8.7

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

@@ -1,15 +1,21 @@
 package com.teaching.backend.controller.chapter;
 
+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.model.dto.chapter.ChapterDTO;
 import com.teaching.backend.model.entity.chapter.Chapter;
 import com.teaching.backend.service.chapter.IChapterService;
+import com.teaching.backend.service.impl.chapter.ChapterExcelServiceImpl;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
 
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
 import java.time.LocalDateTime;
 import java.util.List;
 
@@ -29,21 +35,29 @@ public class ChapterController2 {
 
     @Autowired
     IChapterService chapterService;
+    @Autowired
+    ChapterExcelServiceImpl chapterExcelService;
 
     @ApiOperation("查询全部的章节")
     @GetMapping("/list")
-    public BaseResponse<List<Chapter>> AllList(){
+    public BaseResponse<Page<Chapter>> AllList(@RequestParam(value = "page",defaultValue = "1") int page,
-        List<Chapter> list= chapterService.list();
+                                               @RequestParam(value = "pageSize",defaultValue = "5") int pageSize){
-        return ResultUtils.success(list);
+        return ResultUtils.success(chapterService.getAllChapters(page,pageSize));
     }
 
+
     @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("根据课程id查出对应的详细章节信息")
+    @GetMapping("/select/chapter/{chapterId}")
+    public BaseResponse<Chapter>selectChapter(@PathVariable Long chapterId){
+        return ResultUtils.success(chapterService.selectChapter(chapterId));
+
+    }
 
     @ApiOperation("添加章节")
     @PostMapping("/add")
@@ -65,7 +79,36 @@ public BaseResponse<List<Chapter>> getCourseChapters2(@RequestParam String cours
         return ResultUtils.success("删除成功");
     }
 
+    @ApiOperation("下载Excel模版")
+    @GetMapping("/downExcel")
+    public void downExcel2(HttpServletResponse response) throws IOException {
+        chapterService.downExcel(response);
+    }
+
 
+    @ApiOperation("导入excel")
+    @PostMapping("/uploadExcel")
+    public BaseResponse<String> addChapter3(MultipartFile file, String courseId) {
+        try {
+            List<String> validationErrors = chapterExcelService.uploadExcel(file, courseId);
+            if (!validationErrors.isEmpty()) {
+                StringBuilder errorMessage = new StringBuilder();
+                for (String error : validationErrors) {
+                    errorMessage.append(error).append("\n");
+                }
+                return ResultUtils.error(ErrorCode.OPERATION_ERROR, errorMessage.toString());
+            } else {
+                return ResultUtils.success("添加成功！！！！！！！！");
+            }
+        } catch (Exception e) {
+            return ResultUtils.error(ErrorCode.SYSTEM_ERROR, "系统错误: " + e.getMessage());
+        }
+    }
+    @ApiOperation("导出数据")
+    @GetMapping(value = "/downLoadExcel")
+    public void downLoadXlsx(HttpServletResponse response,String courseId) throws Exception{
+        chapterService.downLoadXlsx(response,courseId);
+    }
     @ApiOperation("修改章节")
     @PutMapping("/update")
     public BaseResponse<String> udChapter(@RequestBody Chapter chapter){

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

@@ -5,6 +5,7 @@ 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 org.apache.ibatis.annotations.Update;
 
 import java.util.List;
 
@@ -22,5 +23,14 @@ public interface ChapterMapper extends BaseMapper<Chapter> {
 
     @Select("SELECT * FROM course_chapter WHERE course_id = #{courseId} AND (pid = #{parentId} )")
     List<Chapter> selectSectionsWithChildren(@Param("courseId") String courseId, @Param("parentId") String parentId);
+    @Select("SELECT * FROM chapter WHERE id = #{excelId}")
+    Chapter findByExcelId(Long excelId);
 
