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[PROJECT] Xiaomao school (IX)
2022-06-30 18:04:00 【Lemon cap】
Xiaomao school
20. The course is finally released
@RestController
@RequestMapping("/eduservice/course")
@CrossOrigin
public class EduCourseController {
@Autowired
private EduCourseService courseService;
// The course is finally released
// Modify course status
@PostMapping("publishCourse/{id}")
public R publishCourse(@PathVariable String id) {
EduCourse eduCourse = new EduCourse();
eduCourse.setId(id);
eduCourse.setStatus("Normal"); // Set course publishing status
courseService.updateById(eduCourse);
return R.ok();
}
}
// src\api\edu\course.js
import request from '@/utils/request'
export default {
// The course is finally released
publishCourse(id) {
return request({
url: '/eduservice/course/publishCourse/' + id,
method: 'post',
})
}
}
// src\views\edu\course\publish.vue
<script> import course from '@/api/edu/course' export default {
methods: {
publish() {
course.publishCourse(this.courseId) .then(response => {
// Tips this.$message({
type: 'success', message: ' The course was published successfully !' }); // Jump to the course list page this.$router.push({
path: '/course/list' }) }) } } } </script>
21. Course list
@RestController
@RequestMapping("/eduservice/course")
@CrossOrigin
public class EduCourseController {
@Autowired
private EduCourseService courseService;
// Course list Basic implementation
// TODO Perfect conditional query with paging
@GetMapping
public R getCourseList() {
List<EduCourse> list = courseService.list(null);
return R.ok().data("list",list);
}
}
// src\api\edu\course.js
import request from '@/utils/request'
export default {
// TODO Course list
getListCourse() {
return request({
url: '/eduservice/course',
method: 'get'
})
}
}
// src\views\edu\course\list.vue
<template>
<div class="app-container">
Course list
<!-- Query form -->
<el-form :inline="true" class="demo-form-inline">
<el-form-item>
<el-input v-model="courseQuery.title" placeholder=" Course name "/>
</el-form-item>
<el-form-item>
<el-select v-model="courseQuery.status" clearable placeholder=" Course status ">
<el-option :value="Normal" label=" The published "/>
<el-option :value="Draft" label=" Unpublished "/>
</el-select>
</el-form-item>
<el-button type="primary" icon="el-icon-search" @click="getList()"> Inquire about </el-button>
<el-button type="default" @click="resetData()"> Empty </el-button>
</el-form>
<!-- form -->
<el-table :data="list" border fit highlight-current-row>
<el-table-column label=" Serial number " width="70" align="center">
<template slot-scope="scope">
{
{ (page - 1) * limit + scope.$index + 1 }}
</template>
</el-table-column>
<el-table-column prop="title" label=" Course name " width="80" />
<el-table-column label=" Course status " width="80">
<template slot-scope="scope">
{
{ scope.row.status==='Normal'?' The published ':' Unpublished ' }}
</template>
</el-table-column>
<el-table-column prop="lessonNum" label=" Class hours " />
<el-table-column prop="gmtCreate" label=" Add the time " width="160"/>
<el-table-column prop="viewCount" label=" Number of views " width="60" />
<el-table-column label=" operation " width="200" align="center">
<template slot-scope="scope">
<router-link :to="'/teacher/edit/'+scope.row.id">
<el-button type="primary" size="mini" icon="el-icon-edit"> Edit course basic information </el-button>
</router-link>
<router-link :to="'/teacher/edit/'+scope.row.id">
<el-button type="primary" size="mini" icon="el-icon-edit"> Edit course outline information </el-button>
</router-link>
<el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)"> Delete course information </el-button>
</template>
</el-table-column>
</el-table>
<!-- Pagination -->
<el-pagination :current-page="page" :page-size="limit" :total="total" style="padding: 30px 0; text-align: center;" layout="total, prev, pager, next, jumper" @current-change="getList" />
</div>
</template>
<script> // Introduce call course.js file import course from '@/api/edu/course' export default {
// Where to write core code data() {
// Define variables and initial values return {
list: null, // The collection returned by the interface after query page: 1, // The current page limit: 10, // Records per page total: 0, // Total number of records courseQuery: {
} // Conditional encapsulation object } }, created() {
// Execute before rendering the page , The general call methods Method of definition this.getList() }, methods: {
// Create specific methods , call teacher.js Method of definition // How to list lecturers getList() {
course.getListCourse() .then(response => {
// The request is successful // response The data returned by the interface // console.log(response); this.list= response.data.list }) }, resetData() {
// How to clear // The form entry data is cleared this.courseQuery = {
