学习记录优化查询速度

pom.xml

@@ -39,63 +39,49 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-aop</artifactId>
         </dependency>
-
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
             <version>2.11.0</version>
         </dependency>
-
-
         <!-- freemarker jar -->
         <dependency>
             <groupId>org.freemarker</groupId>
             <artifactId>freemarker</artifactId>
             <version>2.3.28</version>
         </dependency>
-
         <dependency>
             <groupId>org.mybatis.spring.boot</groupId>
             <artifactId>mybatis-spring-boot-starter</artifactId>
             <version>2.2.2</version>
         </dependency>
-
         <!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter -->
         <dependency>
             <groupId>com.baomidou</groupId>
             <artifactId>mybatis-plus-boot-starter</artifactId>
             <version>3.5.2</version>
         </dependency>
-
-
         <!-- Apache POI -->
         <dependency>
             <groupId>org.apache.poi</groupId>
             <artifactId>poi</artifactId>
             <version>4.1.2</version>
         </dependency>
-
         <dependency>
             <groupId>org.apache.poi</groupId>
             <artifactId>poi-ooxml</artifactId>
             <version>4.1.2</version>
         </dependency>
-
         <dependency>
             <groupId>org.apache.poi</groupId>
             <artifactId>poi-ooxml-schemas</artifactId>
             <version>4.1.2</version>
         </dependency>
-
-
-
-
         <dependency>
             <groupId>com.aliyun.oss</groupId>
             <artifactId>aliyun-sdk-oss</artifactId>
             <version>3.15.1</version>
         </dependency>
-
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
@@ -111,20 +97,17 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
-
         <!-- https://doc.xiaominfo.com/docs/quick-start#openapi2 -->
         <dependency>
             <groupId>com.github.xiaoymin</groupId>
             <artifactId>knife4j-openapi2-spring-boot-starter</artifactId>
             <version>4.4.0</version>
         </dependency>
-
         <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
         </dependency>
-
         <dependency>
             <groupId>cn.hutool</groupId>
             <artifactId>hutool-all</artifactId>
@@ -193,20 +176,23 @@
             <version>2.12.5</version>
             <scope>compile</scope>
         </dependency>
-
-
         <!--easypoi-->
         <dependency>
             <groupId>cn.afterturn</groupId>
             <artifactId>easypoi-spring-boot-starter</artifactId>
             <version>4.1.3</version>
         </dependency>
-
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
             <version>2.8.0</version>
         </dependency>
+        <!--redis-->
+        <dependency>
+            <groupId>org.redisson</groupId>
+            <artifactId>redisson</artifactId>
+            <version>3.13.6</version>
+        </dependency>
     </dependencies>
 
 

src/main/java/com/teaching/backend/controller/records/CourseLearningRecordController.java

@@ -0,0 +1,12 @@
+package com.teaching.backend.controller.records;
+
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/courselearingRecord")
+public class CourseLearningRecordController {
+
+
+}

src/main/java/com/teaching/backend/controller/records/LearningRecordsController.java

@@ -1,6 +1,7 @@
 package com.teaching.backend.controller.records;
 
 
+import com.baomidou.mybatisplus.extension.conditions.query.QueryChainWrapper;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.teaching.backend.common.BaseResponse;
 import com.teaching.backend.common.ResultUtils;
@@ -37,17 +38,19 @@ public class LearningRecordsController {
     public BaseResponse<Page> getAll(@RequestParam(value = "pagenum", defaultValue = "1") int pagenum,
                                      @RequestParam(value = "pagesize", defaultValue = "10") int pagesize,
                                      @RequestParam String userId){
+        //根据用户查询
+        Page<LearningRecords> page = learningRecordsService.query()
+                .orderByDesc("time")
+                .eq("status", "1")
+                .eq("user_id", userId).page(new Page<>(pagenum, pagesize));
+        //获取当前页数据
+        List<LearningRecords> list = page.getRecords();
+        List<LearningRecordsVo> cs= learningRecordsService.getAll(list);
 
-        List<LearningRecordsVo> cs= learningRecordsService.getAll(userId);
+        long total = page.getTotal(); // 总记录数
-        List<LearningRecordsVo> 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));
-        }
-        long total = cs.size(); // 总记录数
         Page<LearningRecordsVo> pageInfo = new Page<>(pagenum,pagesize,total);
-        pageInfo.setRecords(pageCs);
+        pageInfo.setRecords(cs);
-        pageInfo.setPages((int)(Math.ceil((double) total / pagesize)));//设置总页数
+        pageInfo.setPages(page.getPages());//设置总页数
         return ResultUtils.success(pageInfo);
     }
 

src/main/java/com/teaching/backend/model/entity/records/LearningRecords.java

@@ -2,6 +2,7 @@ package com.teaching.backend.model.entity.records;
 
