Google drive java从控制台获取信息

要从Google Drive API的Java控制台获取信息，您需要按照以下步骤操作：

1. 创建Google Cloud项目

打开 Google Cloud Console。
创建一个新项目或选择一个现有项目。
在左侧菜单中，点击“API和服务” > “库”。
搜索“Google Drive API”，选择它，然后点击“启用”。

2. 创建OAuth 2.0客户端ID

在左侧菜单中，点击“API和服务” > “凭据”。
点击“创建凭据”，选择“OAuth 2.0 客户端 ID”。
选择应用类型，例如“桌面应用程序”，然后点击“创建”。
下载生成的JSON文件，并将其保存到安全的位置。

3. 安装Google API客户端库

在您的Java项目中，使用Maven或Gradle安装Google API客户端库。

使用Maven

在pom.xml文件中添加以下依赖项：

<dependency>
  <groupId>com.google.api-client</groupId>
  <artifactId>google-api-client</artifactId>
  **version>1.23.0</version>
</dependency>
<dependency>
  <groupId>com.google.oauth-client</groupId>
  <artifactId>google-oauth-client-jetty</artifact|ersion>1.23.0</artifactId>
</dependency>
<dependency>
  <groupId>com.google.apis</groupId>
  <artifactId>google-api-services-drive</artifactId>
  <version>v3-rev20200615-1.23.0</version>
</dependency>

使用Gradle

在build.gradle文件中添加以下依赖项：

implementation 'com.google.api-client:google-api-client:1.23.0'
implementation 'com.google.oauth-client:google-oauth-client-jetty:1.23.0'
implementation 'com.google.apis:google-api-services-drive:v3-rev20200615-1.23.0'

4. 编写Java代码

创建一个Java类，例如DriveApiExample.java，并编写以下代码：

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
import com.google.api.services.drive.model.FileList;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.GeneralSecurityException;
import java.util.Collections;
import java.util.List;

public class DriveApiExample {

    private static final String APPLICATION_NAME = "Google Drive API Java Quickstart";
    private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();
    private static final String TOKENS_DIRECTORY_PATH = "tokens";

    /**
     * Global instance of the scopes required by this quickstart.
     * If modifying these scopes, delete your previously saved tokens/ folder.
     */
    private static final List<String> SCOPES = Collections.singletonList(DriveScopes.DRIVE_READONLY);
    private static final String CREDENTIALS_FILE_PATH = "/path/to/credentials.json";

    public static void main(String[] args) throws IOException, GeneralSecurityException {
        // Build a new authorized API client service.
        Drive service = new Drive.Builder(
                GoogleNetHttpTransport.newTrustedTransport(),
                JSON_FACTORY,
                new AuthorizationCodeInstalledApp(
                        new GoogleAuthorizationCodeFlow.Builder(
                                GoogleNetHttpTransport.newTrustedTransport(),
                                JSON_FACTORY,
                                CREDENTIALS_FILE_PATH,
                                SCOPES)
                                .setDataStoreFactory(new FileDataStoreFactory(new java.io.File(TOKENS_DIRECTORY_PATH)))
                                .setAccessType("offline")
                                .build(),
                        new LocalServerReceiver.Builder().setPort(8888).build())
                .setApplicationName(APPLICATION_NAME)
                .build());

        // Print the names and IDs for up to 10 files.
        FileList result = service.files().list()
                .setPageSize(10)
                .setFields("nextPageToken, files(id, name)")
                .execute();
        List<File> files = result.getFiles();
        if (files == null || files.isEmpty()) {
            System.out.println("No files found.");
        } else {
            System.out.println("Files:");
            for (File file : files) {
                System.out.printf("Found file: %s (%s)
", file.getName(), file.getId());
            }
        }
    }
}