} // Query all instructor data this.getList() }, } } </script>
22. Delete course （ Back end ）
@RestController
@RequestMapping("/eduservice/course")
@CrossOrigin
public class EduCourseController {
@Autowired
private EduCourseService courseService;
// Delete course
@DeleteMapping("{courseId}")
public R deleteCourse(@PathVariable String courseId) {
courseService.removeCourse(courseId);
return R.ok();
}
}
@Service
public class EduCourseServiceImpl extends ServiceImpl<EduCourseMapper, EduCourse> implements EduCourseService {
// Course description
@Autowired
private EduCourseDescriptionService courseDescriptionService;
// Inject sections and chapters service
@Autowired
private EduVideoService eduVideoService;
@Autowired
private EduChapterService eduChapterService;
// Delete course
@Override
public void removeCourse(String courseId) {
// 1. According to the course id Delete section
eduVideoService.removeVideoByCourseId(courseId);
// 2. According to the course id Delete chapter
eduChapterService.removeChapterByCourseId(courseId);
// 3. According to the course id Delete description
courseDescriptionService.removeById(courseId);
// 4. According to the course id Delete the course itself
int result = baseMapper.deleteById(courseId);
if(result == 0) {
// Failure to return
throw new LemonException(20001, " Delete failed ");
}
}
}
public interface EduVideoService extends IService<EduVideo> {
void removeVideoByCourseId(String courseId);
}
@Service
public class EduVideoServiceImpl extends ServiceImpl<EduVideoMapper, EduVideo> implements EduVideoService {
// According to the course id Delete section
// TODO Delete section , Delete the corresponding video file
@Override
public void removeVideoByCourseId(String courseId) {
QueryWrapper<EduVideo> wrapper = new QueryWrapper<>();
wrapper.eq("course_id", courseId);
baseMapper.delete(wrapper);
}
}
public interface EduChapterService extends IService<EduChapter> {
// According to the course id Delete chapter
void removeChapterByCourseId(String courseId);
}
@Service
public class EduChapterServiceImpl extends ServiceImpl<EduChapterMapper, EduChapter> implements EduChapterService {
@Autowired
private EduVideoService videoService; // Injection section service
// According to the course id Delete chapter
@Override
public void removeChapterByCourseId(String courseId) {
QueryWrapper<EduChapter> wrapper = new QueryWrapper<>();
wrapper.eq("course_id", courseId);
baseMapper.delete(wrapper);
}
}
23. Alibaba cloud video on demand
- video on demand （ApsaraVideo for VoD） It's a collection of audio and video collection 、 edit 、 Upload 、 Automatic transcoding 、 Media resource management 、 A one-stop audio and video on demand solution with distribution acceleration .
- Application scenarios
- Audio and video websites ： Whether it's a start-up video service enterprise , Or already have a huge amount of video resources , Customized on-demand services help customers quickly build an extreme viewing experience 、 Secure and reliable VOD applications .
- Short video ： Audio and video shooting 、 Special effects editor 、 Local transcoding 、 High speed upload 、 Automatic cloud transcoding 、 Media resource management 、 Distribution acceleration 、 Play in one complete short video solution . Has helped 1000+APP Fast implementation of mobile phone short video function .
- Live to on demand ： Record the live stream synchronously as a video on demand , For looking back . And support media management 、 Media processing （ Transcoding and content auditing / Smart head map, etc AI Handle ）、 Content production （ Cloud clip ）、CDN Distribution acceleration and a series of operations .
- Online education ： Easy to use for online education customers 、 Secure and reliable VOD service . Through the console /API And other ways to upload teaching videos , The powerful transcoding capability ensures that videos can be released quickly , The acceleration node covering the whole network ensures the fluency of students' watching . Anti theft chain 、 Video encryption and other copyright protection programs protect teaching content from theft .
- Video production ： Provide online visual editing platform and rich OpenAPI, Help customers deal with 、 Making video content . Except for the shear splicing of the foundation 、 Mixing 、 Cover label 、 Special effects 、 Besides a series of functions such as synthesis , Relying on cloud editing and on-demand integrated services, standardization can also be achieved 、 Intelligent editing production , The threshold of video production is greatly reduced , Shorten production time , Improve content productivity .
- Content review ： For short video platform 、 Media industry audit, etc , Help customers from voice 、 written words 、 Vision and other multi-dimensional accurate recognition of video 、 cover 、 The prohibited content of the title or comment is carried out AI Intelligent audit and manual audit .
