我正在使用 youtube-api,当我设置时,视频上传示例工作正常 video_path 字符串到放置在工作区下的“/video_name.mp4”。
private static String video_path = "/video_name.MP4";
但是一旦我将其设置为绝对路径
private static String video_path = "C:/Users/Ip300/Desktop/video_name.MP4";
我收到错误
" Throwable: null java.lang.NullPointerException..."
就像视频不存在一样。 PS:我在 Windows 上测试了它正确重定向到视频的路径。
完整代码是:
public class UploadVideo {
private static YouTube youtube;
private static final String VIDEO_FILE_FORMAT = "video/*";
private static final String SAMPLE_VIDEO_FILENAME = "video_name.mp4";
private static String video_path = "C:/Users/Ip300/Desktop/video_name.MP4";
public static void main(String[] args) {
List<String> scopes = Lists.newArrayList("https://www.googleapis.com/auth/youtube.upload");
try {
Credential credential = Auth.authorize(scopes, "uploadvideo");
youtube = new YouTube.Builder(Auth.HTTP_TRANSPORT, Auth.JSON_FACTORY, credential).setApplicationName(
"youtube-cmdline-uploadvideo-sample").build();
System.out.println("Uploading: " + SAMPLE_VIDEO_FILENAME);
Video videoObjectDefiningMetadata = new Video();
VideoStatus status = new VideoStatus();
status.setPrivacyStatus("public");
videoObjectDefiningMetadata.setStatus(status);
VideoSnippet snippet = new VideoSnippet();
Calendar cal = Calendar.getInstance();
snippet.setTitle("Test Upload via Java on " + cal.getTime());
snippet.setDescription(
"Video uploaded via YouTube Data API V3 using the Java library " + "on " + cal.getTime());
// Set the keyword tags that you want to associate with the video.
List<String> tags = new ArrayList<String>();
tags.add("test");
tags.add("example");
tags.add("java");
tags.add("YouTube Data API V3");
tags.add("erase me");
snippet.setTags(tags);
videoObjectDefiningMetadata.setSnippet(snippet);
InputStreamContent mediaContent = new InputStreamContent(VIDEO_FILE_FORMAT,
UploadVideo.class.getResourceAsStream(video_path));
YouTube.Videos.Insert videoInsert = youtube.videos()
.insert("snippet,statistics,status", videoObjectDefiningMetadata, mediaContent);
MediaHttpUploader uploader = videoInsert.getMediaHttpUploader();
uploader.setDirectUploadEnabled(false);
MediaHttpUploaderProgressListener progressListener = new MediaHttpUploaderProgressListener() {
public void progressChanged(MediaHttpUploader uploader) throws IOException {
switch (uploader.getUploadState()) {
case INITIATION_STARTED:
System.out.println("Initiation Started");
break;
case INITIATION_COMPLETE:
System.out.println("Initiation Completed");
break;
case MEDIA_IN_PROGRESS:
System.out.println("Upload in progress");
System.out.println("Upload percentage: " + uploader.getProgress());
break;
case MEDIA_COMPLETE:
System.out.println("Upload Completed!");
break;
case NOT_STARTED:
System.out.println("Upload Not Started!");
break;
}
}
};
uploader.setProgressListener(progressListener);
System.out.println("\n================== Returned Video ==================\n");
System.out.println(" - Id: " + returnedVideo.getId());
System.out.println(" - Title: " + returnedVideo.getSnippet().getTitle());
System.out.println(" - Tags: " + returnedVideo.getSnippet().getTags());
System.out.println(" - Privacy Status: " + returnedVideo.getStatus().getPrivacyStatus());
System.out.println(" - Video Count: " + returnedVideo.getStatistics().getViewCount());
} catch (GoogleJsonResponseException e) {
System.err.println("GoogleJsonResponseException code: " + e.getDetails().getCode() + " : "
+ e.getDetails().getMessage());
e.printStackTrace();
} catch (IOException e) {
System.err.println("IOException: " + e.getMessage());
e.printStackTrace();
} catch (Throwable t) {
System.err.println("Throwable: " + t.getMessage());
t.printStackTrace();
}
}
}
最佳答案
Class.getResourceAsStream()
需要一个前导“/”,以便将路径解释为绝对路径。如果没有它,路径应该是相对路径。
而 ClassLoader.getResourceAsStream()
仅使用绝对路径,因此不需要前导“/”。
如果找不到资源,两者都会返回null
。
您可以使用 UploadVideo.class.getResourceAsStream()
方法来初始化 YouTube.Videos.Insert videoInsert
。
欲了解更多信息: http://www.javaworld.com/article/2077352/java-se/smartly-load-your-properties.html
Note: If you use a native path and work on a Windows machine, the proper file seperator is ' \ ' instead of ' / '.
However for native paths ( e.g. c:\path\file ) there is no need for
getResourceAsStream()
. You can simply usenew FileInputStream("c:\path\file")
;
关于java - 使用 YOUTUBE-API 的视频路径字符串,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43239485/