+    @Update("UPDATE chapter SET pid = #{newPid} WHERE id = #{id}")
+    void updatePidById(@Param("id") Long id, @Param("newPid") Long newPid);
+
+    @Select("SELECT id, name, course_id FROM chapter WHERE name = #{name} AND course_id = #{courseId}")
+    Chapter selectByNameAndCourseId(@Param("name") String name, @Param("courseId") String courseId);
+@Select("select pid ,course_id,total_class_hours from chapter where pid = #{chapterId} and course_id = #{courseId} ")
+    List<Chapter> selectByIdAndPid(@Param("chapterId") Long chapterId, @Param("courseId")String courseId);
 }

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

@@ -0,0 +1,28 @@
+package com.teaching.backend.mapper.chapter;
+
+
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.teaching.backend.model.entity.chapter.Chapter;
+import com.teaching.backend.model.entity.chapter.TemporaryChapter;
+import io.lettuce.core.dynamic.annotation.Param;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
+
+/**
+ * <p>
+ *  Mapper 接口
+ * </p>
+ *
+ * @author author
+ * @since 2024-05-31
+ */
+public interface TemporaryChapterMapper extends BaseMapper<TemporaryChapter> {
+
+    TemporaryChapter selectOneByPidAndOrderNumDesc(long l);
+
+    List<TemporaryChapter> selectAll();
+
+    void deleteAll();
+}

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

@@ -1,5 +1,7 @@
 package com.teaching.backend.model.dto.chapter;
 
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.fasterxml.jackson.annotation.JsonFormat;
 import io.swagger.annotations.ApiModelProperty;
 import lombok.AllArgsConstructor;
 import lombok.Data;
@@ -28,12 +30,14 @@ public class ChapterDTO implements Serializable {
 
 
     @ApiModelProperty(value = "创建日期")
+    @JsonFormat(pattern = "yyyy/M/d HH:mm:ss")
     private LocalDateTime createTime;
 
     @ApiModelProperty(value = "更新人")
     private String updateBy;
 
     @ApiModelProperty(value = "更新日期")
+    @JsonFormat(pattern = "yyyy/M/d HH-mm-ss")
     private LocalDateTime updateTime;
 
     @ApiModelProperty(value = "所属部门")
@@ -74,7 +78,12 @@ public class ChapterDTO implements Serializable {
     @ApiModelProperty(value = "内部序号显示")
     private String numshow;
 
+    @ApiModelProperty(value = "excel上级序号")
+    @TableField(exist = false)
+    private Long ParentExcelId;
 
-
+    @ApiModelProperty(value = "excel序号")
+    @TableField(exist = false)
+    private Long ExcelId;
 
 }

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

@@ -0,0 +1,95 @@
+package com.teaching.backend.model.entity.chapter;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import com.teaching.backend.model.entity.Knowtemp.Knowtemp;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.experimental.Accessors;
+
+import java.io.Serializable;
+import java.time.LocalDateTime;
+import java.util.List;
+
+/**
+ * <p>
+ *
+ * </p>
+ *
+ * @author author
+ * @since 2024-05-31
+ */
+@Data
+@EqualsAndHashCode(callSuper = false)
+@Accessors(chain = true)
+@TableName("temporary_chapter")
+public class TemporaryChapter implements Serializable {
+
+
+
+    @ApiModelProperty(value = "主键")
+    @TableId(value = "id", type = IdType.AUTO)
+    private Long id;
+
+    @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 Double orderNum;
+
+    @ApiModelProperty(value = "名称")
+    private String name;
+
+    @ApiModelProperty(value = "简介")
+    private String content;
+
+    @ApiModelProperty(value = "父级节点")
+    private Long pid;
+
+    @ApiModelProperty(value = "课程")
+
+    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 = "内部序号显示")
+    private String numshow;
+
+    @ApiModelProperty(value = "子章节")
+    @TableField(exist = false)
+    private List<TemporaryChapter> children; // 用于存储子章节
+
+    @ApiModelProperty(value = "知识点")
+    @TableField(exist = false)
+    private List<Knowtemp> knowledgePoints; // 用于存储章节下的知识点
+
+
+}

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

@@ -1,11 +1,15 @@
 package com.teaching.backend.service.chapter;
 
 
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 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;
 
