diff --git a/pom.xml b/pom.xml index 803f420..6e12190 100644 --- a/pom.xml +++ b/pom.xml @@ -97,6 +97,14 @@ hutool-all 5.8.11 + + + + com.github.pagehelper + pagehelper + 4.1.6 + + diff --git a/src/main/java/com/teaching/backend/controller/ChapterController.java b/src/main/java/com/teaching/backend/controller/ChapterController.java deleted file mode 100644 index f10ad15..0000000 --- a/src/main/java/com/teaching/backend/controller/ChapterController.java +++ /dev/null @@ -1,20 +0,0 @@ -package com.teaching.backend.controller; - - -import org.springframework.web.bind.annotation.RequestMapping; - -import org.springframework.web.bind.annotation.RestController; - -/** - *

- * 前端控制器 - *

- * - * @author author - * @since 2024-06-07 - */ -@RestController -@RequestMapping("/chapter") -public class ChapterController { - -} diff --git a/src/main/java/com/teaching/backend/controller/chapter/ChapterController.java b/src/main/java/com/teaching/backend/controller/chapter/ChapterController.java deleted file mode 100644 index 7fc04f0..0000000 --- a/src/main/java/com/teaching/backend/controller/chapter/ChapterController.java +++ /dev/null @@ -1,28 +0,0 @@ -package com.teaching.backend.controller.chapter; - - - -import com.teaching.backend.service.chapter.IChapterService; -import io.swagger.annotations.Api; -import lombok.extern.slf4j.Slf4j; -import org.springframework.beans.factory.annotation.Autowired; -import org.springframework.web.bind.annotation.GetMapping; -import org.springframework.web.bind.annotation.RequestMapping; -import org.springframework.web.bind.annotation.RestController; - -import java.util.List; - -/** - * - * @author author - * @since 2024-05-31 - */ -@Slf4j -@Api(tags = "章节管理") -@RestController -@RequestMapping("/chapter") -public class ChapterController { - @Autowired - private IChapterService chapterService; - -} diff --git a/src/main/java/com/teaching/backend/controller/records/LearningRecordsController.java b/src/main/java/com/teaching/backend/controller/records/LearningRecordsController.java new file mode 100644 index 0000000..a007aaa --- /dev/null +++ b/src/main/java/com/teaching/backend/controller/records/LearningRecordsController.java @@ -0,0 +1,89 @@ +package com.teaching.backend.controller.records; + + +import com.github.pagehelper.PageHelper; +import com.github.pagehelper.PageInfo; +import com.teaching.backend.common.BaseResponse; +import com.teaching.backend.common.ResultUtils; + +import com.teaching.backend.model.entity.records.LearningRecords; +import com.teaching.backend.model.vo.records.LearningRecordsVo; +import com.teaching.backend.service.impl.records.LearningRecordsServiceImpl; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.ui.Model; +import org.springframework.web.bind.annotation.*; + +import java.util.ArrayList; +import java.util.List; + +@RestController +@RequestMapping("/learningrecords") +public class LearningRecordsController { + + @Autowired + private LearningRecordsServiceImpl learningRecordsService; + + + /** + * 获取当前登录用户的学习记录 + * @param m + * @param pagenum + * @param pagesize + * @return + */ + @GetMapping("/getall") + public BaseResponse getAll(Model m, + @RequestParam(value = "pagenum", defaultValue = "1") int pagenum, + @RequestParam(value = "pagesize", defaultValue = "15") int pagesize, + @RequestParam String userId){ + PageHelper.startPage(pagenum,pagesize,"id desc"); + List cs= learningRecordsService.getAll(userId); + List pageCs = new ArrayList<>(); + //当前页面 + for(int i = (pagenum - 1) * pagesize; i < cs.size() && i < (pagenum) * pagesize; i++){ + pageCs.add(cs.get(i)); + } + PageInfo pageInfo = new PageInfo<>(pageCs); + System.out.println("当前页面:"+pagenum); + System.out.println("当前页面大小:"+pagesize); + System.out.println("当前页面内容:"+pageCs); +// PageInfo pageInfo = new PageInfo<>(cs); + pageInfo.setPageSize(pagesize);//设置当前页面大小 + pageInfo.setPageNum(pagenum);//设置当前页码 + pageInfo.setSize(pagesize);//不知道是啥，--------- + pageInfo.setTotal(cs.size());//设置总条数 + long total = pageInfo.getTotal(); // 总记录数 + pageInfo.setPages((int)(Math.ceil((double) total / pagesize)));//设置总页数 + return ResultUtils.success(pageInfo); + } + + @GetMapping("/all") + public BaseResponse> All(){ + System.out.println("学习记录:"+learningRecordsService.list()); + return ResultUtils.success(learningRecordsService.list()); + } + + //资源类型: 1,课程学习记录,2,知识点学习记录,3课程资源学习记录 + /** + * 添加课程记录 + * @param learningRecords + * @return + */ + @PostMapping("/saverecords") + public BaseResponse saveRecords(@RequestBody LearningRecords learningRecords){ + System.out.println(learningRecords); + return ResultUtils.success(learningRecordsService.saveRecords(learningRecords)); + } + + /** + * 根据id删除 + * @param ids + * @return + */ + @DeleteMapping("/delete") + public BaseResponse deleteRecords(@RequestParam List ids){ + + return ResultUtils.success(learningRecordsService.delete(ids)); + } + +} diff --git a/src/main/java/com/teaching/backend/mapper/ChapterMapper.java b/src/main/java/com/teaching/backend/mapper/ChapterMapper.java deleted file mode 100644 index 375a19c..0000000 --- a/src/main/java/com/teaching/backend/mapper/ChapterMapper.java +++ /dev/null @@ -1,16 +0,0 @@ -package com.teaching.backend.mapper; - -import com.teaching.backend.entity.Chapter; -import com.baomidou.mybatisplus.core.mapper.BaseMapper; - -/** - *

- * Mapper 接口 - *

- * - * @author author - * @since 2024-06-07 - */ -public interface ChapterMapper extends BaseMapper { - -} diff --git a/src/main/java/com/teaching/mapper/KnowMapper.java b/src/main/java/com/teaching/backend/mapper/know/KnowMapper.java similarity index 64% rename from src/main/java/com/teaching/mapper/KnowMapper.java rename to src/main/java/com/teaching/backend/mapper/know/KnowMapper.java index 00e6cf3..d6c2237 100644 --- a/src/main/java/com/teaching/mapper/KnowMapper.java +++ b/src/main/java/com/teaching/backend/mapper/know/KnowMapper.java @@ -1,7 +1,7 @@ -package com.teaching.mapper; +package com.teaching.backend.mapper.know; import com.baomidou.mybatisplus.core.mapper.BaseMapper; -import com.teaching.model.entity.Know; +import com.teaching.backend.model.entity.know.Know; import org.apache.ibatis.annotations.Mapper; @Mapper diff --git a/src/main/java/com/teaching/backend/mapper/records/LearningRecordsMapper.java b/src/main/java/com/teaching/backend/mapper/records/LearningRecordsMapper.java new file mode 100644 index 0000000..55d587d --- /dev/null +++ b/src/main/java/com/teaching/backend/mapper/records/LearningRecordsMapper.java @@ -0,0 +1,15 @@ +package com.teaching.backend.mapper.records; + +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.records.LearningRecords; +import org.apache.ibatis.annotations.Mapper; +import org.apache.ibatis.annotations.Param; + +@Mapper +public interface LearningRecordsMapper extends BaseMapper { + IPage selectPageList(Page page, @Param("model")LearningRecords model); + +} diff --git a/src/main/java/com/teaching/backend/model/entity/chapter/Chapter.java b/src/main/java/com/teaching/backend/model/entity/chapter/Chapter.java index 0a7cafb..8861632 100644 --- a/src/main/java/com/teaching/backend/model/entity/chapter/Chapter.java +++ b/src/main/java/com/teaching/backend/model/entity/chapter/Chapter.java @@ -25,7 +25,6 @@ import java.time.LocalDateTime; @EqualsAndHashCode(callSuper = false) @Accessors(chain = true) @TableName("chapter") -@ApiModel(value="Chapter对象", description="") public class Chapter implements Serializable { private static final long serialVersionUID = 1L; diff --git a/src/main/java/com/teaching/model/entity/Know.java