3.3 内容管理模块 - 课程计划

深碍√TFBOYSˉ_ 2024-02-05 16:32 6阅读 0赞

#### 文章目录 ####

*  内容管理模块 - 课程计划
 *  一、介绍
 *   *  1.1 需求分析
     *  1.2 数据模型
     *   *  1.2.1 课程计划teachplan表
         *  1.2.2 teachplan\_media 课程计划视频关联表
 *  二、查询课程计划
 *   *  2.1 查询课程计划
     *  2.2 课程计划Dto
     *  2.3 TeachplanMapper
     *  2.4 TeachplanServiceImpl
     *  2.5 TeachPlanController
 *  三、新增/修改章节内容
 *   *  3.1 新增/修改章节
     *  3.2 SaveTeachplanDto
     *  3.3 TeachplanServiceImpl
     *  3.3 TeachPlanController
     *  3.4 测试

## 内容管理模块 - 课程计划 ##

## 一、介绍 ##

**这一步是修改课程下一步展示的信息**

![image-20231215233053305][]

### 1.1 需求分析 ###

"修改课程"中点击“保存并进行下一步”就会出现下图的页面

很简单的可以看出也是一个树形接口，一个大章节里面有许多的小章节

![image-20231215233012793][]

### 1.2 数据模型 ###

#### 1.2.1 课程计划teachplan表 ####

**teachplan表**

![image-20231215233251179][]

> grade字段就是章节等级
> 
> parentid是课程计划的父级id
> 
> media\_type字段是说明将来这个课程是视频的形式还是文档的形式，也就是媒体类型

![image-20231215233459273][]

![image-20231215233447977][]

/**
     * <p>
     * 课程计划
     * </p>
     *
     * @author itcast
     */
    @Data
    @TableName("teachplan")
    public class Teachplan implements Serializable {
        
    
        private static final long serialVersionUID = 1L;
    
        @TableId(value = "id", type = IdType.AUTO)
        private Long id;
    
        /**
         * 课程计划名称
         */
        private String pname;
    
        /**
         * 课程计划父级Id
         */
        private Long parentid;
    
        /**
         * 层级，分为1、2、3级
         */
        private Integer grade;
    
        /**
         * 课程类型:1视频、2文档
         */
        private String mediaType;
    
        /**
         * 开始直播时间
         */
        private LocalDateTime startTime;
    
        /**
         * 直播结束时间
         */
        private LocalDateTime endTime;
    
        /**
         * 章节及课程时介绍
         */
        private String description;
    
        /**
         * 时长，单位时:分:秒
         */
        private String timelength;
    
        /**
         * 排序字段
         */
        private Integer orderby;
    
        /**
         * 课程标识
         */
        private Long courseId;
    
        /**
         * 课程发布标识
         */
        private Long coursePubId;
    
        /**
         * 状态（1正常  0删除）
         */
        private Integer status;
    
        /**
         * 是否支持试学或预览（试看）
         */
        private String isPreview;
    
        /**
         * 创建时间
         */
        @TableField(fill = FieldFill.INSERT)
        private LocalDateTime createDate;
    
        /**
         * 修改时间
         */
        @TableField(fill = FieldFill.INSERT_UPDATE)
        private LocalDateTime changeDate;
    
    
    }

#### 1.2.2 teachplan\_media 课程计划视频关联表 ####

**课程计划如如果是关联视频的话有一张单独的表teachplan\_media**

media\_id和teachplan\_id是这张表的重点

> 为什么这样表中会有course\_id课程id?
> 
> 也很好理解，标识一下这段视频属于哪个课程的

![image-20231215234310927][]

![image-20231215234324378][]

/**
     * <p>
     * 
     * </p>
     *
     * @author itcast
     */
    @Data
    @TableName("teachplan_media")
    public class TeachplanMedia implements Serializable {
        
    
        private static final long serialVersionUID = 1L;
    
        /**
         * 主键
         */
        @TableId(value = "id", type = IdType.AUTO)
        private Long id;
    
        /**
         * 媒资文件id
         */
        private String mediaId;
    
        /**
         * 课程计划标识
         */
        private Long teachplanId;
    
        /**
         * 课程标识
         */
        private Long courseId;
    
        /**
         * 媒资文件原始名称
         */
        @TableField("media_fileName")
        private String mediaFilename;
    
