第一次修改

src/main/java/com/teaching/backend/controller/chapter/ChapterController.java

@@ -76,4 +76,5 @@ public class ChapterController {
                 .count();
         return ResultUtils.success(count);
     }
+
 }

src/main/java/com/teaching/backend/controller/chapter/ChapterController2.java

@@ -0,0 +1,74 @@
+package com.teaching.backend.controller.chapter;
+
+import com.teaching.backend.common.BaseResponse;
+import com.teaching.backend.common.ResultUtils;
+import com.teaching.backend.model.dto.chapter.ChapterDTO;
+import com.teaching.backend.model.entity.chapter.Chapter;
+import com.teaching.backend.service.chapter.IChapterService;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+/**
+ * ClassName: ChapterController2
+ * Package: com.teaching.backend.controller.chapter
+ * Description:
+ *
+ * @Author 姜钧瀚
+ * @Create 2024/7/23 17:16
+ * @Version 1.0
+ */
+@Api(tags = "课程章节管理接口2")
+@RestController
+@RequestMapping("/chapter2")
+public class ChapterController2 {
+
+    @Autowired
+    IChapterService chapterService;
+
+    @ApiOperation("查询全部的章节")
+    @GetMapping("/list")
+    public BaseResponse<List<Chapter>> AllList(){
+        List<Chapter> list= chapterService.list();
+        return ResultUtils.success(list);
+    }
+
+    @ApiOperation("根据课程id查出对应的父子章节")
+    @GetMapping("/chapter")
+public BaseResponse<List<Chapter>> getCourseChapters2(@RequestParam String courseId){
+        return ResultUtils.success(chapterService.getChapterTree(courseId));
+
+    }
+
+
+    @ApiOperation("添加章节")
+    @PostMapping("/add")
+    public BaseResponse<String> addChapter2(@RequestBody ChapterDTO chapterDTO){
+        chapterService.saveChapter(chapterDTO);
+        return ResultUtils.success("添加成功！！！！！！！！");
+    }
+
+    @ApiOperation("删除章节")
+    @DeleteMapping("/delete/{id}")
+    public BaseResponse<String> dlChapter(@PathVariable String id){
+        chapterService.deleteChapter(id);
+        return ResultUtils.success("删除成功");
+    }
+
+
+    @ApiOperation("修改章节")
+    @PutMapping("/update")
+    public BaseResponse<String> udChapter(@RequestBody Chapter chapter){
+
+        chapter.setUpdateTime(LocalDateTime.now());
+         chapterService.updateById(chapter);
+        return ResultUtils.success("修改成功");
+    }
+}
+
+
+

