富文本编辑器Tinymce

一、Tinymce可视化编辑器

参考
https://panjiachen.gitee.io/vue-element-admin/#/components/tinymce
https://panjiachen.gitee.io/vue-element-admin/#/example/create

二、组件初始化

Tinymce是一个传统javascript插件，默认不能用于Vue.js因此需要做一些特殊的整合步骤。

1. 复制脚本库

将脚本库复制到项目的static目录下（在vue-element-admin-master的static路径下）。

2. 配置html变量

在 build/webpack.dev.conf.js 中添加配置
使在html页面中可是使用这里定义的BASE_URL变量

new HtmlWebpackPlugin({
    ......,
    templateParameters: {
    	BASE_URL: config.dev.assetsPublicPath + config.dev.assetsSubDirectory
    }
})

3. 引入js脚本

在 /index.html 中引入js脚本

<script src=<%= BASE_URL %>/tinymce4.7.5/tinymce.min.js></script>
<script src=<%= BASE_URL %>/tinymce4.7.5/langs/zh_CN.js></script>

三、组件引入

为了让Tinymce能用于Vue.js项目，vue-element-admin-master对Tinymce进行了封装，下面我们将它引入到我们的课程信息页面。

1. 复制组件

src/components/Tinymce

2. 引入组件

课程信息组件中引入 Tinymce

//引入Tinymce富文本编辑器组件
import Tinymce from '@/components/Tinymce';

export default {
    ....
  components: { Tinymce },
}

3. 组件模板

      <!-- 课程简介-->
      <el-form-item label="课程简介">
        <tinymce :height="300" v-model="courseInfo.description"/>
      </el-form-item>

4. 组件样式

在 info.vue 文件的最后添加如下代码，调整上传图片按钮的高度。

<style scoped>
  .tinymce-container {
  line-height: 29px;
  }
</style>

5. 效果测试

在这里插入图片描述

四、测试

图片的base64编码
Tinymce中的图片上传功能直接存储的是图片的base64编码，因此无需图片服务器
后台报错
修改数据库description字段类型
添加的数据中发现一级分类没有值

在 eduservice.entity.vo.CourseInfo 中添加一级分类属性。
要求跟前端一级分类属性的名称一样，否则获取不到数据。
```
 @ApiModelProperty(value = "一级分类ID")
    private String subjectParentId;
```
重启服务，再次进行测试，添加的课程就有对应的一级分类对应的id值

课程大纲列表显示

一、后端实现

1. 实体类

创建 chapter 包，在此包下创建 ChapterVo 和 VideoVo 实体类。
chapterVo:

@Data
public class ChapterVo {
    private static final long serialVersionUID = 1L;

    private String id;

    private String title;

    //表示小节
    private List<VideoVo> children = new ArrayList<VideoVo>();

}

VideoVo:

@Data
public class VideoVo {
    private static final long serialVersionUID = 1L;

    private String id;

    private String title;

    private Boolean free;
}

2. controller

创建 EduChapterController 类：

@RestController
@CrossOrigin
@RequestMapping("/eduservice/chapter")
public class EduChapterController {

    @Autowired
    private EduChapterService eduChapterService;

    // 课程大纲列表，根据课程id进行查询
    @GetMapping("getChapterVideo/{courseId}")
    public R getChapterVideo(@PathVariable String courseId) {
        List<ChapterVo> list = eduChapterService.getChapterVideoByCourseId(courseId);
        return  R.ok().data("allChapterVideo", list);
    }

}

3. service

EduChapterService 接口：

public interface EduChapterService extends IService<EduChapter> {

    // 课程大纲列表，根据课程id进行查询
    List<ChapterVo> getChapterVideoByCourseId(String courseId);
}

EduChapterServiceImpl 实现类：

@Service
public class EduChapterServiceImpl extends ServiceImpl<EduChapterMapper, EduChapter> implements EduChapterService {

    @Autowired
    private EduVideoService videoService;

    // 课程大纲列表，根据课程id进行查询
    @Override
    public List<ChapterVo> getChapterVideoByCourseId(String courseId) {

        // 1. 根据课程id查询课程里面所有的章节
        QueryWrapper<EduChapter> wrapperChapter = new QueryWrapper<>();
        wrapperChapter.eq("course_id", courseId);
        List<EduChapter> eduChapterList = baseMapper.selectList(wrapperChapter);

        // 2. 根据课程id查询课程里面所有的小节
        QueryWrapper<EduVideo> wrapperVideo = new QueryWrapper<>();
        wrapperVideo.eq("course_id", courseId);
        List<EduVideo> eduVideoList = videoService.list(wrapperVideo);

        // 创建list集合，用于最终封装数据
        List<ChapterVo> finalList = new ArrayList<>();

        // 3. 遍历查询章节list集合进行封装
        //遍历查询章节list集合
        for (int i = 0; i < eduChapterList.size(); i ++) {
            // 每个章节
            EduChapter eduChapter = eduChapterList.get(i);
            // eduChapter 对象值复制到ChapterVo里面
            ChapterVo chapterVo = new ChapterVo();
            BeanUtils.copyProperties(eduChapter, chapterVo);
            // 把chapterVo放到最终list集合
            finalList.add(chapterVo);