        @TableField(fill = FieldFill.INSERT)
        private LocalDateTime createDate;
    
        /**
         * 创建人
         */
        private String createPeople;
    
        /**
         * 修改人
         */
        private String changePeople;
    
    
    }

## 二、查询课程计划 ##

### 2.1 查询课程计划 ###

我们最终要实现这种形式

![image-20231216202948772][]

要完成如下形式的数据

[
        {
        
            "id":268,
            "pname":"1.配置管理",
            "parentid":0,
            "grade":1,
            "mediaType":null,
            "startTime":null,
            "endTime":null,
            "description":null,
            "timelength":null,
            "orderby":1,
            "courseId":117,
            "coursePubId":null,
            "status":null,
            "isPreview":null,
            "createDate":null,
            "changeDate":null,
            "teachplanMedia":null,
            "teachPlanTreeNodes":[
                {
        
                    "id":269,
                    "pname":"1.1 什么是配置中心",
                    "parentid":null,
                    "grade":2,
                    "mediaType":null,
                    "startTime":null,
                    "endTime":null,
                    "description":null,
                    "timelength":null,
                    "orderby":1,
                    "courseId":117,
                    "coursePubId":null,
                    "status":null,
                    "isPreview":null,
                    "createDate":null,
                    "changeDate":null,
                    "teachplanMedia":{
        
                        "id":40,
                        "mediaId":"3a5a861d1c745d05166132c47b44f9e4",
                        "teachplanId":null,
                        "courseId":null,
                        "mediaFilename":"01-Nacos配置管理-内容介绍.avi",
                        "createDate":null,
                        "createPeople":null,
                        "changePeople":null
                    },
                    "teachPlanTreeNodes":null
                },
                {
        
                    "id":270,
                    "pname":"1.2Nacos简介",
                    "parentid":null,
                    "grade":2,
                    "mediaType":null,
                    "startTime":null,
                    "endTime":null,
                    "description":null,
                    "timelength":null,
                    "orderby":2,
                    "courseId":117,
                    "coursePubId":null,
                    "status":null,
                    "isPreview":null,
                    "createDate":null,
                    "changeDate":null,
                    "teachplanMedia":{
        
                        "id":41,
                        "mediaId":"23f83ae728bd1269eee7ea2236e79644",
                        "teachplanId":null,
                        "courseId":null,
                        "mediaFilename":"16-Nacos配置管理-课程总结.avi",
                        "createDate":null,
                        "createPeople":null,
                        "changePeople":null
                    },
                    "teachPlanTreeNodes":null
                },
                {
        
                    "id":271,
                    "pname":"1.3安装Nacos Server",
                    "parentid":null,
                    "grade":2,
                    "mediaType":null,
                    "startTime":null,
                    "endTime":null,
                    "description":null,
                    "timelength":null,
                    "orderby":3,
                    "courseId":117,
                    "coursePubId":null,
                    "status":null,
                    "isPreview":null,
                    "createDate":null,
                    "changeDate":null,
                    "teachplanMedia":{
        
                        "id":42,
                        "mediaId":"3a5a861d1c745d05166132c47b44f9e4",
                        "teachplanId":null,
                        "courseId":null,
                        "mediaFilename":"01-Nacos配置管理-内容介绍.avi",
                        "createDate":null,
                        "createPeople":null,
                        "changePeople":null
                    },
                    "teachPlanTreeNodes":null
                },
                {
        
                    "id":272,
                    "pname":"1.4Nacos配置入门",
                    "parentid":null,
                    "grade":2,
                    "mediaType":null,
                    "startTime":null,
                    "endTime":null,
                    "description":null,
                    "timelength":null,
                    "orderby":4,
                    "courseId":117,
                    "coursePubId":null,
                    "status":null,
                    "isPreview":null,
                    "createDate":null,
                    "changeDate":null,
                    "teachplanMedia":{
        
                        "id":43,
                        "mediaId":"3a5a861d1c745d05166132c47b44f9e4",
                        "teachplanId":null,
                        "courseId":null,
                        "mediaFilename":"01-Nacos配置管理-内容介绍.avi",
                        "createDate":null,
                        "createPeople":null,
                        "changePeople":null
                    },
                    "teachPlanTreeNodes":null
                },
                {
        