src/main/java/com/teaching/backend/controller/courses/CoursesController2.java

@@ -0,0 +1,91 @@
+package com.teaching.backend.controller.courses;
+
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.teaching.backend.common.BaseResponse;
+import com.teaching.backend.common.ErrorCode;
+import com.teaching.backend.common.ResultUtils;
+import com.teaching.backend.exception.BusinessException;
+import com.teaching.backend.filter.ValidateParams;
+import com.teaching.backend.mapper.courses.CoursesMapper;
+import com.teaching.backend.model.dto.courses.CoursesDTO;
+import com.teaching.backend.model.entity.CourseResources;
+import com.teaching.backend.model.entity.ResourceRelationship;
+import com.teaching.backend.model.entity.courses.Courses;
+import com.teaching.backend.model.vo.courses.CoursesVO;
+import com.teaching.backend.service.courses.ICoursesService;
+import com.teaching.backend.service.resource.ResourcesRelationshipService;
+import io.swagger.annotations.ApiOperation;
+import org.springframework.beans.BeanUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * ClassName: CoursesController2
+ * Package: com.teaching.backend.controller.courses
+ * Description:
+ *
+ * @Author 姜钧瀚
+ * @Create 2024/7/22 17:52
+ * @Version 1.0
+ */
+@RestController
+@RequestMapping("/api/coursesteacher2")
+public class CoursesController2 {
+    @Autowired
+    ICoursesService coursesService;
+    @Autowired
+    ResourcesRelationshipService resourcesRelationshipService;
+
+    @ApiOperation("网站首页2")
+    @GetMapping("/index2")
+    public BaseResponse<Map<String,Object>> getData(@RequestParam("page") int page, @RequestParam("pageSize") int pageSize) {
+        Map<String, Object> result = coursesService.getPagePageSize2(page, pageSize);
+
+        // 将结果放入新的Map对象中返回
+        Map<String, Object> objectMap = new HashMap<>();
+        objectMap.put("content", result.get("courses"));
+        objectMap.put("totalcount", result.get("totalcount"));
+        objectMap.put("totalPages", result.get("totalPages"));
+        objectMap.put("currentPage", result.get("currentPage"));
+
+        return ResultUtils.success(objectMap);
+    }
+
+
+    @ApiOperation("根据id查询课程")
+    @ValidateParams({"id"})
+    @GetMapping("/{id}")
+    public BaseResponse<CoursesDTO> getByIdCourse(@PathVariable String id){
+        if(id==null){
+            throw new BusinessException(ErrorCode.PARAMS_ERROR,"课程id为空");
+        }
+        Courses course = coursesService.getById(id);
+        CoursesDTO coursesDTO = new CoursesDTO();
+        BeanUtils.copyProperties(course,coursesDTO);
+        return ResultUtils.success(coursesDTO);
+    }
+
+    @ApiOperation("点击详情课程根据id查询对应课程的资源")
+    @GetMapping("/resource/{id}")
+    public BaseResponse<List<CourseResources>> getResource(@PathVariable String id) {
+        List<CourseResources> relatedResources = resourcesRelationshipService.getResource(id);
+        return ResultUtils.success(relatedResources);
+    }
+
+    @ApiOperation("点击详情课程根据id和type查询对应课程的资源")
+    @GetMapping("/resource/list")
+    public BaseResponse<List<CourseResources>> getResource2(@RequestParam String id,@RequestParam Integer type) {
+        List<CourseResources> relatedResources = resourcesRelationshipService.getResource2(id,type);
+        return ResultUtils.success(relatedResources);
+    }
+
+    }
+
+
+
+
+

src/main/java/com/teaching/backend/mapper/chapter/ChapterMapper.java

@@ -3,6 +3,10 @@ package com.teaching.backend.mapper.chapter;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.teaching.backend.model.entity.chapter.Chapter;
+import io.lettuce.core.dynamic.annotation.Param;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
 
 /**
  * <p>
@@ -13,5 +17,10 @@ import com.teaching.backend.model.entity.chapter.Chapter;
  * @since 2024-05-31
  */
 public interface ChapterMapper extends BaseMapper<Chapter> {
+    @Select("SELECT * FROM chapter WHERE course_id = #{courseId}")
+    List<Chapter> selectSectionsByCourseId(@Param("courseId") String courseId);
+
+    @Select("SELECT * FROM course_chapter WHERE course_id = #{courseId} AND (pid = #{parentId} )")
+    List<Chapter> selectSectionsWithChildren(@Param("courseId") String courseId, @Param("parentId") String parentId);
 
 }

src/main/java/com/teaching/backend/mapper/courses/CoursesMapper.java

@@ -1,7 +1,10 @@
 package com.teaching.backend.mapper.courses;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.teaching.backend.model.entity.courses.Courses;
+import com.teaching.backend.model.vo.courses.CoursesVO;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 import org.apache.ibatis.annotations.Select;
@@ -21,4 +24,5 @@ public interface CoursesMapper extends BaseMapper<Courses> {
     @Select("SELECT * FROM courses LIMIT #{start}, #{pageSize}")
     List<Courses> getItemsByPage(@Param("start") int start, @Param("pageSize") int pageSize);
 