            // 创建集合，用于封装章节的小节
            List<VideoVo> videoList  = new ArrayList<>();

            // 4. 遍历查询小节list集合，进行封装
            for (int j = 0; j < eduVideoList.size(); j++) {
                // 得到每个小节
                EduVideo eduVideo = eduVideoList.get(j);
                // 判断：小节里面chapterId和章节里面id是否一样
                if (eduVideo.getChapterId().equals(eduChapter.getId())) {
                    // 进行封装
                    VideoVo videoVo = new VideoVo();
                    BeanUtils.copyProperties(eduVideo, videoVo);
                    // 放到小节封装集合
                    videoList.add(videoVo);
                }
            }
            // 把封装之后小节list集合，放到章节对象里面
            chapterVo.setChildren(videoList);
        }

        return finalList;
    }
}

4. Swagger测试

在这里插入图片描述

测试结果如下：

// Response Body
{
  "success": true,
  "code": 20000,
  "message": "成功",
  "data": {
    "allChapterVideo": [
      {
        "id": "1",
        "title": "第一章：HTML",
        "children": [
          {
            "id": "17",
            "title": "第一节：Java简介",
            "free": null
          },
          {
            "id": "19",
            "title": "第三节：String类",
            "free": null
          }
        ]
      },
      {
        "id": "2",
        "title": "第二章：CSS",
        "children": [
          {
            "id": "18",
            "title": "第二节：表达式和赋值语句",
            "free": null
          },
          {
            "id": "20",
            "title": "第四节：程序风格",
            "free": null
          }
        ]
      },
      {
        "id": "32",
        "title": "第二章：控制台输入和输出",
        "children": [
          {
            "id": "1182499307429339137",
            "title": "第一节",
            "free": null
          }
        ]
      },
      {
        "id": "44",
        "title": "第三章：控制流",
        "children": []
      }
    ]
  }
}

二、前端实现

1. 定义api

api/edu/chapter.js

import request from '@/utils/request' //引入已经封装好的axios 和 拦截器

export default{
    //根据课程id获取章节和小节数据列表
    getAllChapterVideo(courseId){
        return request({
            url:`/eduservice/chapter/getChapterVideo/${courseId}`,
            method: 'get',
        })
    },
}

2. 定义组件脚本

引入api脚本方法

import chapter from '@/api/edu/chapter'

定义data

data() {
    return {
      .........
      chapterVideoList:[]
    };
  },

定义相关methods获取章节和课时列表

methods: {
    // 根据课程id查询对应的课程章节和小节
    getChapterVideo() {
        chapter.getAllChapterVideo(this.courseId) 
            .then(response => {
                this.chapterVideoList = response.data.allChapterVideo
            })
    },

定义created方法

created() {
        // 获取路由的id值
        if(this.$route.params && this.$route.params.id) {
            this.courseId = this.$route.params.id
    }
        // 根据课程id查询对应的课程章节和小节
        this.getChapterVideo()
  },

3. 定义组件模板

<template>
  <div class="app-container">
    <h2 style="text-align: center">发布新课程</h2>
    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息" />
      <el-step title="创建课程大纲" />
      <el-step title="最终发布" />
    </el-steps>
    
    <!-- 章节 -->
    <ul class="chanpterList">
      <li v-for="chapter in chapterVideoList" :key="chapter.id">
        <p>
          {{ chapter.title }}
        </p>

        <!-- 小节 -->
        <ul class="chanpterList videoList">
          <li v-for="video in chapter.children" :key="video.id">
            <p>
                {{ video.title }}
            </p>
          </li>
        </ul>
      </li>
    
    </ul>


    <el-form label-width="120px">
      <el-form-item>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next"
          >下一步</el-button
        >
      </el-form-item>
    </el-form>
  </div>
</template>

4. 定义样式

将样式的定义放在页面的最后。
scope 表示这里定义的样式只在当前页面范围内生效，不会污染到其他的页面。

<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
  font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}

</style>

5. 测试

在这里插入图片描述

修改课程信息

一、后端实现

1. 根据课程id查询课程基本信息

EduCourseController

  // 根据课程id查询课程基本信息
    @GetMapping("getCourseInfo/{courseId}")
    public R getCourseInfo(@PathVariable String courseId) {
        CourseInfoVo courseInfoVo = courseService.getCourseInfo(courseId);
        return R.ok().data("courseInfoVo", courseInfoVo);
    }

EduCourseService

// 根据课程id查询课程基本信息
    CourseInfoVo getCourseInfo(String courseId);

EduCourseServiceImpl

// 根据课程id查询课程基本信息
    @Override
    public CourseInfoVo getCourseInfo(String courseId) {