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -32,6 +36,9 @@ public interface IChapterService extends IService<Chapter> {
     void saveChapter(ChapterDTO chapterDTO);
 
 
+
+    Long saveExcelChapter2(ChapterDTO chapterDTO, boolean b);
+
     void insertChapter(Long chapterId1, Long chapterId2, ChapterDTO newChapterDTO);
 
     void deleteChapter(Long id);
@@ -41,4 +48,17 @@ public interface IChapterService extends IService<Chapter> {
     void downChapter(Long chapterId);
 
 
+    void downLoadXlsx(HttpServletResponse response, String courseId) throws IOException;
+
+
+
+    void moveDataFromTemporaryToFinal();
+
+    Long saveToTemporaryTable(ChapterDTO chapterDTO);
+
+    void downExcel(HttpServletResponse response) throws IOException;
+
+    Page getAllChapters(int page, int pageSize);
+
+    Chapter selectChapter(Long chapterId);
 }

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

@@ -0,0 +1,36 @@
+package com.teaching.backend.service.impl.chapter;
+
+import com.teaching.backend.utils.Chapter.ExcelParser;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * ClassName: ChapterExcelServiceImpl
+ * Package: com.teaching.backend.service.impl.chapter
+ * Description:
+ *
+ * @Author 姜钧瀚
+ * @Create 2024/8/4 10:50
+ * @Version 1.0
+ */
+@Service
+public class ChapterExcelServiceImpl {
+
+    @Autowired
+    ExcelParser excelParser;
+
+    public List<String> uploadExcel(MultipartFile file, String courseId) {
+        List<String> validationErrors = new ArrayList<>();
+        try (InputStream inputStream = file.getInputStream()) {
+            validationErrors = excelParser.parse(inputStream, courseId);
+        } catch (Exception e) {
+            validationErrors.add("系统错误: " + e.getMessage());
+        }
+        return validationErrors;
+    }
+}

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

@@ -4,21 +4,29 @@ package com.teaching.backend.service.impl.chapter;
 import cn.hutool.core.bean.BeanUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 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.Knowtemp.KnowtempMapper;
 import com.teaching.backend.mapper.chapter.ChapterMapper;
+import com.teaching.backend.mapper.chapter.TemporaryChapterMapper;
 import com.teaching.backend.model.dto.chapter.ChapterDTO;
 import com.teaching.backend.model.entity.Knowtemp.Knowtemp;
 import com.teaching.backend.model.entity.chapter.Chapter;
+import com.teaching.backend.model.entity.chapter.TemporaryChapter;
 import com.teaching.backend.model.vo.chapter.ChapterVo;
 import com.teaching.backend.service.KnowGraph.KnowService;
 import com.teaching.backend.service.chapter.IChapterService;
+import com.teaching.backend.utils.Chapter.ExcelUtils;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.math.BigDecimal;
 import java.time.LocalDateTime;
 import java.util.*;
 import java.util.stream.Collectors;
@@ -30,9 +38,12 @@ import java.util.stream.Collectors;
  */
 @Service
 public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> implements IChapterService {
+
     @Autowired
     private ChapterMapper chapterMapper;
 