+
 }

src/main/java/com/teaching/backend/mapper/resource/CourseResourcesMapper.java

@@ -3,6 +3,9 @@ package com.teaching.backend.mapper.resource;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.teaching.backend.model.entity.CourseResources;
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
 
 /**
  * ClassName: FileTableMapper
@@ -15,4 +18,5 @@ import org.apache.ibatis.annotations.Mapper;
  */
 @Mapper
 public interface CourseResourcesMapper extends BaseMapper<CourseResources> {
+
 }

src/main/java/com/teaching/backend/mapper/resource/ResourcesRelationshipMapper.java

@@ -1,6 +1,8 @@
 package com.teaching.backend.mapper.resource;
 
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.teaching.backend.model.entity.CourseResources;
 import com.teaching.backend.model.entity.ResourceRelationship;
 import org.apache.ibatis.annotations.Mapper;
 import org.apache.tomcat.websocket.BackgroundProcess;

src/main/java/com/teaching/backend/model/dto/chapter/ChapterDTO.java

@@ -0,0 +1,89 @@
+package com.teaching.backend.model.dto.chapter;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.xml.soap.Text;
+import java.io.Serializable;
+import java.time.LocalDateTime;
+
+/**
+ * ClassName: ChapterDTO
+ * Package: com.teaching.backend.model.dto.chapter
+ * Description:
+ *
+ * @Author 姜钧瀚
+ * @Create 2024/7/23 23:16
+ * @Version 1.0
+ */
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class ChapterDTO implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    @ApiModelProperty(value = "创建人")
+    private String createBy;
+
+
+    @ApiModelProperty(value = "创建日期")
+    private LocalDateTime createTime;
+
+    @ApiModelProperty(value = "更新人")
+    private String updateBy;
+
+    @ApiModelProperty(value = "更新日期")
+    private LocalDateTime updateTime;
+
+    @ApiModelProperty(value = "所属部门")
+    private String sysOrgCode;
+
+    @ApiModelProperty(value = "序号")
+    private int orderNum;
+
+    @ApiModelProperty(value = "章节名称")
+    private String name;
+
+    @ApiModelProperty(value = "简介")
+    private String content;
+
+    @ApiModelProperty(value = "父章节")
+    private String pid;
+
+    @ApiModelProperty(value = "课程id")
+    private String courseId;
+
+    @ApiModelProperty(value = "课程目标")
+    private String courseObjectivesId;
+
+    @ApiModelProperty(value = "总学时")
+    private String totalClassHours;
+
+    @ApiModelProperty(value = "要求")
+    private String requirement;
+
+
+    @ApiModelProperty(value = "线上学时")
+    private String onlineClassHours;
+
+    @ApiModelProperty(value = "周次")
+    private String zc;
+
+    @ApiModelProperty(value = "资源")
+    private String ziyuan;
+
+    @ApiModelProperty(value = "资源文件")
+    private String zywj;
+
+    @ApiModelProperty(value = "内部序号显示")
+    private String numshow;
+
+
+
+
+}

src/main/java/com/teaching/backend/model/entity/chapter/Chapter.java

@@ -12,6 +12,7 @@ import lombok.experimental.Accessors;
 
 import java.io.Serializable;
 import java.time.LocalDateTime;
+import java.util.List;
 
 /**
  * <p>
@@ -34,77 +35,62 @@ public class Chapter implements Serializable {
     private String id;
 
     @ApiModelProperty(value = "创建人")
-    @TableField("create_by")
     private String createBy;
 
     @ApiModelProperty(value = "创建日期")
-    @TableField("create_time")
     private LocalDateTime createTime;
 
     @ApiModelProperty(value = "更新人")
-    @TableField("update_by")
     private String updateBy;
 
     @ApiModelProperty(value = "更新日期")
-    @TableField("update_time")
     private LocalDateTime updateTime;
 
     @ApiModelProperty(value = "所属部门")
-    @TableField("sys_org_code")
     private String sysOrgCode;
 