        // 查询课程表
        EduCourse eduCourse = baseMapper.selectById(courseId);
        CourseInfoVo courseInfoVo = new CourseInfoVo();
        BeanUtils.copyProperties(eduCourse, courseInfoVo);

        // 查询描述表
        EduCourseDescription courseDescription = courseDescriptionService.getById(courseId);
        courseInfoVo.setDescription(courseDescription.getDescription());

        return courseInfoVo;
    }

2. 修改课程信息

EduCourseController

// 修改课程信息
    @PostMapping("updateCourseInfo")
    public R updateCourseInfo(@RequestBody CourseInfoVo courseInfoVo) {
        courseService.updateCourseInfo(courseInfoVo);
        return R.ok();
    }

EduCourseService

// 修改课程信息
    void updateCourseInfo(CourseInfoVo courseInfoVo);

EduCourseServiceImpl

 // 修改课程信息
    @Override
    public void updateCourseInfo(CourseInfoVo courseInfoVo) {
        // 1.修改课程表
        EduCourse eduCourse = new EduCourse();
        BeanUtils.copyProperties(courseInfoVo, eduCourse);
        int update = baseMapper.updateById(eduCourse);
        if (update == 0) {
            throw new GuliException(20001, "修改课程信息失败");
        }


        // 2.修改描述表
        EduCourseDescription description = new EduCourseDescription();
        description.setId(courseInfoVo.getId());
        description.setDescription(courseInfoVo.getDescription());
        courseDescriptionService.updateById(description);

    }

二、前端实现

定义api
src\api\edu\course.js

 //根据课程id 查询课程基本信息
        getCourseInfoId(id){
            return request({
                url:`/eduservice/course/getCourseInfo/${id}`,
                method: 'get',
            })
        },

        //修改课程信息
        updateCourseInfo(courseInfo){
            return request({
                url:"/eduservice/course/updateCourseInfo",
                method: 'post',
                data: courseInfo
            })
        }

修改chapter页面跳转路径

 //跳转到上一步
    previous() {
      this.$router.push({ path: "/course/info/"+this.courseId});
    },
    next() {
      //跳转到第三步
      this.$router.push({ path: "/course/publish/"+this.courseId});
    },

info页面 data

  data() {
    return {
		...
      courseId: "",
    };
  }

info页面 methods

 methods: {
    // 根据课程id查询
    getInfo() {
        course.getCourseInfoId(this.courseId) 
          .then(response => {
            this.courseInfo = response.data.courseInfoVo
          })
    },
    .....
}

info页面 created()

created(){
        // 获取路由id值
        if (this.$route.params && this.$route.params.id) {
          this.courseId = this.$route.params.id
          // 调用根据id查询课程的方法
          this.getInfo()
        }
		....
    },

测试

上面测试，二级分类中的数据显示出现了问题

created(){
        // 获取路由id值
        if (this.$route.params && this.$route.params.id) {
          this.courseId = this.$route.params.id
          // 调用根据id查询课程的方法
          this.getInfo()
        } else {
          // 初始化所有讲师
          this.getListTeacher()
          // 初始化一级分类
          this.getOneSubject()
        } 
    },

 getInfo() {
        course.getCourseInfoId(this.courseId) 
          .then(response => {
            // 在courseInfo课程信息基本信息，包含一级分类id 和 二级分类id
            this.courseInfo = response.data.courseInfoVo
            // 1. 查询所有的分类，包含一级和二级
            subject.getSubjectList()
              .then(response => {
                // 2.获取所有一级分类
                this.subjectOneList = response.data.list

                //3. 把所有的一级分类数组进行遍历
                for (var i=0;i<this.subjectOneList.length;i++) {
                  //获取每一个一级分类
                  var oneSubject = this.subjectOneList[i]
                  // 比较当前courseInfo里面一级分类id和所有一级 分类id
                  if(this.courseInfo.subjectParentId == oneSubject.id) {
                    //获取一级分类所有的二级分类
                    this.subjectTwoList=oneSubject.children
                  }
                }
              })
              //初始化所有讲师
              this.getListTeacher()

          })
    },

在这里插入图片描述

还有一个问题，就是回显数据后，再点击添加课程，数据还在，应该是清空数据
添加监听器，监听路由，如果路由变化，就将courseInfo的数据清空：
```
  watch: {
    $route(to, from) {
      //路由变化方式，当路由发送变化，方法就执行
      console.log("watch $route");
      this.courseInfo={}
    },
  }
```

实现修改功能
src\views\edu\course\info.vue

    //添加课程
    //添加课程
addCourse() {
  course.addCourseInfo(this.courseInfo).then(response => {
    this.$message({
      message: "添加课程信息成功",
      type: "success",
    });
    //跳转到第二步,并带着这个课程生成的id
    this.$router.push({ path: "/course/chapter/" + resp.data.courseId });
  });
},

//修改课程
updateCourse() {
  course.updateCourseInfo(this.courseInfo).then(response => {
    this.$message({
      message: "修改课程信息成功",
      type: "success",
    });
    //跳转到第二步,并带着这个课程生成的id
    this.$router.push({ path: "/course/chapter/" + this.courseId });
  });
},