+    @Autowired
+    private TemporaryChapterMapper temporaryChapterMapper;
     @Autowired
      private KnowtempMapper knowtempMapper;
 //    private int count=0;
@@ -217,7 +228,7 @@ public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> impl
     }
     @Override
     public void saveChapter(ChapterDTO chapterDTO) {
-
+        System.out.println("我导入Excel成功进入到了这一步");
         Chapter chapter = new Chapter();
         try {
             BeanUtils.copyProperties(chapterDTO, chapter);
@@ -266,6 +277,59 @@ public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> impl
             }
         }
     }
+    @Override
+    public Long saveExcelChapter2(ChapterDTO chapterDTO, boolean isParent) {
+        Chapter chapter = new Chapter();
+        try {
+            BeanUtils.copyProperties(chapterDTO, chapter);
+        } catch (Exception e) {
+            throw new RuntimeException("复制数据出错", e); // 使用自定义异常
+        }
+
+        LocalDateTime now = LocalDateTime.now();
+        chapter.setCreateTime(now);
+        chapter.setUpdateTime(now);
+
+        Long pid = chapter.getPid();
+        if (isParent) {
+            if (pid == null || pid == 0) {
+                chapter.setPid(0L);
+
+                LambdaQueryWrapper<Chapter> maxSortWrapper = new LambdaQueryWrapper<>();
+                maxSortWrapper.eq(Chapter::getPid, 0).orderByDesc(Chapter::getOrderNum).last("limit 1");
+
+                Chapter maxSortChapter = this.getOne(maxSortWrapper);
+                double newSort = (maxSortChapter != null) ? maxSortChapter.getOrderNum() + 1 : 1;
+
+                chapter.setOrderNum(newSort);
+                this.save(chapter);
+
+                return chapter.getId();
+            }
+        }else {
+                Chapter parentChapter = this.getById(pid);
+                if (parentChapter != null) {
+                    LambdaQueryWrapper<Chapter> maxSortWrapper = new LambdaQueryWrapper<>();
+                    maxSortWrapper.eq(Chapter::getPid, pid).orderByDesc(Chapter::getOrderNum).last("limit 1");
+
+                    Chapter maxSortChapter = this.getOne(maxSortWrapper);
+                    double newSort = (maxSortChapter != null) ? maxSortChapter.getOrderNum() + 1 : 1;
+
+                    chapter.setOrderNum(newSort);
+
+                    parentChapter.setUpdateTime(now);
+                    this.updateById(parentChapter);
+
+                    this.save(chapter);
+
+                    return chapter.getId();
+                } else {
+                    throw new BusinessException(ErrorCode.PARAMS_ERROR, "未找到父章节，ID 为: " + pid);
+                }
+            } return null;
+        }
+
+
 
     @Override
     public void insertChapter(Long chapterId1, Long chapterId2, ChapterDTO newChapterDTO) {
@@ -346,6 +410,146 @@ public class ChapterServiceImpl extends ServiceImpl<ChapterMapper, Chapter> impl
         moveChapter(chapterId, false);
     }
 