     @ApiModelProperty(value = "序号")
-    @TableField("num")
+    private int orderNum;
-    private Integer num;
 
     @ApiModelProperty(value = "名称")
-    @TableField("name")
     private String name;
 
     @ApiModelProperty(value = "简介")
-    @TableField("content")
     private String content;
 
     @ApiModelProperty(value = "父级节点")
-    @TableField("pid")
     private String pid;
 
     @ApiModelProperty(value = "课程")
-    @TableField("courseid")
+
-    private String courseid;
+    private String courseId;
 
     @ApiModelProperty(value = "课程目标")
-    @TableField("courseobjectivesid")
+    private String courseObjectivesId;
-    private String courseobjectivesid;
 
     @ApiModelProperty(value = "总学时")
-    @TableField("totalclasshours")
+    private String totalClassHours;
-    private String totalclasshours;
 
     @ApiModelProperty(value = "要求")
-    @TableField("requirement")
     private String requirement;
 
     @ApiModelProperty(value = "线上学时")
-    @TableField("onlinclasshours")
+    private String onlineClassHours;
-    private String onlinclasshours;
-
 
     @ApiModelProperty(value = "周次")
-    @TableField("zc")
     private String zc;
 
     @ApiModelProperty(value = "资源")
-    @TableField("ziyuan")
     private String ziyuan;
 
     @ApiModelProperty(value = "资源文件")
-    @TableField("zywj")
     private String zywj;
 
     @ApiModelProperty(value = "内部序号显示")
-    @TableField("numshow")
     private String numshow;
 
+    @ApiModelProperty(value = "子章节")
+    @TableField(exist = false)
+    private List<Chapter> children; // 用于存储子章节
 
 }

src/main/java/com/teaching/backend/service/chapter/IChapterService.java

@@ -2,6 +2,7 @@ package com.teaching.backend.service.chapter;
 
 
 import com.baomidou.mybatisplus.extension.service.IService;
+import com.teaching.backend.model.dto.chapter.ChapterDTO;
 import com.teaching.backend.model.entity.chapter.Chapter;
 import com.teaching.backend.model.vo.chapter.ChapterVo;
 
@@ -23,4 +24,12 @@ public interface IChapterService extends IService<Chapter> {
 
 
     Boolean deleteAfterUpdate(String id);
+
+
+    List<Chapter> getChapterTree(String courseId);
+
+
+    void saveChapter(ChapterDTO chapterDTO);
+
+    void deleteChapter(String id);
 }

src/main/java/com/teaching/backend/service/courses/ICoursesService.java

@@ -10,6 +10,7 @@ import com.teaching.backend.model.vo.courses.CoursesVO;
 
 import javax.servlet.http.HttpServletResponse;
 import java.util.List;
+import java.util.Map;
 
 
 /**
@@ -38,4 +39,6 @@ public interface ICoursesService extends IService<Courses> {
     void down(HttpServletResponse response, String id) throws Exception;
 
     CoursesVO getByIdCourseVo(String courseid);
+
+    Map<String, Object> getPagePageSize2(int page, int pageSize);
 }

src/main/java/com/teaching/backend/service/impl/CourseResourcesServiceImpl.java

@@ -39,8 +39,8 @@ import java.util.function.Consumer;
  */
 @Service
 public class CourseResourcesServiceImpl extends ServiceImpl<CourseResourcesMapper, CourseResources> implements CourseResourcesService {
-    @Resource
+//    @Resource
-    ResourcesRelationshipService resourcesRelationshipService;
+//    ResourcesRelationshipService resourcesRelationshipService;
 
     @Autowired
     private CourseResourcesMapper courseResourcesMapper;
@@ -64,7 +64,7 @@ public class CourseResourcesServiceImpl extends ServiceImpl<CourseResourcesMappe
 
         resourcesRelationship.setResourceid(String.valueOf(resourceId));
 