//判断是修改还是新增
saveOrUpdate() {
  //判断courseInfo中是否有id值
  if (this.courseInfo.id) {
    //有id值，为修改
    this.updateCourse();
  } else {
    //没id值，为添加
    this.addCourse();
  }
}

课程章节添加、修改、删除功能

一、后端实现

EduChapterController:

// 添加章节
    @PostMapping("addChapter")
    public R addChapter(@RequestBody EduChapter eduChapter) {
        eduChapterService.save(eduChapter);
        return R.ok();
    }

    // 根据章节id查询
    @GetMapping("getChapterInfo/{chapterId")
    public R getChapterInfo(@PathVariable String chapterId) {
        EduChapter eduChapter = eduChapterService.getById(chapterId);
        return R.ok().data("chapter", eduChapter);
    }

    // 修改章节
    @PostMapping("updateChapter")
    public R updateChapter(@RequestBody EduChapter eduChapter) {
        eduChapterService.updateById(eduChapter);
        return R.ok();
    }

    // 删除的方法
    @DeleteMapping("{chapterId}")
    public R deleteChapter(@RequestBody String chapterId) {
        boolean flag = eduChapterService.deleteChapter(chapterId);
        if (flag) {
            return R.ok();
        } else {
            return R.error();
        }

    }

EduChapterService:

// 删除的方法
    boolean deleteChapter(String chapterId);

EduChapterServiceImpl:

// 删除的方法
    @Override
    public boolean deleteChapter(String chapterId) {
        // 根据chapterId章节id 查询小节表，如果查询到数据则不进行删除
        QueryWrapper<EduVideo> wrapper = new QueryWrapper<>();
        wrapper.eq("chapter_id", chapterId);
        int count = videoService.count(wrapper);
        // 判断
        if (count > 0) { // 查询出小节，不进行删除
            throw new GuliException(20001, "不能删除");
        } else { // 不能查询数据，进行删除
            // 删除章节
            int result = baseMapper.deleteById(chapterId);
            return result > 0;
        }
    }

二、前端实现

1. 课程添加功能

定义api

//添加章节
        addChapter(chapter) {
            return request({
                url: `/eduservice/chapter/addChapter`,
                method: `post`,
                data: chapter
            })
        },
        //根据id查询章节
        getChapter(chapterID) {
            return request({
                url: `/eduservice/chapter/getChapterInfo/${chapterID}`,
                method: `get`,
            })
        },
        //修改章节
        updateChapter(chapter) {
            return request({
                url: `/eduservice/chapter/updateChapter`,
                method: `post`,
                data: chapter
            })
        },
        //删除章节
        deleteChapter(chapterID) {
            return request({
                url: `/eduservice/chapter/${chapterID}`,
                method: `delete`,
            })
        }

引入api
import chapter from '@/api/edu/chapter'

methods方法

methods: {
	//添加章节
    saveChapter() {
      //设置课程id到chapter对象中
      this.chapter.courseId = this.courseId
      chapter.addChapter(this.chapter).then((resp) => {
        //关闭弹框
        this.dialogChapterFormVisible = false;
        //提示信息
        this.$message({
          message: "添加章节成功",
          type: "success",
        });
        //刷新页面
        this.getChapterVideoByCourseId()
      });
    },
    saveOrUpdate() {
          this.saveChapter()
        }
}

测试

设置弹出表单时，清空数据

<el-button type="text" @click="openChapterDialog()">添加章节</el-button>

openChapterDialog(){
        // 弹框
        this.dialogChapterFormVisible = true
        // 表单数据清空
        this.chapter.title = ''
        this.chapter.sort = 0
    },

2. 修改课程功能

template

<p>
          {{ chapter.title }}

           <span class="acts">
                <el-button style="" type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
                <el-button type="text">删除</el-button>
            </span>
</p>

methods方法

// 修改章节弹框数据回显
    openEditChapter(chapterId) {
        // 弹框
        this.dialogChapterFormVisible = true
        // 调用接口
        chapter.getChapter(chapterId)
            .then(response => {
                this.chapter = response.data.chapter
            })
    },

// 添加章节
    addChapter() {

        // 设置课程id到chapter对象里面
        this.chapter.courseId = this.courseId
        chapter.addChapter(this.chapter)
            .then(response => {
                // 关闭弹框
                this.dialogChapterFormVisible = false
                // 提示
                this.$message({
                message: "添加章节成功",
                type: "success",
             });
             // 刷新页面
             this.getChapterVideo()
            })
    },
    // 修改章节的方法
    updateChapter() {
        chapter.updateChapter(this.chapter)
            .then(response => {
                // 关闭弹框
                this.dialogChapterFormVisible = false
                // 提示
                this.$message({
                message: "修改章节成功",
                type: "success",
             });
             // 刷新页面
             this.getChapterVideo()
            })
    },

    saveOrUpdate() {
        if(!this.chapter.id) {
            this.addChapter()
        } else {
            this.updateChapter()
        }
        
