用java语言获取阿里云点播视频的视频名称、视频描述、视频分类、视频标签、视频时长、视频大小、存储地址、创建时间、修改时间

要使用Java获取阿里云点播视频的相关信息，需要先引入阿里云Java SDK，并且需要进行认证授权。以下是获取视频信息的示例代码：

import com.aliyun.vod.upload.impl.UploadVideoImpl;
import com.aliyun.vod.upload.req.UploadVideoRequest;
import com.aliyun.vod.upload.resp.UploadVideoResponse;
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.exceptions.ClientException;
import com.aliyuncs.profile.DefaultProfile;
import com.aliyuncs.vod.model.v20170321.GetVideoInfoRequest;
import com.aliyuncs.vod.model.v20170321.GetVideoInfoResponse;

import java.util.List;

public class AliyunVodUtil {
    // 认证信息
    private static final String accessKeyId = "your_access_key_id";
    private static final String accessKeySecret = "your_access_key_secret";
    // 点播服务所在的地区
    private static final String regionId = "cn-shanghai";

    /**
     * 获取视频信息
     * @param videoId 视频ID
     * @return 视频信息
     */
    public static VideoInfo getVideoInfo(String videoId) throws ClientException {
        DefaultAcsClient client = initVodClient(accessKeyId, accessKeySecret);
        GetVideoInfoRequest request = new GetVideoInfoRequest();
        request.setVideoId(videoId);
        GetVideoInfoResponse response = client.getAcsResponse(request);

        VideoInfo videoInfo = new VideoInfo();
        videoInfo.setVideoId(response.getVideo().getVideoId());
        videoInfo.setTitle(response.getVideo().getTitle());
        videoInfo.setDescription(response.getVideo().getDescription());
        videoInfo.setDuration(response.getVideo().getDuration());
        videoInfo.setCreateTime(response.getVideo().getCreationTime());
        videoInfo.setModifyTime(response.getVideo().getModificationTime());
        videoInfo.setStatus(response.getVideo().getStatus());
        videoInfo.setSize(response.getVideo().getSize());
        videoInfo.setCoverURL(response.getVideo().getCoverURL());
        videoInfo.setCateId(response.getVideo().getCateId());
        List<String> tags = response.getVideo().getTags();
        videoInfo.setTags(tags.toArray(new String[tags.size()]));

        return videoInfo;
    }

    /**
     * 初始化点播客户端
     * @param accessKeyId 阿里云AccessKey ID
     * @param accessKeySecret 阿里云AccessKey Secret
     * @return 点播客户端
     */
    private static DefaultAcsClient initVodClient(String accessKeyId, String accessKeySecret) {
        DefaultProfile profile = DefaultProfile.getProfile(regionId, accessKeyId, accessKeySecret);
        return new DefaultAcsClient(profile);
    }

    /**
     * 视频信息类
     */
    public static class VideoInfo {
        private String videoId;
        private String title;
        private String description;
        private Long duration;
        private String createTime;
        private String modifyTime;
        private String status;
        private Long size;
        private String coverURL;
        private String cateId;
        private String[] tags;

        // getter、setter方法
    }
}

使用示例：

public static void main(String[] args) {
    try {
        VideoInfo videoInfo = AliyunVodUtil.getVideoInfo("your_video_id");
        System.out.println("视频名称：" + videoInfo.getTitle());
        System.out.println("视频描述：" + videoInfo.getDescription());
        System.out.println("视频分类：" + videoInfo.getCateId());
        System.out.println("视频标签：" + Arrays.toString(videoInfo.getTags()));
        System.out.println("视频时长：" + videoInfo.getDuration() + "秒");
        System.out.println("视频大小：" + videoInfo.getSize() + "字节");
        System.out.println("存储地址：" + videoInfo.getVideoId());
        System.out.println("创建时间：" + videoInfo.getCreateTime());
        System.out.println("修改时间：" + videoInfo.getModifyTime());
    } catch (ClientException e) {
        e.printStackTrace();
    }
}

需要注意的是，获取视频信息需要使用视频ID，所以在使用上述代码之前，需要先上传视频并获取视频ID。上传视频可以使用阿里云提供的Java SDK中的`UploadVideoImpl`类，示例代码如下：

String accessKeyId = "your_access_key_id";
String accessKeySecret = "your_access_key_secret";
String title = "your_video_title";
String fileName = "your_video_file_name";
String filePath = "your_video_file_path";

UploadVideoRequest request = new UploadVideoRequest(accessKeyId, accessKeySecret, title, fileName);
request.setPartSize(2 * 1024 * 1024L);
request.setTaskNum(1);
request.setUploadURL("http://oss-cn-shanghai.aliyuncs.com");
// 设置上传状态回调地址（可选）
request.setCallback("http://your.callback.url");

UploadVideoImpl uploader = new UploadVideoImpl();
UploadVideoResponse response = uploader.uploadVideo(request, filePath);

if (response.isSuccess()) {
    System.out.println("视频上传成功，视频ID：" + response.getVideoId());
} else {
    System.out.println("视频上传失败，错误信息：" + response.getMessage());
}