                    "id":273,
                    "pname":"1.5命名空间管理",
                    "parentid":null,
                    "grade":2,
                    "mediaType":null,
                    "startTime":null,
                    "endTime":null,
                    "description":null,
                    "timelength":null,
                    "orderby":5,
                    "courseId":117,
                    "coursePubId":null,
                    "status":null,
                    "isPreview":null,
                    "createDate":null,
                    "changeDate":null,
                    "teachplanMedia":{
        
                        "id":44,
                        "mediaId":"23f83ae728bd1269eee7ea2236e79644",
                        "teachplanId":null,
                        "courseId":null,
                        "mediaFilename":"16-Nacos配置管理-课程总结.avi",
                        "createDate":null,
                        "createPeople":null,
                        "changePeople":null
                    },
                    "teachPlanTreeNodes":null
                }
            ]
        },
        {
        
            "id":274,
            "pname":"2.服务发现",
            "parentid":0,
            "grade":1,
            "mediaType":null,
            "startTime":null,
            "endTime":null,
            "description":null,
            "timelength":null,
            "orderby":2,
            "courseId":117,
            "coursePubId":null,
            "status":null,
            "isPreview":null,
            "createDate":null,
            "changeDate":null,
            "teachplanMedia":null,
            "teachPlanTreeNodes":[
                {
        
                    "id":275,
                    "pname":"2.1什么是服务发现",
                    "parentid":null,
                    "grade":2,
                    "mediaType":null,
                    "startTime":null,
                    "endTime":null,
                    "description":null,
                    "timelength":null,
                    "orderby":1,
                    "courseId":117,
                    "coursePubId":null,
                    "status":null,
                    "isPreview":null,
                    "createDate":null,
                    "changeDate":null,
                    "teachplanMedia":{
        
                        "id":45,
                        "mediaId":"1f229319d6fed3431d2f9d06193a433b",
                        "teachplanId":null,
                        "courseId":null,
                        "mediaFilename":"01-分布式事务专题课程介绍.avi",
                        "createDate":null,
                        "createPeople":null,
                        "changePeople":null
                    },
                    "teachPlanTreeNodes":null
                },
                {
        
                    "id":276,
                    "pname":"2.2服务发现快速入门",
                    "parentid":null,
                    "grade":2,
                    "mediaType":null,
                    "startTime":null,
                    "endTime":null,
                    "description":null,
                    "timelength":null,
                    "orderby":2,
                    "courseId":117,
                    "coursePubId":null,
                    "status":null,
                    "isPreview":null,
                    "createDate":null,
                    "changeDate":null,
                    "teachplanMedia":{
        
                        "id":46,
                        "mediaId":"6ad24a762f67c18f61966c1b8c55abe6",
                        "teachplanId":null,
                        "courseId":null,
                        "mediaFilename":"07-分布式事务基础理论-BASE理论.avi",
                        "createDate":null,
                        "createPeople":null,
                        "changePeople":null
                    },
                    "teachPlanTreeNodes":null
                },
                {
        
                    "id":277,
                    "pname":"2.3服务发现数据模型",
                    "parentid":null,
                    "grade":2,
                    "mediaType":null,
                    "startTime":null,
                    "endTime":null,
                    "description":null,
                    "timelength":null,
                    "orderby":3,
                    "courseId":117,
                    "coursePubId":null,
                    "status":null,
                    "isPreview":null,
                    "createDate":null,
                    "changeDate":null,
                    "teachplanMedia":{
        
                        "id":47,
                        "mediaId":"1f229319d6fed3431d2f9d06193a433b",
                        "teachplanId":null,
                        "courseId":null,
                        "mediaFilename":"01-分布式事务专题课程介绍.avi",
                        "createDate":null,
                        "createPeople":null,
                        "changePeople":null
                    },
                    "teachPlanTreeNodes":null
                },
                {
        
                    "id":278,
                    "pname":"2.4服务列表管理",
                    "parentid":null,
                    "grade":2,
                    "mediaType":null,
                    "startTime":null,
                    "endTime":null,
                    "description":null,
                    "timelength":null,
                    "orderby":4,
                    "courseId":117,
                    "coursePubId":null,
                    "status":null,
                    "isPreview":null,
                    "createDate":null,
                    "changeDate":null,
                    "teachplanMedia":{
        
                        "id":48,
                        "mediaId":"6ad24a762f67c18f61966c1b8c55abe6",
                        "teachplanId":null,
                        "courseId":null,
                        "mediaFilename":"07-分布式事务基础理论-BASE理论.avi",
                        "createDate":null,
                        "createPeople":null,
                        "changePeople":null
                    },
                    "teachPlanTreeNodes":null
                }
            ]
        }
    ]