    },

3. 删除课程功能

<el-button type="text"  @click="removeChapter(chapter.id)">删除</el-button>

 // 删除章节
       removeChapter(chapterId) {
            this.$confirm('此操作将永久删除课程记录, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                chapter.deleteChapter(chapterId)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    // 刷新页面
                    this.getChapterVideo()
                })
            }) //点击取消，执行catch方法
        },

课程章节小节功能

一、后端实现

EduVideoController:

@RestController
@CrossOrigin
@RequestMapping("/eduservice/video")
public class EduVideoController {

    @Autowired
    private EduVideoService videoService;

    // 添加小节
    @PostMapping("addVideo")
    public R addVideo(@RequestBody EduVideo eduVideo) {
        videoService.save(eduVideo);
        return  R.ok();
    }

    // 删除小节
    @DeleteMapping("{id}")
    public R deleteVideo(@PathVariable String id) {
        videoService.removeById(id);
        return R.ok();
    }

    // 根据小节id查询
    @PostMapping("getVideoById/{videoId}")
    public R getVideoById(@PathVariable String videoId) {
        EduVideo eduVideo = videoService.getById(videoId);
        return R.ok().data("video", eduVideo);
    }

    // 修改小节
    @PostMapping("/updateVideo")
    public R updateVideo(@PathVariable EduVideo eduVideo) {
        videoService.updateById(eduVideo);
        return R.ok();
    }


}

EduVideo:

@ApiModelProperty(value = "创建时间")
    @TableField(fill = FieldFill.INSERT)
    private Date gmtCreate;

    @ApiModelProperty(value = "更新时间")
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Date gmtModified;

二、前端实现

1. 添加小节功能

template

<el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>

 <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
    <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
        <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
        <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
        <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
        </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
        <!-- TODO -->
        </el-form-item>
    </el-form>
    <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
    </div>
    </el-dialog>

定义api
src\api\edu\video.js

import request from '@/utils/request' //引入已经封装好的axios 和 拦截器

export default{

        //添加小节
        addVideo(video) {
            return request({
                url: `/eduservice/video/addVideo`,
                method: `post`,
                data: video
            })
        },

        //根据id查询小节
        getVideoById(videoId) {
            return request({
                url: `/eduservice/video/getVideoById/${videoId}`,
                method: `get`,
            })
        },

        //修改小节
        updateVideo(video) {
            return request({
                url: `/eduservice/video/updateVideo`,
                method: `post`,
                data: video
            })
        },
        //删除小节
        deleteChapter(id) {
            return request({
                url: `/eduservice/video/${id}`,
                method: `delete`,
            })
        }
    
}

引入js
```
import video from '@/api/edu/video'
```

methods方法

openVideo(chapterId) {
        // 弹框
        this.dialogVideoFormVisible = true
        // 清空数据
        this.video={},
        // 设置章节id
        this.video.chapterId = chapterId
     },

// 添加小节
     addVideo() {
        // 设置课程id
        this.video.courseId = this.courseId
        video.addVideo(this.video)
            .then(response => {
                // 关闭弹框
                this.dialogVideoFormVisible = false
                // 提示
                this.$message({
                    message: "添加小节成功",
                    type: "success",
                });
                // 刷新页面
                this.getChapterVideo()
            })
     },

     saveOrUpdateVideo() {
        this.addVideo()
     },

测试

2. 删除小节功能

template

<span class="acts">
                    <el-button style="" type="text" >编辑</el-button>
                    <el-button type="text"  @click="removeVideo(video.id)">删除</el-button>
                </span>

methods方法

 // 删除小节
     removeVideo(id) {
         this.$confirm('此操作将永久删除小节记录, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                video.deleteChapter(id)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    // 刷新页面
                    this.getChapterVideo()
                })
            }) //点击取消，执行catch方法
     },

测试

3. 修改小节功能

template

<p>
                {{ video.title }}
                <span class="acts">
                    <el-button style="" type="text" @click="openEditVideo(video.id)">编辑</el-button>
                    <el-button type="text"  @click="removeVideo(video.id)">删除</el-button>
                </span>
 </p>

methods方法

//修改小节表单回显
    openEditVideo(videoId) {
        // 弹框
        this.dialogVideoFormVisible = true
        // 调用接口
        video.getVideoById(videoId)
            .then(response => {
                this.video = response.data.video
            })
    },

 // 添加小节
     addVideo() {
        // 设置课程id
        this.video.courseId = this.courseId
        video.addVideo(this.video)
            .then(response => {
                // 关闭弹框
                this.dialogVideoFormVisible = false
                // 提示
                this.$message({
                    message: "添加小节成功",
                    type: "success",
                });
                // 刷新页面
                this.getChapterVideo()
            })
     },