b/src/main/java/com/teaching/backend/model/entity/know/Know.java similarity index 91% rename from src/main/java/com/teaching/model/entity/Know.java rename to src/main/java/com/teaching/backend/model/entity/know/Know.java index 0a8724a..b2e580f 100644 --- a/src/main/java/com/teaching/model/entity/Know.java +++ b/src/main/java/com/teaching/backend/model/entity/know/Know.java @@ -1,4 +1,4 @@ -package com.teaching.model.entity; +package com.teaching.backend.model.entity.know; import io.swagger.annotations.Api; import lombok.AllArgsConstructor; @@ -6,7 +6,6 @@ import lombok.Data; import lombok.NoArgsConstructor; -import javax.persistence.Table; import java.io.Serializable; import java.time.LocalDateTime; diff --git a/src/main/java/com/teaching/backend/model/entity/records/LearningRecords.java b/src/main/java/com/teaching/backend/model/entity/records/LearningRecords.java new file mode 100644 index 0000000..be7d920 --- /dev/null +++ b/src/main/java/com/teaching/backend/model/entity/records/LearningRecords.java @@ -0,0 +1,96 @@ +package com.teaching.backend.model.entity.records; + + +import com.baomidou.mybatisplus.annotation.IdType; +import com.baomidou.mybatisplus.annotation.TableId; +import com.baomidou.mybatisplus.annotation.TableName; +import lombok.Data; +import lombok.EqualsAndHashCode; +import lombok.experimental.Accessors; + +import java.time.LocalDateTime; + + +@Data +@EqualsAndHashCode(callSuper = false) +@Accessors(chain = true) +@TableName("learning_records") +public class LearningRecords { + private static final long serialVersionUID = 1L; + + /** + * 内部编号 + */ + @TableId(value = "id", type = IdType.ASSIGN_ID) + private String id; + + /** + * 用户id + */ + private String userId; + + /** + * 课程id + */ + private String coursesId; + /** + * 章节id + */ + private String chapterId; + /** + * 知识点id + */ + private String knowledgePointId; + /** + * 资源id + */ + private String resourceId; + /** + * 访问时间 + */ + private LocalDateTime accessTime; + + /** + * 学习方式:打开; 1,打开过,2未打开 + */ + private String learningMethod1; + /** + * 学习方式:下载; 1下载过, 2未下载 + */ + private String learningMethod2; + /** + *视频学习时长 + */ + private String videoDuration; + + /** + *是否完成观看：1，已完成，0未完成 + */ + private String isCompleted; + + /** + * 记录封面图片 + */ + private String content; + /** + * 资源地址 + */ + private String address; + + /** + * 是否存在: 1存在;0不存在; + */ + private String status; + /** + * 类型, 如:1,课程; 2,章节; 3,知识点; 4,学习资源 + */ + private String type; + /** + * 父节点 + */ + private String parentNode; + + + + +} diff --git a/src/main/java/com/teaching/backend/model/vo/records/LearningRecordsVo.java b/src/main/java/com/teaching/backend/model/vo/records/LearningRecordsVo.java new file mode 100644 index 0000000..e9b3ab2 --- /dev/null +++ b/src/main/java/com/teaching/backend/model/vo/records/LearningRecordsVo.java @@ -0,0 +1,59 @@ +package com.teaching.backend.model.vo.records; + +import lombok.Data; +import lombok.EqualsAndHashCode; +import lombok.experimental.Accessors; + +@Data +@EqualsAndHashCode(callSuper = false) +@Accessors(chain = true) +public class LearningRecordsVo { +// private static final long serialVersionUID = 1L; + + /** + * 内部编号 + */ + private String id; + + /** + * 课程名称 + */ + private String coursesName; + +// /** +// * 资源类型 +// */ +// private String type; + + /** + * 封面 + */ + private String content; + + /** + * 资源观看人数 + */ + private Long number; + + + /** + * 上次观看时间 + */ + private String time; + /** + * 地址 + */ + private String address; +// /** +// * 创建日期 +// */ +// private LocalDateTime createTime; +// +// /** +// * 更新日期 +// */ +// private LocalDateTime updateTime; + + + +} diff --git a/src/main/java/com/teaching/backend/service/IChapterService.java b/src/main/java/com/teaching/backend/service/IChapterService.java deleted file mode 100644 index 4d3ff34..0000000 --- a/src/main/java/com/teaching/backend/service/IChapterService.java +++ /dev/null @@ -1,16 +0,0 @@ -package com.teaching.backend.service; - -import com.teaching.backend.entity.Chapter; -import com.baomidou.mybatisplus.extension.service.IService; - -/** - *

