("YourServiceAccountId")
            // .setServiceAccountPrivateKeyFromP12File(new File("PrivateKeyFile"))
            .build();
    Storage storage = new Storage(httpTransport, jsonFactory,
        new HttpRequestInitializer() {
            public void initialize(HttpRequest request)
                    throws IOException {
                credential.initialize(request);
            }
        });
    // PLEASE NOTE THE USAGE OF setPrefix(folder) TO FILTER ITEMS IN FOLDER
    Objects objectsInFolder = storage.objects().list(bucketName).setPrefix(folder).execute();
    for(StorageObject object : objectsInFolder.getItems()) {
        storage.objects().delete(bucketName, object.getName()).execute();
    }
}