-         resourcesRelationshipService.save(resourcesRelationship);
+//         resourcesRelationshipService.save(resourcesRelationship);
     }
 
     @Override

src/main/java/com/teaching/backend/service/impl/ResourcesRelationshipServiceImpl.java

@@ -1,12 +1,21 @@
 package com.teaching.backend.service.impl;
 
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.teaching.backend.mapper.resource.CourseResourcesMapper;
 import com.teaching.backend.mapper.resource.ResourcesRelationshipMapper;
 import com.teaching.backend.model.entity.CourseResources;
 import com.teaching.backend.model.entity.ResourceRelationship;
+import com.teaching.backend.service.resource.CourseResourcesService;
 import com.teaching.backend.service.resource.ResourcesRelationshipService;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
 /**
  * ClassName: ResourcesRelationshipServiceImpl
  * Package: com.teaching.backend.service.impl
@@ -19,5 +28,57 @@ import org.springframework.stereotype.Service;
 @Service
 public class ResourcesRelationshipServiceImpl extends ServiceImpl<ResourcesRelationshipMapper, ResourceRelationship> implements ResourcesRelationshipService {
 
+@Autowired
+    CourseResourcesService courseResourcesService;
+    @Override
+    public List<CourseResources> getResource(String id) {
+        LambdaQueryWrapper<ResourceRelationship> lambdaQueryWrapper = new LambdaQueryWrapper<>();
+
+        lambdaQueryWrapper.eq(ResourceRelationship::getCourseid, id);
+        List<ResourceRelationship> resourceRelationshipList = this.list(lambdaQueryWrapper);
+
+        List<String> resourceIds = resourceRelationshipList.stream()
+                .map(ResourceRelationship::getResourceid)
+                .collect(Collectors.toList());
+
+        if (!resourceIds.isEmpty()) {
+
+            LambdaQueryWrapper<CourseResources> courseResourcesQueryWrapper = new LambdaQueryWrapper<>();
+            courseResourcesQueryWrapper.in(CourseResources::getId, resourceIds);
+            return courseResourcesService.list(courseResourcesQueryWrapper);
+        }
+
+        return Collections.emptyList();
+    }
+
+    @Override
+    public List<CourseResources> getResource2(String id, Integer type) {
+        LambdaQueryWrapper<ResourceRelationship> lambdaQueryWrapper = new LambdaQueryWrapper<>();
+        lambdaQueryWrapper.eq(ResourceRelationship::getCourseid, id);
+        List<ResourceRelationship> resourceRelationshipList = this.list(lambdaQueryWrapper);
+
+        List<String> resourceIds = resourceRelationshipList.stream()
+                .map(ResourceRelationship::getResourceid)
+                .collect(Collectors.toList());
+if (type==null){
+
+    if (!resourceIds.isEmpty()) {
+
+        LambdaQueryWrapper<CourseResources> courseResourcesQueryWrapper = new LambdaQueryWrapper<>();
+        courseResourcesQueryWrapper.in(CourseResources::getId, resourceIds);
+        return courseResourcesService.list(courseResourcesQueryWrapper);
+    }
+
+}else {
+    LambdaQueryWrapper<CourseResources> courseResourcesQueryWrapper = new LambdaQueryWrapper<>();
+    courseResourcesQueryWrapper.in(CourseResources::getId, resourceIds)
+            .in(CourseResources::getType,type);
+    return courseResourcesService.list(courseResourcesQueryWrapper);
+}
+
+
+        return Collections.emptyList();
+    }
+
 
 }

src/main/java/com/teaching/backend/service/impl/chapter/ChapterServiceImpl.java

@@ -1,19 +1,21 @@
 package com.teaching.backend.service.impl.chapter;
 
