云讯健身管理系统-9

1.课程列表的删除

1.1 EduCourseController层

//在课程列表中删除课程
    @ApiOperation(value = "在课程列表中删除课程")
    @DeleteMapping("{courseId}")
    public Result deleteCourse(@PathVariable String courseId){
        courseService.removeCourse(courseId);
        return Result.ok();
    }

1.1.1 EduCourseServiceImpl层

 //在课程列表中删除课程
    @Override
    public void removeCourse(String courseId) {
        //1.根据课程id删除小节
        videoService.removeVideoByCourseId(courseId);
        //2.根据课程id删除章节
        chapterService.removeChapterByCourseId(courseId);
        //3.根据课程id删除课程描述表信息  --描述id与课程id是一样的，可以直接进行删除
        courseDescriptionService.removeById(courseId);
        //4.根据课程id删除课程本身
        int result = baseMapper.deleteById(courseId);
        if(result == 0){
            throw new YunException(20001,"删除失败");
        }

2.阿里云上传视频

2.1 SDK：sdk对api方式进行封装，更方便使用里面的jar包调用阿里云提供的类或者接口里面的方法实现视频功能。阿里云中的APItight了固定地址，只需调用这个固定地址，向地址传递参数，即可实现功能

<dependencies>
        <!-- https://mvnrepository.com/artifact/com.alibaba/easyexcel -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>2.1.1</version>
        </dependency>
    </dependencies>

2.1.1添加maven仓库

  <repositories>
      <repository>
        <id>sonatype-nexus-staging</id>
        <name>Sonatype Nexus Staging</name>
        <url>https://oss.sonatype.org/service/local/staging/deploy/maven2/</url>
        <releases>
            <enabled>true</enabled>
        </releases>
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
      </repository>
    </repositories>  

2.1.1 添加Jar包依赖

<dependency>
    <groupId>com.aliyun</groupId>
    <artifactId>aliyun-java-sdk-core</artifactId>
    <version>4.5.1</version>
  </dependency>
  <dependency>
    <groupId>com.aliyun</groupId>
    <artifactId>aliyun-java-sdk-vod</artifactId>
    <version>2.15.10</version>
  </dependency>
  <dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.2</version>
  </dependency>        

2.2 初始化对象：点播服务的接入区域参考接入区域标识，例如：接入区域在上海，请使用cn-shanghai（默认）

使用账号AccessKey初始化

import com.aliyuncs.profile.DefaultProfile;
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.exceptions.ClientException;

public static DefaultAcsClient initVodClient(String accessKeyId, String accessKeySecret) throws ClientException {
	String regionId = "cn-shanghai";  // 点播服务接入区域
	DefaultProfile profile = DefaultProfile.getProfile(regionId, accessKeyId, accessKeySecret);
	DefaultAcsClient client = new DefaultAcsClient(profile);
	return client;
}

2.3获取视频播放地址：

https://help.aliyun.com/document_detail/61064.html?spm=a2c4g.11186623.6.913.3e873bd9MEWpvk

import com.aliyuncs.vod.model.v20170321.GetPlayInfoRequest;
import com.aliyuncs.vod.model.v20170321.GetPlayInfoResponse;
/*获取播放地址函数*/
public static GetPlayInfoResponse getPlayInfo(DefaultAcsClient client) throws Exception {
    GetPlayInfoRequest request = new GetPlayInfoRequest();
    request.setVideoId("视频ID");
    return client.getAcsResponse(request);
}
/*以下为调用示例*/
public static void main(String[] argv) {
    DefaultAcsClient client = initVodClient("<您的AccessKeyId>", "<您的AccessKeySecret>");
    GetPlayInfoResponse response = new GetPlayInfoResponse();
    try {
        response = getPlayInfo(client);
        List<GetPlayInfoResponse.PlayInfo> playInfoList = response.getPlayInfoList();
        //播放地址
        for (GetPlayInfoResponse.PlayInfo playInfo : playInfoList) {
            System.out.print("PlayInfo.PlayURL = " + playInfo.getPlayURL() + "\n");
        }
        //Base信息
        System.out.print("VideoBase.Title = " + response.getVideoBase().getTitle() + "\n");
    } catch (Exception e) {
        System.out.print("ErrorMessage = " + e.getLocalizedMessage());
    }
    System.out.print("RequestId = " + response.getRequestId() + "\n");
}

2.4 视频功能的实现