### 2.2 课程计划Dto ###

首先定义一个查询课程计划返回的Dto表

@Data
    @ToString
    public class TeachplanDto extends Teachplan {
        
        private static final long serialVersionUID = 1586804545070538974L;
        
        //课程计划关联的媒资信息
        private TeachplanMedia teachplanMedia;
        
        //子节点
        private List<TeachplanDto> teachPlanTreeNodes;
        
    }

### 2.3 TeachplanMapper ###

**完成课程计划查询的树状结构**

> 我们在本篇文章中的“课程分类”有介绍树状结构查询，可以重新看看

public interface TeachplanMapper extends BaseMapper<Teachplan> {
        
    
        //课程计划查询 - 树状结构
        public List<TeachplanDto> selectTreeNodes(@Param("courseId") Long courseId);
    
    }

<resultMap id="treeNodeResultMap" type="com.xuecheng.content.model.dto.TeachplanDto">
    
            <id column="one_id" property="id"/>
            <result column="one_pname" property="pname"/>
            <result column="one_parentid" property="parentid"/>
            <result column="one_grade" property="grade"/>
            <result column="one_mediaType" property="mediaType"/>
            <result column="one_stratTime" property="startTime"/>
            <result column="one_endTime" property="endTime"/>
            <result column="one_orderby" property="orderby"/>
            <result column="one_courseId" property="courseId"/>
            <result column="one_coursePubId" property="coursePubId"/>
            
            <collection property="teachPlanTreeNodes" ofType="com.xuecheng.content.model.dto.TeachplanDto">
                <id column="two_id" property="id"/>
                <result column="two_pname" property="pname"/>
                <result column="two_parentid" property="parentid"/>
                <result column="two_grade" property="grade"/>
                <result column="two_mediaType" property="mediaType"/>
                <result column="two_stratTime" property="startTime"/>
                <result column="two_endTime" property="endTime"/>
                <result column="two_orderby" property="orderby"/>
                <result column="two_courseId" property="courseId"/>
                <result column="two_coursePubId" property="coursePubId"/>
                
                <association property="teachplanMedia" javaType="com.xuecheng.content.model.po.TeachplanMedia">
                    <id column="teachplanMeidaId" property="id"/>
                    <result column="mediaFilename" property="mediaFilename"/>
                    <result column="mediaId" property="mediaId"/>
                </association>
            </collection>
    
        </resultMap>
    
    
        <select id="selectTreeNodes" resultMap="treeNodeResultMap">
    
            select one.id            one_id,
                   one.pname         one_pname,
                   one.parentid      one_parentid,
                   one.grade         one_grade,
                   one.media_type    one_mediaType,
                   one.start_time    one_startTime,
                   one.end_time      one_endTime,
                   one.orderby       one_orderby,
                   one.course_id     one_courseId,
                   one.course_pub_id one_coursePubId,
    
                   two.id            two_id,
                   two.pname         two_pname,
                   two.grade         two_grade,
                   two.media_type    two_mediaType,
                   two.start_time    two_startTime,
                   two.end_time      two_endTime,
                   two.orderby       two_orderby,
                   two.course_id     two_courseId,
                   two.course_pub_id two_coursePubId,
    
                   m1.media_fileName mediaFilename,
                   m1.id             teachplanMeidaId,
                   m1.media_id       mediaId
    
            FROM teachplan one
                     LEFT JOIN teachplan two on two.parentid = one.id
                     LEFT JOIN teachplan_media m1 on two.id = m1.teachplan_id
    
            where one.parentid = 0
              and one.course_id = #{courseId}
    
    
        </select>

### 2.4 TeachplanServiceImpl ###

@Service
    public class TeachplanServiceImpl implements TeachplanService {
        
    
        @Autowired
        private TeachplanMapper teachplanMapper;
    
        /**
         * 查询课程计划树形结构
         * @param courseId 课程id
         * @return 课程计划树形结构
         */
        @Override
        public List<TeachplanDto> findTeachplanTree(long courseId) {
        
            return teachplanMapper.selectTreeNodes(courseId);
        }
    }

### 2.5 TeachPlanController ###

/**
     * 课程计划相关接口
     */
    @Api(value = "课程计划编辑接口",tags = "课程计划编辑接口")
    @RestController
    public class TeachPlanController {
        