 
-import cn.hutool.core.annotation.Link;
 import cn.hutool.core.bean.BeanUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.teaching.backend.common.ErrorCode;
+import com.teaching.backend.exception.BusinessException;
 import com.teaching.backend.mapper.chapter.ChapterMapper;
+import com.teaching.backend.model.dto.chapter.ChapterDTO;
 import com.teaching.backend.model.entity.chapter.Chapter;
 import com.teaching.backend.model.vo.chapter.ChapterVo;
-import com.teaching.backend.model.vo.courses.CoursesVO;
 import com.teaching.backend.service.chapter.IChapterService;
-import org.jetbrains.annotations.TestOnly;
+import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.time.LocalDateTime;
 import java.util.*;
 import java.util.stream.Collectors;
 
@@ -34,14 +36,15 @@ public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> impl
     public String updateNumShow(Chapter chapter) {
 
         String finalNumShow;
-        String courseid = chapter.getCourseid();
+        String courseid = chapter.getCourseId();
         String pid = chapter.getPid();
         LambdaQueryWrapper<Chapter> wrapper = new LambdaQueryWrapper<>();
         Long countChapter ;
 //        pid为0时，说明为章
         if("0".equals(pid)|| "".equals(pid)){
-            wrapper.eq(Chapter::getCourseid,courseid);
+            wrapper.eq(Chapter::getCourseId,courseid);
             countChapter = chapterMapper.selectCount(wrapper);
+
             finalNumShow=String.valueOf(countChapter+1);
 //            chapter.setNumshow(String.valueOf(countChapter+1));
 //            System.out.println(chapter.getNumshow());
@@ -51,7 +54,7 @@ public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> impl
             String parentNumShow =chapter1.getNumshow();
             System.out.println("909090");
             System.out.println(parentNumShow);
-            wrapper.eq(Chapter::getCourseid,courseid)
+            wrapper.eq(Chapter::getCourseId,courseid)
                     .eq(Chapter::getPid,pid);
             countChapter = chapterMapper.selectCount(wrapper);
             System.out.println("-=-=-=-=-="+countChapter);
@@ -79,7 +82,7 @@ public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> impl
     @Override
     public LinkedList<Chapter> getCourseChapter(String courseid) {
         LambdaQueryWrapper<Chapter> wrapper = new LambdaQueryWrapper<>();
-        wrapper.eq(Chapter::getCourseid,courseid)
+        wrapper.eq(Chapter::getCourseId,courseid)
                 .orderByAsc(Chapter::getNumshow);
         List<Chapter> list = chapterMapper.selectList(wrapper);
         LinkedList<Chapter> linkedList = new LinkedList<>(list);
@@ -91,7 +94,7 @@ public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> impl
 //        LinkedList<Chapter> list = new LinkedList<>();
 //       获得所有的节，并按顺序进行排列
         LambdaQueryWrapper<Chapter> wrapper = new LambdaQueryWrapper<>();
-        wrapper.eq(Chapter::getCourseid,courseid)
+        wrapper.eq(Chapter::getCourseId,courseid)
                 .like(Chapter::getNumshow,"-")
                 .orderByAsc(Chapter::getNumshow);
         List<Chapter> prelist = chapterMapper.selectList(wrapper);
@@ -99,7 +102,7 @@ public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> impl
         System.out.println(prelist);
 //        获得所有的章节信息
         LambdaQueryWrapper<Chapter> wrapper1 = new LambdaQueryWrapper<>();
-        wrapper1.eq(Chapter::getCourseid,courseid)
+        wrapper1.eq(Chapter::getCourseId,courseid)
                 .notLike(Chapter::getNumshow,"-")
                 .orderByAsc(Chapter::getNumshow);
         List<Chapter> chapterList = chapterMapper.selectList(wrapper1);
@@ -140,17 +143,114 @@ public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> impl
     public Boolean deleteAfterUpdate(String id) {
         Chapter chapter = chapterMapper.selectById(id);
         String numshow = chapter.getNumshow();
-        String courseid = chapter.getCourseid();
+        String courseid = chapter.getCourseId();
+
         updateNumShow(numshow, courseid);
         chapterMapper.deleteById(id);
 