- * 服务类 - *

- * - * @author author - * @since 2024-06-07 - */ -public interface IChapterService extends IService { - -} diff --git a/src/main/java/com/teaching/backend/service/impl/ChapterServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/ChapterServiceImpl.java deleted file mode 100644 index 7cfafc6..0000000 --- a/src/main/java/com/teaching/backend/service/impl/ChapterServiceImpl.java +++ /dev/null @@ -1,20 +0,0 @@ -package com.teaching.backend.service.impl; - -import com.teaching.backend.entity.Chapter; -import com.teaching.backend.mapper.ChapterMapper; -import com.teaching.backend.service.IChapterService; -import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; -import org.springframework.stereotype.Service; - -/** - *

- * 服务实现类 - *

- * - * @author author - * @since 2024-06-07 - */ -@Service -public class ChapterServiceImpl extends ServiceImpl implements IChapterService { - -} diff --git a/src/main/java/com/teaching/backend/service/impl/know/IknowServiceimpl.java b/src/main/java/com/teaching/backend/service/impl/know/IknowServiceimpl.java new file mode 100644 index 0000000..fb99ff7 --- /dev/null +++ b/src/main/java/com/teaching/backend/service/impl/know/IknowServiceimpl.java @@ -0,0 +1,12 @@ +package com.teaching.backend.service.impl.know; + +import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; +import com.teaching.backend.mapper.know.KnowMapper; +import com.teaching.backend.model.entity.know.Know; +import com.teaching.backend.service.know.IknowService; +import org.springframework.stereotype.Service; + +@Service +public class IknowServiceimpl extends ServiceImpl implements IknowService { + +} diff --git a/src/main/java/com/teaching/backend/service/impl/records/LearningRecordsServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/records/LearningRecordsServiceImpl.java new file mode 100644 index 0000000..9bf49af --- /dev/null +++ b/src/main/java/com/teaching/backend/service/impl/records/LearningRecordsServiceImpl.java @@ -0,0 +1,185 @@ +package com.teaching.backend.service.impl.records; + +import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper; +import com.baomidou.mybatisplus.core.metadata.IPage; +import com.baomidou.mybatisplus.extension.plugins.pagination.Page; +import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; + +import com.teaching.backend.mapper.records.LearningRecordsMapper; + +import com.teaching.backend.model.entity.records.LearningRecords; +import com.teaching.backend.model.vo.records.LearningRecordsVo; +import com.teaching.backend.service.impl.chapter.ChapterServiceImpl; +import com.teaching.backend.service.impl.courses.CoursesServiceImpl; +import com.teaching.backend.service.impl.know.IknowServiceimpl; +import com.teaching.backend.service.records.LearningRecordsService; +import org.springframework.beans.BeanUtils; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Service; + +import java.text.SimpleDateFormat; +import java.time.LocalDateTime; +import java.time.ZoneId; +import java.util.ArrayList; +import java.util.Date; +import java.util.List; + +@Service +public class LearningRecordsServiceImpl extends ServiceImpl implements LearningRecordsService { + + @Autowired + private CoursesServiceImpl coursesService; + @Autowired + private LearningRecordsMapper learningRecordsMapper; +// @Autowired +// private LearningResourceServiceImpl learningResourceService; + @Autowired + private IknowServiceimpl knowledgePointService; + @Autowired + private ChapterServiceImpl chapterService; + + @Override + public