如何使用Google Drive API在Java中编写文件

时间:2015-07-18 17:21:40

标签: java google-drive-api

我试图在Google云端硬盘上写一个文件。

这是我的代码:

 /**
 * Update a permission's role.
 *
 * @param service Drive API service instance.
 * @param fileId ID of the file to update permission for.
 * @param permissionId ID of the permission to update.
 * @param newRole The value "owner", "writer" or "reader".
 * @return The updated permission if successful, {@code null} otherwise.
 */
private static Permission updatePermission(Drive service, String fileId,
        String permissionId, String newRole) {
    try {
        // First retrieve the permission from the API.
        Permission permission = service.permissions().get(
                fileId, permissionId).execute();
        permission.setRole(newRole);
        return service.permissions().update(
                fileId, permissionId, permission).execute();
    } catch (IOException e) {
        System.out.println("An error occurred: " + e);
    }
    return null;
}

public static void main(String[] args) throws IOException {

    // Build a new authorized API client service.
    Drive service = getDriveService();

    // File's metadata.
    File file = new File();
    file.setId(??);
    file.setTitle("Title");
    file.setDescription("Descrizione");
    file.setMimeType("application/vnd.google-apps.drive-sdk");

    updatePermission(service, file.getId(), ??, "writer");

    file = service.files().insert(file).execute();
}

就像你可以看到的那样,在Main I中设置文件属性。但我不知道怎么做。

1)什么是文件ID ?例如,file.setId("");如果我设置了" 1" gradle告诉我:

An error occurred: com.google.api.client.googleapis.json.GoogleJsonResponseException: 404 Not Found
{
  "code" : 404,
  "errors" : [ {
  "domain" : "global",
  "location" : "file",
  "locationType" : "other",
  "message" : "File not found: 1",
  "reason" : "notFound"
  } ],
  "message" : "File not found: 1"
}
Exception in thread "main"      com.google.api.client.googleapis.json.GoogleJsonResponseException: 403      Forbidden
{
    "code" : 403,
    "errors" : [ {
    "domain" : "global",
    "message" : "Insufficient Permission",
    "reason" : "insufficientPermissions"
    } ],
    "message" : "Insufficient Permission"
}
at com.google.api.client.googleapis.json.GoogleJsonResponseException.from(GoogleJsonResponseException.java:145)
at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:113)
at com.google.api.client.googleapis.services.json.AbstractGoogleJsonClientRequest.newExceptionOnError(AbstractGoogleJsonClientRequest.java:40)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest$1.interceptResponse(AbstractGoogleClientRequest.java:321)
at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1056)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:419)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.executeUnparsed(AbstractGoogleClientRequest.java:352)
at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:469)
at DriveQuickStart.main(DriveQuickStart.java:152)
:run FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':run'.
> Process 'command '/usr/local/jdk1.7.0_80/bin/java'' finished with   non-zero exit value 1

那么,什么是文件ID以及如何生成它?

2)在updatePermission中,要设置的id是什么?

3)我想上传我桌面上的文件,如何设置此文件的路径?

感谢。

1 个答案:

答案 0 :(得分:0)

最好的方法是在每个参考页面上查看云端硬盘REST API reference,尤其是' TryIt 'playgroud。

例如,以“insert”开头,使用 TryIt 创建文件,您将看到您创建的文件的ID。这是一个看似时髦的字符串,有时在Android世界中称为“ResourceId”(您也会在“获取可共享链接”地址中看到它。) 您还可以使用'list' here的' TryIt '中的查询(按标题,mimetype,修改日期等...)获取此ID。

从“您的桌面”上传文件涉及您在“insert”参考部分中看到的内容,即您设置

  1. 描述文件的元数据(标题,mimetype,flags,...)
  2. java.io.File形式的文件内容,
  3. 致电:

      

    文件file = service.files()。insert(metdata,content).execute();

    你得到了你的身份证......但我正在重复自己。

    所以,简短的回答是:
    在main()中,您可以从某种搜索(list)获取 ID ,或者从之前创建的文件(insert)获取 ID
    您甚至可以从 https://drive.google.com 中抓取的“可共享链接”http地址中复制/粘贴它。

    祝你好运