+    @Override
+    public void downExcel(HttpServletResponse response) throws IOException {
+            ExcelUtils.createTemplateExcel(response);
+        }
+
+    @Override
+    public Page<Chapter>getAllChapters(int page, int pageSize) {
+
+        Page<Chapter> pageInfo=new Page<>(page,pageSize);
+        LambdaQueryWrapper<Chapter> queryWrapper=new LambdaQueryWrapper<>();
+        this.page(pageInfo,queryWrapper);
+
+        return pageInfo;
+    }
+
+    @Override
+    public Chapter selectChapter(Long chapterId) {
+        LambdaQueryWrapper<Chapter> lambdaQueryWrapper = new LambdaQueryWrapper<>();
+        lambdaQueryWrapper.eq(Chapter::getId, chapterId);
+
+        Chapter chapter = this.getOne(lambdaQueryWrapper);
+        if (chapter == null) {
+            throw new BusinessException(ErrorCode.NOT_FOUND_ERROR, "请求数据不存在");
+        }
+
+        if (chapter.getPid() == 0) {
+            String courseId = chapter.getCourseId();
+            List<Chapter> subChapters = chapterMapper.selectByIdAndPid(chapterId,courseId);
+
+
+            BigDecimal totalClassHours = BigDecimal.ZERO;
+            for (Chapter subChapter : subChapters) {
+                try {
+                    BigDecimal classHours = new BigDecimal(subChapter.getTotalClassHours());
+                    totalClassHours = totalClassHours.add(classHours);
+                } catch (NumberFormatException e) {
+                    throw new BusinessException(ErrorCode.OPERATION_ERROR, "无效的总学时数据");
+                }
+            }
+
+            chapter.setTotalClassHours(String.valueOf(totalClassHours));
+        }else {
+            chapter.setTotalClassHours(chapter.getTotalClassHours());
+        }
+
+
+        return chapter;
+    }
+
+    @Override
+    public void downLoadXlsx(HttpServletResponse response, String courseId) throws IOException {
+        LambdaQueryWrapper<Chapter> lambdaQueryWrapper = new LambdaQueryWrapper<>();
+        lambdaQueryWrapper.eq(Chapter::getCourseId, courseId);
+
+        List<Chapter> chapterList = this.list(lambdaQueryWrapper);
+        ExcelUtils.createDataExcel(response, chapterList);
+    }
+
+
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public void moveDataFromTemporaryToFinal() {
+        List<TemporaryChapter> temporaryChapters = temporaryChapterMapper.selectAll();
+        Map<Long, Long> tempIdToFinalIdMap = new HashMap<>();
+
+        for (TemporaryChapter tempChapter : temporaryChapters) {
+
+            Chapter existingChapter = chapterMapper.selectByNameAndCourseId(tempChapter.getName(), tempChapter.getCourseId());
+            if (existingChapter != null) {
+                tempIdToFinalIdMap.put(tempChapter.getId(), existingChapter.getId());
+                continue;
+            }
+
+
+
+            Chapter finalChapter = new Chapter();
+            try {
+                BeanUtils.copyProperties(tempChapter, finalChapter);
+            } catch (Exception e) {
+                throw new RuntimeException("复制数据出错", e);
+            }
+              finalChapter.setId(null);
+            this.save(finalChapter);
+            tempIdToFinalIdMap.put(tempChapter.getId(), finalChapter.getId());
+        }
+
+        for (TemporaryChapter tempChapter : temporaryChapters) {
+            if (tempChapter.getPid() != 0) {
+                Long newPid = tempIdToFinalIdMap.get(tempChapter.getPid());
+                if (newPid != null) {
+                    chapterMapper.updatePidById(tempIdToFinalIdMap.get(tempChapter.getId()), newPid);
+                } else {
+                    throw new BusinessException(ErrorCode.PARAMS_ERROR, "未找到父章节，临时表 ID 为: " + tempChapter.getPid());
+                }
+            }
+        }
+
+        temporaryChapterMapper.deleteAll();
+    }
+
+    @Transactional(rollbackFor = Exception.class)
+
+    @Override
+    public Long saveToTemporaryTable(ChapterDTO chapterDTO) {
+        TemporaryChapter temporaryChapter = new TemporaryChapter();
+        try {
+            BeanUtils.copyProperties(chapterDTO, temporaryChapter);
+        } catch (Exception e) {
+            throw new RuntimeException("复制数据出错", e);
+        }
+
+        Long pid = temporaryChapter.getPid();
+        if (pid == null || pid == 0) {
+            temporaryChapter.setPid(0L);
+            setChapterOrder(temporaryChapter, 0L);
+        } else {
+            TemporaryChapter parentChapter = temporaryChapterMapper.selectById(pid);
+            if (parentChapter != null) {
+                temporaryChapter.setPid(parentChapter.getId());
+                setChapterOrder(temporaryChapter, pid);
+            } else {
+                throw new BusinessException(ErrorCode.PARAMS_ERROR, "未找到父章节，ID 为: " + pid);
+            }
+        }
+
+        temporaryChapterMapper.insert(temporaryChapter);
+        return temporaryChapter.getId();
+
+    }
+
+
+    private void setChapterOrder(TemporaryChapter chapter, Long pid) {
+        TemporaryChapter maxSortChapter = temporaryChapterMapper.selectOneByPidAndOrderNumDesc(pid);
+        double newSort = (maxSortChapter != null) ? maxSortChapter.getOrderNum() + 1 : 1;
+        chapter.setOrderNum(newSort);
+        chapter.setCreateTime(LocalDateTime.now());
+        chapter.setUpdateTime(LocalDateTime.now());
+    }
+
+
 