 
         return true;
     }
+
+    @Override
+    public List<Chapter> getChapterTree(String courseId) {
+        System.out.println(courseId);
+
+            List<Chapter> chapters=baseMapper.selectSectionsByCourseId(courseId);
+        System.out.println(chapters);
+            Map<String,Chapter> chapterMap=new HashMap<>();
+
+            List<Chapter> roots=new ArrayList<>();
+
+            for (Chapter chapter:chapters){
+
+                chapter.setChildren(new ArrayList<>());
+
+                chapterMap.put(chapter.getId(),chapter);
+
+            }
+        System.out.println(chapterMap);
+
+            for (Chapter chapter:chapters){
+                String parentId=chapter.getPid();
+                if (parentId!=null){
+                    Chapter parentChapter=chapterMap.get(parentId);
+                    if (parentChapter != null) {
+                        parentChapter.getChildren().add(chapter);
+                    }
+
+                }else {
+                    roots.add(chapter);
+                }
+            }
+        System.out.println(roots);
+            return roots;
+        }
+
+    @Override
+    public void saveChapter(ChapterDTO chapterDTO) {
+
+        Chapter chapter = new Chapter();
+        try {
+            BeanUtils.copyProperties(chapterDTO, chapter);
+        } catch (Exception e) {
+            throw new RuntimeException("复制数据出错", e);
+        }
+        System.out.println(chapter);
+        String pid = chapter.getPid();
+
+        if (pid == null || pid.isEmpty()) {
+
+            System.out.println("这是新增的一个父节点");
+
+            chapter.setCreateTime(LocalDateTime.now());
+            chapter.setUpdateTime(LocalDateTime.now());
+
+            this.save(chapter);
+        } else {
+            System.out.println("这是新增的一个子节点");
+
+            Chapter parentChapter = this.getById(pid);
+            if (parentChapter != null) {
+
+                parentChapter.setUpdateTime(LocalDateTime.now());
+                this.updateById(parentChapter);
+
+                chapter.setCreateTime(LocalDateTime.now());
+                chapter.setUpdateTime(LocalDateTime.now());
+                this.save(chapter);
+            } else {
+                throw new BusinessException(ErrorCode.PARAMS_ERROR,"未找到父章节，ID 为: " + pid);
+            }
+        }
+    }
+
+    @Override
+    public void deleteChapter(String id) {
+        if (id==null||id.isEmpty()){
+            throw new BusinessException(ErrorCode.PARAMS_ERROR,"请求参数不能为空");
+        }
+        LambdaQueryWrapper<Chapter>queryWrapper=new LambdaQueryWrapper<>();
+        queryWrapper.eq(Chapter::getId,id);
+
+
+        LambdaQueryWrapper<Chapter>lambdaQueryWrapper=new LambdaQueryWrapper<>();
+        lambdaQueryWrapper.eq(Chapter::getPid,id);
+         Long count= this.count(lambdaQueryWrapper);
+
+         if (count>0){
+             throw new BusinessException(ErrorCode.OPERATION_ERROR,"存在子章节，无法删除");
+         }
+         this.remove(queryWrapper);
+
+
+    }
+
+
     public void updateNumShow(String numshow, String courseid){
 //        查询课程章节 getCourseChapter
         LambdaQueryWrapper<Chapter> wrapper = new LambdaQueryWrapper<>();
-        wrapper.eq(Chapter::getCourseid,courseid)
+        wrapper.eq(Chapter::getCourseId,courseid)
                 .orderByAsc(Chapter::getNumshow);
         List<Chapter> chapterList = chapterMapper.selectList(wrapper);
         System.out.println("0-0-0-0-00-------");

src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java

@@ -43,7 +43,6 @@ import java.math.BigDecimal;
 import java.time.LocalDateTime;
 import java.util.*;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 /**
  * <p>
@@ -59,6 +58,7 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     @Autowired
     private CourseObjectivesServiceImpl objectivesService;
 