IPage selectPageList(Page page, LearningRecords model) { + return learningRecordsMapper.selectPageList(page,model); + } + + @Override + public String delete(List ids) { + LambdaQueryWrapper lambdaQueryWrapper = new LambdaQueryWrapper<>(); + lambdaQueryWrapper.in(LearningRecords::getId, ids); + List list = this.list(lambdaQueryWrapper); + //把即将要删除的记录状态调成0 + for (LearningRecords learningRecords : list) { + learningRecords.setStatus("0"); + } + this.updateBatchById(list); +// System.out.println(this.updateBatchById(list)); +// this.remove(lambdaQueryWrapper); + return "删除成功"; + } + + @Override + public List getAll(String userId){ + //格式化时间 + //格式化时间 + String strDateFormat = "yyyy-MM-dd HH:mm:ss"; + SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat); + + List list = new ArrayList<>(); + //将学习记录实体转成学习记录Vo实体 + LambdaQueryWrapper lambdaQueryWrapper1 = new LambdaQueryWrapper<>(); + lambdaQueryWrapper1 + .orderByDesc(LearningRecords::getAccessTime) + .eq(LearningRecords::getUserId, userId) + .eq(LearningRecords::getStatus, "1"); + System.out.println(this.list(lambdaQueryWrapper1)); + //如果为空-------------------????? + for (LearningRecords learningRecords : this.list(lambdaQueryWrapper1)) { + //查找该用户的学习记录 +// if (learningRecords.getUserId().equals(userId) && learningRecords.getStatus().equals("1")){ + LearningRecordsVo learningRecordsVo = new LearningRecordsVo();//好像可以拿出去-----------?? + BeanUtils.copyProperties(learningRecords,learningRecordsVo);//从多传到少(缺少人数,和资源名称,时间需要转格式) + //添加时间 + //LocalDateTime转Date + Date date = Date.from(learningRecords.getAccessTime().atZone(ZoneId.systemDefault()).toInstant()); + learningRecordsVo.setTime(sdf.format(date)); + LambdaQueryWrapper lambdaQueryWrapper = new LambdaQueryWrapper<>(); + lambdaQueryWrapper.eq(LearningRecords::getCoursesId, learningRecords.getCoursesId()); +// System.out.println(learningRecords.getResourceId()); +// System.out.println("1"); + + //添加课程名称 + switch (learningRecords.getType()) { + case "4": //如果是资源学习 + learningRecordsVo.setCoursesName("学习资源");//设置名称 --------------------------------------------待完善 + + break; + case "3": //如果是知识点学习记录 + learningRecordsVo.setCoursesName(knowledgePointService.getById(learningRecords.getCoursesId()).getName()); + + break; + case "2": //如果是章节学习记录 + learningRecordsVo.setCoursesName(chapterService.getById(learningRecords.getCoursesId()).getName()); + + break; + case "1": //如果是课程学习记录 + learningRecordsVo.setCoursesName(coursesService.getById(learningRecords.getCoursesId()).getName()); + break; + } + //添加观看人数 + //统计记录表里有多少人查看过这门资源 + long count = this.count(lambdaQueryWrapper); + System.out.println(count); + learningRecordsVo.setNumber(count); + //把整合后该用户的学习记录添加到List里 + list.add(learningRecordsVo); +// } + } + System.out.println(list); + return list; + } + + /** + * 根据用户id和学习资源id来判断记录是否存在 + * @param learningRecords + * @return + */ + @Override + public String saveRecords(LearningRecords learningRecords) { + String userId = learningRecords.getUserId(); + String coursesId = learningRecords.getCoursesId(); + System.out.println("学习记录:"+learningRecords); + //查找该用户是否观看过该学习资源 + LambdaQueryWrapper lambdaQueryWrapper = new LambdaQueryWrapper<>(); + lambdaQueryWrapper + .eq(LearningRecords::getUserId, userId) + .eq(LearningRecords::getCoursesId, coursesId) + .eq(LearningRecords::getType, learningRecords.getType()); + long count = this.count(lambdaQueryWrapper); + System.out.println("数据库："+count); + learningRecords.setStatus("1");//将该记录的状态设置为1 + //更新观看时间 + learningRecords.setAccessTime(LocalDateTime.now()); + //设置默认封面 + if (learningRecords.getContent() == null || learningRecords.getContent().equals("")){ + learningRecords.setContent("https://teaching-edu123.oss-cn-beijing.aliyuncs.com/Borovets_ZH-CN5914681811_UHD.jpg"); + } +// //添加记录封面 +// switch (learningRecords.getType()) { +// case "4": //如果是资源学习 +// learningRecords.setContent(learningResourceService.getById(learningRecords.getCoursesId()).getContent());//设置封面 +// break; +// case "3": //如果是知识点学习记录 +// learningRecords.setContent(knowledgePointService.getById(learningRecords.getCoursesId()).getContent());//设置封面 +// +// break; +// case "2": //如果是章节学习记录 +// learningRecords.setContent(chapterService.getById(learningRecords.getCoursesId()).getContent());//设置封面 +// +// break; +// case "1": //如果是课程学习记录 +// learningRecords.setContent(coursesService.getById(learningRecords.getCoursesId()).getImg());//设置封面 +// break; +// } + if (count == 0){//如果没有就新增并记录学习方式是打开还是下载 + //根据传上来的type设置 +// learningRecords.setType(learningRecords.getType()); + this.save(learningRecords); + return "添加成功"; + }else {//有就修改记录,更新学习方式 + LearningRecords one = this.getOne(lambdaQueryWrapper); + System.out.println(one); + learningRecords.setId(one.getId());//找到该条记录的id并赋值给本次观看记录 + if ( one.getLearningMethod1() != null && one.getLearningMethod1().equals("1")){ + learningRecords.setLearningMethod1(one.getLearningMethod1()); + } + if (one.getLearningMethod2() != null && one.getLearningMethod2().equals("1")){ + learningRecords.setLearningMethod2(one.getLearningMethod2()); + } + this.updateById(learningRecords); + return "修改成功"; + } + } + + +} diff --git a/src/main/java/com/teaching/service/IknowService.java b/src/main/java/com/teaching/backend/service/know/IknowService.java similarity index 51% rename from src/main/java/com/teaching/service/IknowService.java rename to src/main/java/com/teaching/backend/service/know/IknowService.java index 29a4f1b..d49fed1 100644 --- a/src/main/java/com/teaching/service/IknowService.java +++ b/src/main/java/com/teaching/backend/service/know/IknowService.java @@ -1,8 +1,7 @@ -package com.teaching.service; +package com.teaching.backend.service.know; import com.baomidou.mybatisplus.extension.service.IService; -import com.teaching.model.entity.Know; -import org.springframework.stereotype.Service; +import com.teaching.backend.model.entity.know.Know; public interface IknowService extends IService { diff --git a/src/main/java/com/teaching/backend/service/records/LearningRecordsService.java b/src/main/java/com/teaching/backend/service/records/LearningRecordsService.java new file mode 100644 index 0000000..d2acb1b --- /dev/null +++ b/src/main/java/com/teaching/backend/service/records/LearningRecordsService.java @@ -0,0 +1,19 @@ +package com.teaching.backend.service.records; + +import com.baomidou.mybatisplus.core.metadata.IPage; +import com.baomidou.mybatisplus.extension.plugins.pagination.Page; +import com.baomidou.mybatisplus.extension.service.IService; +import com.teaching.backend.model.entity.records.LearningRecords; +import com.teaching.backend.model.vo.records.LearningRecordsVo; + + +import java.util.List; + +public interface LearningRecordsService extends IService { + public List getAll(String username); + public String saveRecords(LearningRecords learningRecords); + IPage selectPageList(Page page, LearningRecords model); + + public String delete(List ids); + +} diff --git a/src/main/java/com/teaching/service/impl/IknowServiceimpl.java b/src/main/java/com/teaching/service/impl/IknowServiceimpl.java deleted file mode 100644 index 556471e..0000000 --- a/src/main/java/com/teaching/service/impl/IknowServiceimpl.java +++ /dev/null @@ -1,13 +0,0 @@ -package com.teaching.service.impl; - -import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; -import com.teaching.mapper.KnowMapper; -import com.teaching.model.entity.Know; -import com.teaching.service.IknowService; -import org.springframework.stereotype.Service; - -@Service -public class IknowServiceimpl extends ServiceImpl implements IknowServic - e { - -}