 
     public void moveChapter(Long chapterId, boolean moveUp) {

src/main/java/com/teaching/backend/utils/Chapter/ExcelParser.java

@@ -0,0 +1,75 @@
+package com.teaching.backend.utils.Chapter;
+
+/**
+ * ClassName: ExcelParser
+ * Package: com.teaching
+ * Description:
+ *
+ * @Author 姜钧瀚
+ * @Create 2024/8/3 14:58
+ * @Version 1.0
+ */
+
+import com.teaching.backend.service.chapter.IChapterService;
+import org.apache.poi.openxml4j.opc.OPCPackage;
+import org.apache.poi.xssf.eventusermodel.XSSFReader;
+import org.apache.poi.xssf.eventusermodel.XSSFSheetXMLHandler;
+import org.apache.poi.xssf.model.SharedStringsTable;
+import org.apache.poi.xssf.model.StylesTable;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+import org.xml.sax.InputSource;
+import org.xml.sax.XMLReader;
+import org.xml.sax.helpers.XMLReaderFactory;
+
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 自定义Excel解析器
+ */
+@Component
+public class ExcelParser {
+
+    @Autowired
+    IChapterService chapterService;
+
+    public List<String> parse(InputStream inputStream, String courseId) throws Exception {
+        OPCPackage pkg = OPCPackage.open(inputStream);
+        List<String> validationErrors = new ArrayList<>();
+        try {
+            XSSFReader reader = new XSSFReader(pkg);
+            SharedStringsTable sst = reader.getSharedStringsTable();
+            StylesTable styles = reader.getStylesTable();
+            XMLReader parser = XMLReaderFactory.createXMLReader();
+
+            SheetHandler sheetHandler = new SheetHandler(chapterService, courseId);
+            parser.setContentHandler(new XSSFSheetXMLHandler(styles, sst, sheetHandler, false));
+
+            XSSFReader.SheetIterator sheets = (XSSFReader.SheetIterator) reader.getSheetsData();
+            while (sheets.hasNext()) {
+                InputStream sheetstream = sheets.next();
+                InputSource sheetSource = new InputSource(sheetstream);
+                try {
+                    parser.parse(sheetSource);
+                } finally {
+                    sheetstream.close();
+                }
+            }
+
+            validationErrors = sheetHandler.finalizeProcess();
+            if (!validationErrors.isEmpty()) {
+                for (String error : validationErrors) {
+                    System.out.println("导入错误: " + error);
+                }
+            } else {
+                System.out.println("数据导入成功！");
+            }
+
+        } finally {
+            pkg.close();
+        }
+        return validationErrors;
+    }
+}