    // 修改小节
    updateVideoById(videoId) {

        video.updateVideo(this.video)
            .then(response => {
                // 关闭弹框
                this.dialogVideoFormVisible = false
                // 提示
                this.$message({
                    message: "修改小节成功",
                    type: "success",
                });
                // 刷新页面
                this.getChapterVideo()
            })
    },
    
     saveOrUpdateVideo() {
        if(!this.video.id) {
            this.addVideo()
        } else {
            this.updateVideoById()
        }
     },

测试

课程最终发布

一、后端实现

CoursePublishVo

@ApiModel(value = "课程发布信息")
@Data
public class CoursePublishVo implements Serializable {
    private static final long serialVersionUID = 1L;

    private String id; //课程id

    private String title; //课程名称

    private String cover; //封面

    private Integer lessonNum;//课时数

    private String subjectLevelOne; //一级分类

    private String subjectLevelTwo; //二级分类

    private String teacherName; //讲师名称

    private String price; //价格 ，只用于显示
}

EduCourseController

// 根据课程id查询课程确认信息
    @GetMapping("getPublishCourseInfo/{id}")
    public R getPublishCourseInfo(@PathVariable String id) {
        CoursePublishVo coursePublishVo = courseService.publishCourseInfo(id);
        return R.ok().data("publishCourse", coursePublishVo);
    }

EduCourseMapper

public interface EduCourseMapper extends BaseMapper<EduCourse> {

    public CoursePublishVo getPublishCourseInfo(String courseId);
}

EduCourseMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.atguigu.eduservice.mapper.EduCourseMapper">

    <!--sql语句：根据课程id查询课程确认信息-->
    <select id="getPublishCourseInfo" resultType="com.atguigu.eduservice.entity.vo.CoursePublishVo">

        SELECT
            c.title,
            c.cover,
            c.lesson_num AS lessonNum,
            CONVERT(c.price, DECIMAL(8,2)) AS price,
            s1.title AS subjectLevelOne,
            s2.title AS subjectLevelTwo,
            t.name AS teacherName
        FROM
            edu_course c
                LEFT JOIN edu_teacher t ON c.teacher_id = t.id
                LEFT JOIN edu_subject s1 ON c.subject_parent_id = s1.id
                LEFT JOIN edu_subject s2 ON c.subject_id = s2.id
        WHERE
            c.id = #{id}

    </select>


</mapper>

EduCourseService

    // 根据课程id查询课程确认信息
    CoursePublishVo publishCourseInfo(String id);

EduCourseServiceImpl

// 根据课程id查询课程确认信息
    @Override
    public CoursePublishVo publishCourseInfo(String id) {
        // 调用mapper
        return baseMapper.getPublishCourseInfo(id);
    }

Swagger测试
报错
报错原因以及解决方案
原因： 这个错误是 maven 默认加载机制造成问题， maven 加载的时候，把 java 文件夹里面 .java 类型文件进行编译，如果其他类型文件，不会加载。

解决方法：
- 1.复制 xml 到 target 目录中
- 2.把 xml 文件放到 resourses 目录中
- 3.推荐使用：使用配置实现
  （1) pom.xml
  （2）项目 application.properties

在 service 模块下的 pom.xml 加入配置

    <!-- 项目打包时会将java目录中的*.xml文件也进行打包 -->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>

application.properties 下指定 xml 文件夹

#配置mapper xml文件的路径
mybatis-plus.mapper-locations=classpath:com/atguigu/eduservice/mapper/xml/*.xml

再次进行测试

二、前端实现

定义api

    // 课程确认信息
        getPublishCourseInfo(id){
            return request({
                url:"/eduservice/course/getPublishCourseInfo/"+id,
                method: 'get',
            })
        }

导入api方法
```
import course from "@/api/edu/course"
```

定义方法

export default {
    data() {
        return {
        saveBtnDisabled: false, // 保存按钮是否禁用
        courseId: '',
        coursePublish: {}
        };
    },

    created() {
    //获取路由中的id值
    if(this.$route.params && this.$route.params.id){
      this.courseId = this.$route.params.id
      //调用接口方法根据课程id查询课程信息
      this.getCoursePublishId()
    }   
  },

    methods: {

        // 根据课程id查询
        getCoursePublishId() {
              course.getPublishCourseInfo(this.courseId)
                .then(response => {
                    this.coursePublish = response.data.publishCourse
                })
        },

       ......

    },

};

组件模板

<template>
  <div class="app-container">
    <h2 style="text-align: center">发布新课程</h2>
    <el-steps
      :active="3"
      process-status="wait"
      align-center
      style="margin-
bottom: 40px;"
    >
      <el-step title="填写课程基本信息" />
      <el-step title="创建课程大纲" />
      <el-step title="最终发布" />
    </el-steps>
    <div class="ccInfo">
      <img :src="coursePublish.cover" />
      <div class="main">
        <h2>{{ coursePublish.title }}</h2>
        <p class="gray">
          <span>共{{ coursePublish.lessonNum }}课时</span>
        </p>
        <p>
          <span
            >所属分类：{{ coursePublish.subjectLevelOne }} —
            {{ coursePublish.subjectLevelTwo }}</span
          >
        </p>
        <p>课程讲师：{{ coursePublish.teacherName }}</p>
        <h3 class="red">￥{{ coursePublish.price }}</h3>
      </div>
    </div>
    <el-form label-width="120px">
      <el-form-item>
        <el-button @click="previous">返回修改</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="publish"
          >发布课程</el-button
        >
      </el-form-item>
    </el-form>
  </div>
</template>