+
     @Autowired
     ChapterMapper chapterMapper;
 
@@ -304,6 +304,7 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     @Override
     public CoursesVO getByIdCourseVo(String courseid) {
         Courses courses = coursesMapper.selectById(courseid);
+
         CoursesVO coursesVO = BeanUtil.copyProperties(courses,CoursesVO.class);
         coursesVO.setTotalchapter(countChapters(courseid));
         coursesVO.setTotalHours(countHours(courseid));
@@ -314,6 +315,43 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
         return coursesVO;
     }
 
+    @Override
+    public Map<String, Object> getPagePageSize2(int page, int pageSize) {
+    Page<Courses> pageInfo=new Page<>(page,pageSize);
+
+    LambdaQueryWrapper<Courses> queryWrapper=new LambdaQueryWrapper<>();
+
+    this.page(pageInfo,queryWrapper);
+
+    List<Courses> list=pageInfo.getRecords();
+
+
+        List<CoursesVO> coursesVo = BeanUtil.copyToList(list, CoursesVO.class);
+
+
+        coursesVo = coursesVo.stream().map((item) -> {
+
+            item.setTotalHours(countHours(item.getId()));
+            item.setTotalchapter(countChapters(item.getId()));
+            item.setTotalKnow(countKnow(item.getId()));
+            return item;
+        }).collect(Collectors.toList());
+
+        // 获取总记录数和总页数
+        long totalcount = pageInfo.getTotal();
+        long totalPages = pageInfo.getPages();
+
+        // 将总记录数和总页数放入Map中返回
+        Map<String, Object> result = new HashMap<>();
+        result.put("courses", coursesVo);
+        result.put("totalcount", totalcount);
+        result.put("totalPages", totalPages);
+        result.put("currentPage", page);
+
+        return result;
+
+    }
+
     @Override
     public List<CoursesVO> getPagePageSize(int page, int pageSize) {
         int startIndex = (page-1) * pageSize;
@@ -341,12 +379,12 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     //    计算课程已分配的学时 计算章的学时（即已包含了小节的学时）
     public int countChaptersHours(String courseid){
         LambdaQueryWrapper<Chapter> wrapper = new LambdaQueryWrapper<>();
-        wrapper.eq(Chapter::getCourseid,courseid)
+        wrapper.eq(Chapter::getCourseId,courseid)
                 .like(Chapter::getNumshow,"-");
         List<Chapter> list = chapterMapper.selectList(wrapper);
         int total=0;
         for (Chapter sum: list){
-            String totalclasshours = sum.getTotalclasshours();
+            String totalclasshours = sum.getTotalClassHours();
             total= total+Integer.parseInt(totalclasshours);
         }
 //        System.out.println(size);
@@ -354,8 +392,9 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     }
     //    计算课程总章节
     public int countChapters(String courseid){
+
         LambdaQueryWrapper<Chapter> wrapper = new LambdaQueryWrapper<>();
-        wrapper.eq(Chapter::getCourseid,courseid);
+        wrapper.eq(Chapter::getCourseId,courseid);
         List<Chapter> list = chapterMapper.selectList(wrapper);
         int size = list.size();
 //        System.out.println(size);

src/main/java/com/teaching/backend/service/resource/ResourcesRelationshipService.java

@@ -4,6 +4,8 @@ import com.baomidou.mybatisplus.extension.service.IService;
 import com.teaching.backend.model.entity.CourseResources;
 import com.teaching.backend.model.entity.ResourceRelationship;
 
+import java.util.List;
+
 
 /**
  * ClassName: ResourcesRelationshipService
@@ -17,4 +19,7 @@ import com.teaching.backend.model.entity.ResourceRelationship;
 public interface ResourcesRelationshipService extends IService<ResourceRelationship> {
 
 
+    List<CourseResources> getResource(String id);
+
+    List<CourseResources> getResource2(String id, Integer type);
 }