    
        @Autowired
        private TeachplanServiceImpl teachplanService;
        
        //查询课程计划
        @ApiOperation("查询课程计划树形结构")
        @GetMapping("/teachplan/{courseId}/tree-nodes")
        //针对参数进行说明
        @ApiImplicitParam(value = "courseId",name = "课程id",required = true,dataType = "Long",paramType = "path")
        public List<TeachplanDto> getTreeNodes(@PathVariable Long courseId) {
        
            return teachplanService.findTeachplanTree(courseId);
        }
    }

## 三、新增/修改章节内容 ##

### 3.1 新增/修改章节 ###

![image-20231216210056412][]

**下面圈出来的地方“添加章”是一级章节**

![image-20231216204015027][]

**下面所示圈出来的地方是添加小章节，也就是二级**

![image-20231216205005853][]

**修改一二级章节只需要点击就可以修改，当鼠标点击其他位置（文本框失去焦点时）就可以将修改的内容保存**

![0c44fcefaab764f35013ef6bca59cf4f.png][]

### 3.2 SaveTeachplanDto ###

/**
     * @description 新增大章节、小章节、修改章节信息
     */
    @Data
    public class SaveTeachplanDto {
        
    
        /***
         * 教学计划id
         */
        private Long id;
    
        /**
         * 课程计划名称
         */
        private String pname;
    
        /**
         * 课程计划父级Id
         */
        private Long parentid;
    
        /**
         * 层级，分为1、2、3级
         */
        private Integer grade;
    
        /**
         * 课程类型:1视频、2文档
         */
        private String mediaType;
    
    
        /**
         * 课程标识
         */
        private Long courseId;
    
        /**
         * 课程发布标识
         */
        private Long coursePubId;
    
    
        /**
         * 是否支持试学或预览（试看）
         */
        private String isPreview;
    }

### 3.3 TeachplanServiceImpl ###

/**
         * 新增/修改/保存课程计划
         *
         * @param saveTeachplanDto
         */
        @Override
        public void saveTeachplan(SaveTeachplanDto saveTeachplanDto) {
        
            //通过课程计划id判断是新增还是修改（新增新增课程的时候不会有id）
            //教学计划id
            Long teachplanId = saveTeachplanDto.getId();
            if (teachplanId == null) {
        
                //新增
                Teachplan teachplan = new Teachplan();
                BeanUtils.copyProperties(saveTeachplanDto, teachplan);
                //确定排序的字段
                // 大章节的添加： 查询某个课程id下有多少个大章节即可
                // select count(1) from teachplan where course_id = 117 and parentid = 0
                // 小章节的添加：（我们只需要找到同级节点有几个即可，也就是parentId相同的就是同级的）
                //select count(1) from teachplan where course_id = 117 and parentid = 父级id
                Long parentId = saveTeachplanDto.getParentid();
                Long courseId = saveTeachplanDto.getCourseId();
                int count = this.getTeachplanCount(courseId, parentId);
                // 确定排序字段
                teachplan.setOrderby(count + 1);
    
                teachplanMapper.insert(teachplan);
            } else {
        
                //修改
                Teachplan teachplan = teachplanMapper.selectById(teachplanId);
                //将要修改的参数复制到teachplan里
                BeanUtils.copyProperties(saveTeachplanDto, teachplan);
                teachplanMapper.updateById(teachplan);
            }
    
        }
    }
    
        private int getTeachplanCount(long courseId, long parentId) {
        
    
            LambdaQueryWrapper<Teachplan> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(Teachplan::getCourseId, courseId)
                    .eq(Teachplan::getParentid, parentId);
            return teachplanMapper.selectCount(queryWrapper);
        }

### 3.3 TeachPlanController ###

@ApiOperation("课程计划创建或修改")
    @PostMapping("/teachplan")
    public void saveTeachplan(@RequestBody SaveTeachplanDto teachplanDto){
        
        teachplanService.saveTeachplan(teachplanDto);
    }

### 3.4 测试 ###

**修改一级菜单、二级菜单、是否免费**

**初始时**

![image-20231216235620261][]

**修改后**

![image-20231216235715602][]

--------------------

**新增一级菜单**

![image-20231217002433534][]

**新增二级菜单**

![image-20231217000004794][]

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