页面样式

<style scoped>
.ccInfo {
  background: #f5f5f5;
  padding: 20px;
  overflow: hidden;
  border: 1px dashed #ddd;
  margin-bottom: 40px;
  position: relative;
}
.ccInfo img {
  background: #d6d6d6;
  width: 500px;
  height: 278px;
  display: block;
  float: left;
  border: none;
}
.ccInfo .main {
  margin-left: 520px;
}
.ccInfo .main h2 {
  font-size: 28px;
  margin-bottom: 30px;
  line-height: 1;
  font-weight: normal;
}
.ccInfo .main p {
  margin-bottom: 10px;
  word-wrap: break-word;
  line-height: 24px;
  max-height: 48px;
  overflow: hidden;
}
.ccInfo .main p {
  margin-bottom: 10px;
  word-wrap: break-word;
  line-height: 24px;
  max-height: 48px;
  overflow: hidden;
}
.ccInfo .main h3 {
  left: 540px;
  bottom: 20px;
  line-height: 1;
  font-size: 28px;
  color: #d32f24;
  font-weight: normal;
  position: absolute;
}
</style>

测试

课程最终发布

一、后端实现

EduCourseController

// 课程最终发布
    // 修改课程状态
    @PostMapping("publishCourse/{id}")
    public R publishCourse(@PathVariable String id) {
        EduCourse eduCourse = new EduCourse();
        eduCourse.setId(id);
        eduCourse.setStatus("Normal"); // 设置课程发布状态
        boolean flag = courseService.updateById(eduCourse);
        if (flag) {
            return R.ok();
        } else {
            return R.error();
        }
    }

二、前端实现

定义api

 //课程最终发布
        publishCourse(id) {
            return request({
                url: "/eduservice/course/publishCourse/" + id,
                method: 'post',
            })
        }

定义方法

<el-button :disabled="saveBtnDisabled" type="primary" @click="publish">发布课程</el-button>

//发布课程
            publish() {
            this.$confirm("你确定要发布此课程, 是否继续?", "提示", {
                confirmButtonText: "确定",
                cancelButtonText: "取消",
                type: "warning",
            }).then(() => {
                course.publishCourse(this.courseId).then(response => {
                //提示信息
                this.$message({
                    message: "课程发布成功",
                    type: "success",
                });
                //跳转课程列表页面
                this.$router.push({ path: "/course/list" });
                });
            });
            }

测试

课程列表功能

1. 课程列表展示功能

EduCourseController

 // 查询课程所有信息
    @GetMapping
    public R getCourseList() {
        List<EduCourse> list = courseService.list(null);
        return R.ok().data("list", list);
    }

定义api

     //课程列表
        getListCourse() {
            return request({
                url: "/eduservice/course/",
                method: 'get',
            })
        },

template

 <!-- 表格 -->
    <el-table
      :data="list"
      border
      fit
      highlight-current-row>

      <el-table-column
        label="序号"
        width="70"
        align="center">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>

      <el-table-column prop="title" label="课程名称" width="200" />

      <el-table-column label="课程状态" width="120">
        <template slot-scope="scope">
          {{ scope.row.status===Normal?'已发布':'未发布' }}
        </template>
      </el-table-column>

      <el-table-column prop="lessonNum" label="课时数" />

      <el-table-column prop="gmtCreate" label="添加时间" width="260"/>

      <el-table-column prop="viewCount" label="浏览数量" width="100" />

      <el-table-column label="操作" 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">编辑课程基本信息</el-button>
          </router-link>
          <router-link :to="'/teacher/edit/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲</el-button>
          </router-link>
          <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

methods方法

 // 课程列表的方法
       getList(page = 1) {
      this.page = page;
      course
        .getListCourse(this.page, this.limit, this.courseQuery)
        .then((response) => {
          //请求成功
          //response接口返回的数据
          this.list = response.data.rows
          this.total = response.data.total
        });
    },

测试

2. 课程列表查询功能

EduCourseController

// 多条件查询课程带分页
    @ApiOperation(value = "多条件查询讲师带分页")
    @PostMapping("pageCourseCondition/{page}/{limit}")
    public R pageTeacherCondition(@ApiParam(name = "page", value = "当前页码", required = true)@PathVariable Long page,
                                  @ApiParam(name = "limit", value = "每页记录数", required = true)@PathVariable Long limit,
                                  // required = false 表示此条件对象可以不传入值
                                  @RequestBody(required = false) CourseQuery courseQuery) {
        // 创建分页page对象
        Page<EduCourse> pageParam = new Page<>(page, limit);