- Function is introduced
24. Alicloud video on demand SDK（ Get video address ）
Create a video on demand micro service
- Create a microservice module Artifact：service-vod
- pom
- service-vod Introduce dependency in
<dependencies> <dependency> <groupId>com.aliyun</groupId> <artifactId>aliyun-java-sdk-core</artifactId> </dependency> <dependency> <groupId>com.aliyun.oss</groupId> <artifactId>aliyun-sdk-oss</artifactId> </dependency> <dependency> <groupId>com.aliyun</groupId> <artifactId>aliyun-java-sdk-vod</artifactId> </dependency> <dependency> <groupId>com.aliyun</groupId> <artifactId>aliyun-sdk-vod-upload</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> </dependency> <dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> </dependency> <dependency> <groupId>joda-time</groupId> <artifactId>joda-time</artifactId> </dependency> </dependencies>test
public class InitObject { public static DefaultAcsClient initVodClient(String accessKeyId, String accessKeySecret) throws ClientException { String regionId = "cn-shanghai"; // On demand service access area DefaultProfile profile = DefaultProfile.getProfile(regionId, accessKeyId, accessKeySecret); DefaultAcsClient client = new DefaultAcsClient(profile); return client; } }public class TestVod { public static void main(String[] args) throws Exception{ // 1. According to the video id Get video playback address // Create initialization object DefaultAcsClient client = InitObject.initVodClient(" Secret key ", " password "); // Create get video address request and response GetPlayInfoRequest request = new GetPlayInfoRequest(); GetPlayInfoResponse response = new GetPlayInfoResponse(); // towards request Set the video in the object id request.setVideoId("7272bc8cc64344c2a3209c15881712fe"); // Call the method in the initialization object , Pass on request, get data response = client.getAcsResponse(request); List<GetPlayInfoResponse.PlayInfo> playInfoList = response.getPlayInfoList(); // Broadcast address for (GetPlayInfoResponse.PlayInfo playInfo : playInfoList) { System.out.print("PlayInfo.PlayURL = " + playInfo.getPlayURL() + "\n"); } //Base Information System.out.print("VideoBase.Title = " + response.getVideoBase().getTitle() + "\n"); } }
25. Alicloud video on demand SDK（ Get video credentials ）
public class TestVod {
public static void main(String[] args) throws Exception{
// 2. According to the video id Get video playback credentials
// Create initialization object
// Create initialization object
DefaultAcsClient client = InitObject.initVodClient(" Secret key ", " password ");
// Create and obtain video credentials request and response
GetVideoPlayAuthRequest request = new GetVideoPlayAuthRequest();
GetVideoPlayAuthResponse response = new GetVideoPlayAuthResponse();
// towards request Set the video in the object id
request.setVideoId("7272bc8cc64344c2a3209c15881712fe");
// Call the method in the initialization object , Pass on request, get data
response = client.getAcsResponse(request);
System.out.println("platauth: " + response.getPlayAuth());
}
}
26. Alicloud video on demand （ Upload video ）
public class TestVod {
public static void main(String[] args){
String accessKeyId = " Secret key ";
String accessKeySecret = " password ";
String title = "3 - How Does Project Submission Work - upload by sdk"; // The name of the file after uploading
String fileName = "D:/abc/3 - How Does Project Submission Work.mp4"; // The path and name of the local file
// How to upload video
UploadVideoRequest request = new UploadVideoRequest(accessKeyId, accessKeySecret, title, fileName);
/* You can specify the size of each slice when uploading slices , The default is 2M byte */
request.setPartSize(2 * 1024 * 1024L);
/* You can specify the number of concurrent threads during fragment upload , The default is 1,( notes ： This configuration will occupy the server CPU resources , It needs to be specified according to the situation of the server ）*/
request.setTaskNum(1);
UploadVideoImpl uploader = new UploadVideoImpl();
UploadVideoResponse response = uploader.uploadVideo(request);
System.out.print("RequestId=" + response.getRequestId() + "\n"); // Request for video on demand service ID
if (response.isSuccess()) {
System.out.print("VideoId=" + response.getVideoId() + "\n");
} else {
/* If the callback is set URL Invalid , Does not affect the video upload , Can return VideoId At the same time, the error code will be returned . In other cases, the upload fails ,VideoId It's empty , At this time, you need to analyze the specific error reason according to the returned error code */
System.out.print("VideoId=" + response.getVideoId() + "\n");
System.out.print("ErrorCode=" + response.getCode() + "\n");
System.out.print("ErrorMessage=" + response.getMessage() + "\n");
}
}
}
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