src/main/java/com/teaching/backend/utils/Chapter/ExcelUtils.java

@@ -0,0 +1,113 @@
+package com.teaching.backend.utils.Chapter;
+
+import com.teaching.backend.common.ErrorCode;
+import com.teaching.backend.exception.BusinessException;
+import com.teaching.backend.model.entity.chapter.Chapter;
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * ClassName: ExcelUtils
+ * Package: com.teaching.backend.utils.Chapter
+ * Description:
+ *
+ * @Author 姜钧瀚
+ * @Create 2024/8/7 18:57
+ * @Version 1.0
+ */
+public class ExcelUtils {
+
+    public static void createTemplateExcel(HttpServletResponse response) throws IOException {
+        String[] titles = new String[]{"编号", "章节", "上级编号"};
+        Sheet sheet = createWorkbookAndSheet("模版", titles);
+
+        // 添加模板数据
+        Row templateRow = sheet.createRow(1);
+        templateRow.createCell(0).setCellValue(1);
+        templateRow.createCell(1).setCellValue("示例父章节名");
+        templateRow.createCell(2).setCellValue(0);
+
+        Row templateRow2 = sheet.createRow(2);
+        templateRow2.createCell(0).setCellValue(2);
+        templateRow2.createCell(1).setCellValue("示例子章节名");
+        templateRow2.createCell(2).setCellValue(1);
+
+        writeWorkbookToResponse(sheet.getWorkbook(), response, "章节模版.xlsx");
+    }
+
+    public static void createDataExcel(HttpServletResponse response, List<Chapter> chapterList) throws IOException {
+        String[] titles = new String[]{"编号", "章节", "上级编号"};
+        Sheet sheet = createWorkbookAndSheet("用户数据", titles);
+
+        Map<Long, Integer> idMapping = createIdMapping(chapterList);
+
+        int rowIndex = 1;
+        for (Chapter chapter : chapterList) {
+            Row row = sheet.createRow(rowIndex);
+            Integer excelId = idMapping.get(chapter.getId());
+
+            if (excelId == null) {
+                throw new BusinessException(ErrorCode.OPERATION_ERROR);
+            }
+            row.createCell(0).setCellValue(excelId);
+            row.createCell(1).setCellValue(chapter.getName());
+            long parentId = chapter.getPid() != 0 ? idMapping.get(chapter.getPid()) : 0;
+            row.createCell(2).setCellValue(parentId != 0 ? parentId : 0);
+            rowIndex++;
+        }
+
+        writeWorkbookToResponse(sheet.getWorkbook(), response, "章节数据.xlsx");
+    }
+
+    private static Map<Long, Integer> createIdMapping(List<Chapter> chapterList) {
+        Map<Long, Integer> idMapping = new HashMap<>();
+        int newId = 1;
+        for (Chapter chapter : chapterList) {
+            idMapping.put(chapter.getId(), newId);
+            newId++;
+        }
+        return idMapping;
+    }
+
+    private static Sheet createWorkbookAndSheet(String sheetName, String[] titles) throws IOException {
+        Workbook workbook = new XSSFWorkbook();
+        Sheet sheet = workbook.createSheet(sheetName);
+
+        // 设置列宽
+        sheet.setColumnWidth(0, 30 * 256);
+        sheet.setColumnWidth(1, 60 * 256);
+        sheet.setColumnWidth(2, 30 * 256);
+
+        // 创建标题行
+        Row titleRow = sheet.createRow(0);
+        for (int i = 0; i < titles.length; i++) {
+            Cell cell = titleRow.createCell(i);
+            cell.setCellValue(titles[i]);
+        }
+
+        return sheet;
+    }
+
+    private static void writeWorkbookToResponse(Workbook workbook, HttpServletResponse response, String filename) throws IOException {
+        response.setHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes(), "ISO8859-1"));
+        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
+        response.setCharacterEncoding("UTF-8");
+
+        try (ServletOutputStream outputStream = response.getOutputStream()) {
+            workbook.write(outputStream);
+            outputStream.flush();
+        } finally {
+            workbook.close();
+        }
+    }
+}