        // 调用方法实现多条件分页查询
        courseService.pageQuery(pageParam, courseQuery);

        // 获取查询到的数据
        List<EduCourse> records = pageParam.getRecords();

        // 获取总记录数
        long total = pageParam.getTotal();
        return R.ok().data("total", total).data("rows", records);
    }

EduCourseService

  // 多条件查询课程带分页
    void pageQuery(Page<EduCourse> pageParam, CourseQuery courseQuery);

EduCourseServiceImpl

 // 多条件查询课程带分页
    @Override
    public void pageQuery(Page<EduCourse> eduCoursePage, CourseQuery courseQuery) {
        QueryWrapper<EduCourse> queryWrapper = new QueryWrapper<>();
        queryWrapper.orderByDesc("gmt_create");
        if(courseQuery==null){
            this.page(eduCoursePage,queryWrapper);
            return;
        }
        String title = courseQuery.getTitle();
        String teacherId = courseQuery.getTeacherId();
        String subjectId = courseQuery.getSubjectId();
        String subjectParentId = courseQuery.getSubjectParentId();
        String status = courseQuery.getStatus();

        if(!StringUtils.isEmpty(title)){
            queryWrapper.like("title",title);
        }
        if(!StringUtils.isEmpty(teacherId)){
            queryWrapper.eq("teacher_id",teacherId);
        }
        if(!StringUtils.isEmpty(status)){
            queryWrapper.eq("status",status);
        }
        if(!StringUtils.isEmpty(subjectId)){
            queryWrapper.eq("subject_id", subjectId);
        }
        if(!StringUtils.isEmpty(subjectParentId)){
            queryWrapper.eq("subject_parent_id", subjectParentId);
        }
        this.page(eduCoursePage,queryWrapper);

    }

定义api

      // 课程列表（条件查询分页）
        getListCourse(page,limit,courseQuery) {
            return request({
                    url: `/eduservice/course/pageCourseCondition/${page}/${limit}`,
                    method: 'post',
                    data:courseQuery
                  })
        },

template

 <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="课程名称" />
      </el-form-item>

      <el-form-item>
        <el-select
          v-model="courseQuery.status"
          clearable
          placeholder="课程状态"
        >
          <el-option value="Normal" label="已发布" />
          <el-option value="Draft" label="未发布" />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-input v-model="courseQuery.teacherId" placeholder="教师id" />
      </el-form-item>

      <el-button type="primary" icon="el-icon-search" @click="getList()"
        >查询</el-button
      >
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

methods方法

 getList(page = 1) {
      this.page = page;
      course
        .getListCourse(this.page, this.limit, this.courseQuery)
        .then((response) => {
          //请求成功
          //response接口返回的数据
          this.list = response.data.rows
          this.total = response.data.total
        });
    },

     resetData() {
          // 清空的方法
          // 表单输入项数据清空
          this.courseQuery = {}
          // 查询所有讲师数据
          this.getList()
     },

测试

3. 课程列表删除课程功能

一、后端实现

controller层
EduCourseController

  // 删除课程
    @DeleteMapping("{courseId}")
    public R deleteCourse(@PathVariable String courseId) {
        courseService.removeCourse(courseId);
        return R.ok();
    }

service层
如果用户确定删除，则首先删除 video 记录，然后删除 chapter 记录，再删除 description 记录，最后删除 Course 记录.

EduVideoService

 // 根据课程id删除小节
    void removeVideoByCourseId(String courseId);

EduVideoServiceImpl

  // 根据课程id删除小节
    @Override
    public void removeVideoByCourseId(String courseId) {
        QueryWrapper<EduVideo> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("course_id", courseId);
        baseMapper.delete(queryWrapper);
    }

EduChapterService

//根据课程id删除章节
    void removeChapterByCourseId(String courseId);

EduChapterServiceImpl

//根据课程id删除章节
    @Override
    public void removeChapterByCourseId(String courseId) {
        QueryWrapper<EduChapter> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("course_id", courseId);
        baseMapper.delete(queryWrapper);
    }

EduCourseService

 // 删除课程
    void removeCourse(String courseId);

EduCourseServiceImpl

   // 删除课程
    @Override
    public void removeCourse(String courseId) {
        // 1.根据课程id删除小节
        // TODO 删除小节，删除对应视频文件
        eduVideoService.removeVideoByCourseId(courseId);

        //2.根据课程id删除章节
        eduChapterService.removeChapterByCourseId(courseId);

        //3.根据课程id删除描述
        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 GuliException(20001, "删除失败");
        }
    }

二、前端实现

定义api

  // 删除课程
        deleteCourseId(id) {
            return request({
                url: `/eduservice/course/${id}`,
                method: 'delete'
            })
        },

template

<el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除</el-button>

methods方法

//删除课程的方法
        removeDataById(id) {
            this.$confirm('此操作将永久删除讲师记录, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                course.deleteCourseId(id)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    //回到列表页面
                    this.getList()
                })
            }) //点击取消，执行catch方法
        }