src/main/java/com/teaching/backend/utils/Chapter/SheetHandler.java

@@ -0,0 +1,134 @@
+package com.teaching.backend.utils.Chapter;
+
+import com.teaching.backend.common.ErrorCode;
+import com.teaching.backend.common.ResultUtils;
+import com.teaching.backend.exception.BusinessException;
+import com.teaching.backend.model.dto.chapter.ChapterDTO;
+import com.teaching.backend.service.chapter.IChapterService;
+import org.apache.poi.xssf.eventusermodel.XSSFSheetXMLHandler;
+import org.apache.poi.xssf.usermodel.XSSFComment;
+
+import java.util.*;
+
+/**
+ * ClassName: SheetHandler
+ * Package: com.teaching.backend.utils
+ * Description:
+ *
+ * @Author 姜钧瀚
+ * @Create 2024/8/3 14:13
+ * @Version 1.0
+ */
+
+public class SheetHandler implements XSSFSheetXMLHandler.SheetContentsHandler {
+
+    private final IChapterService chapterService;
+    private final String courseId;
+    private ChapterDTO chapterDTO;
+    private Map<Long, Long> excelIdToDatabaseIdMap = new HashMap<>();
+    private List<String> validationErrors = new ArrayList<>();
+    private boolean hasErrors = false;
+    private List<ChapterDTO> collectedChapters = new ArrayList<>();
+
+    public SheetHandler(IChapterService chapterService, String courseId) {
+        this.chapterService = chapterService;
+        this.courseId = courseId;
+    }
+
+    @Override
+    public void startRow(int rowIndex) {
+        if (rowIndex == 0) {
+            chapterDTO = null;
+        } else {
+            chapterDTO = new ChapterDTO();
+            chapterDTO.setCourseId(courseId);
+        }
+    }
+
+    @Override
+    public void endRow(int rowIndex) {
+        if (rowIndex != 0 && chapterDTO != null) {
+            List<String> errors = validateChapter(chapterDTO);
+            if (!errors.isEmpty()) {
+                validationErrors.addAll(errors);
+                hasErrors = true;
+                return;
+            }
+
+            collectedChapters.add(chapterDTO);
+        }
+    }
+
+    public List<String> finalizeProcess() {
+        if (hasErrors) {
+            return validationErrors;
+        }
+
+        for (ChapterDTO chapter : collectedChapters) {
+            if (chapter.getParentExcelId() == null || chapter.getParentExcelId() == 0) {
+                saveToTemporaryTable(chapter);
+            }
+        }
+
+        for (ChapterDTO chapter : collectedChapters) {
+            if (chapter.getParentExcelId() != null && chapter.getParentExcelId() != 0) {
+                saveToTemporaryTable(chapter);
+            }
+        }
+
+
+        chapterService.moveDataFromTemporaryToFinal();
+        return Collections.emptyList();
+    }
+
+    private void saveToTemporaryTable(ChapterDTO chapterDTO) {
+        Long pid = chapterDTO.getParentExcelId();
+        if (pid != null && pid != 0) {
+            Long parentId = excelIdToDatabaseIdMap.get(pid);
+            if (parentId != null) {
+                chapterDTO.setPid(parentId);
+            } else {
+                throw new BusinessException(ErrorCode.PARAMS_ERROR, "未找到父章节，Excel ID 为: " + pid);
+            }
+        }
+
+
+        Long savedChapterId = chapterService.saveToTemporaryTable(chapterDTO);
+        excelIdToDatabaseIdMap.put(chapterDTO.getExcelId(), savedChapterId);
+    }
+
+
+
+
+    private List<String> validateChapter(ChapterDTO chapterDTO) {
+        List<String> errors = new ArrayList<>();
+        if (chapterDTO.getName() == null || chapterDTO.getName().isEmpty()) {
+            errors.add("编号："+chapterDTO.getExcelId()+"的章节名字不能为空");
+        }
+        if (chapterDTO.getExcelId() == null || chapterDTO.getExcelId() <= 0) {
+            errors.add("编号不能小于0");
+        }
+        if (chapterDTO.getParentExcelId() == null || chapterDTO.getParentExcelId() < 0) {
+            errors.add("编号："+chapterDTO.getExcelId()+"的上级编号不能小于0");
+        }
+        return errors;
+    }
+
+    @Override
+    public void cell(String cellReference, String formattedValue, XSSFComment comment) {
+        if (chapterDTO != null && formattedValue != null) {
+            String letter = cellReference.substring(0, 1);
+            switch (letter) {
+                case "A":
+                    chapterDTO.setExcelId(Long.valueOf(formattedValue));
+                    break;
+                case "B":
+                    chapterDTO.setName(formattedValue);
+                    break;
+                case "C":
+                    chapterDTO.setParentExcelId(Long.valueOf(formattedValue));
+                    break;
+            }
+        }
+    }
+}

src/main/resources/mapper/TemporaryChapterMapper.xml

@@ -0,0 +1,21 @@
+<?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.teaching.backend.mapper.chapter.TemporaryChapterMapper">
+    <delete id="deleteAll">
+        DELETE FROM temporary_chapter
+
+    </delete>
+
+    <select id="selectOneByPidAndOrderNumDesc" resultType="com.teaching.backend.model.entity.chapter.TemporaryChapter">
+        SELECT * FROM temporary_chapter
+        WHERE pid = #{pid}
+        ORDER BY order_num DESC
+            LIMIT 1
+    </select>
+    <select id="selectAll" resultType="com.teaching.backend.model.entity.chapter.TemporaryChapter">
+
+        SELECT * FROM temporary_chapter
+
+
+    </select>
+</mapper>