 
 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 lombok.Data;
@@ -36,7 +37,7 @@ public class LearningRecords {
     /**
      * 访问时间
      */
-    private LocalDateTime accessTime;
+    private LocalDateTime time;
 
     /**
      * 学习方式:打开; 1,打开过,2未打开
@@ -74,11 +75,11 @@ public class LearningRecords {
      */
     private String type;
     /**
-     * 父节点
+     * 课程名称
      */
-    private String parentNode;
+    private String coursesName;
-
+    /**
-
+     * 课程名称
-
+     */
-
+    private int number;
 }

src/main/java/com/teaching/backend/model/vo/records/LearningRecordsVo.java

@@ -33,7 +33,7 @@ public class LearningRecordsVo {
     /**
      * 资源观看人数
      */
-    private Long number;
+    private int number;
 
 
     /**

src/main/java/com/teaching/backend/service/impl/records/LearningRecordsServiceImpl.java

@@ -12,7 +12,6 @@ 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.CourseResourcesServiceImpl;
-import com.teaching.backend.service.impl.chapter.ChapterServiceImpl;
 import com.teaching.backend.service.impl.courses.CoursesServiceImpl;
 import com.teaching.backend.service.records.LearningRecordsService;
 import org.springframework.beans.BeanUtils;
@@ -36,8 +35,8 @@ public class LearningRecordsServiceImpl extends ServiceImpl<LearningRecordsMappe
     private LearningRecordsMapper learningRecordsMapper;
     @Autowired
     private CourseResourcesServiceImpl courseResourcesService;
-    @Autowired
+//    @Autowired
-    private ChapterServiceImpl chapterService;
+//    private ChapterServiceImpl chapterService;
 
     @Override
     public IPage<LearningRecords> selectPageList(Page<LearningRecords> page, LearningRecords model) {
@@ -53,76 +52,64 @@ public class LearningRecordsServiceImpl extends ServiceImpl<LearningRecordsMappe
         for (LearningRecords learningRecords : list) {
             learningRecords.setStatus("0");
         }
-        this.updateBatchById(list);
+        updateBatchById(list);
 //        System.out.println(this.updateBatchById(list));
 //        this.remove(lambdaQueryWrapper);
         return "删除成功";
     }
 
     @Override
-    public List<LearningRecordsVo> getAll(String userId){
+    public List<LearningRecordsVo> getAll(List<LearningRecords> list){
-        //格式化时间
+        List<LearningRecordsVo> records = new ArrayList<>();
         //格式化时间
         String strDateFormat = "yyyy-MM-dd HH:mm:ss";
         SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
-
-        List<LearningRecordsVo> list = new ArrayList<>();
-        //将学习记录实体转成学习记录Vo实体
-        LambdaQueryWrapper<LearningRecords> lambdaQueryWrapper1 = new LambdaQueryWrapper<>();
-        lambdaQueryWrapper1
-                .orderByDesc(LearningRecords::getAccessTime)
-                .eq(LearningRecords::getUserId, userId)
-                .eq(LearningRecords::getStatus, "1");
-//        System.out.println("查询数据库结果为:"+this.list(lambdaQueryWrapper1));
         //如果为空-------------------?????
-        for (LearningRecords learningRecords : this.list(lambdaQueryWrapper1)) {
+        list.forEach(learningRecords -> {
-            //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)
+            BeanUtils.copyProperties(learningRecords,learningRecordsVo);//从多传到少(时间需要转格式)
-                //添加时间
+            Date date = Date.from(learningRecords.getTime().atZone(ZoneId.systemDefault()).toInstant());
-                //LocalDateTime转Date
-                Date date = Date.from(learningRecords.getAccessTime().atZone(ZoneId.systemDefault()).toInstant());
             learningRecordsVo.setTime(sdf.format(date));
-                LambdaQueryWrapper<LearningRecords> lambdaQueryWrapper = new LambdaQueryWrapper<>();
+//            //统计记录表里有多少人查看过这门资源
-                lambdaQueryWrapper.eq(LearningRecords::getCoursesId, learningRecords.getCoursesId());
+//            LambdaQueryWrapper<LearningRecords> lambdaQueryWrapper = new LambdaQueryWrapper<>();
-//            System.out.println(learningRecords.getResourceId());
+//            lambdaQueryWrapper.eq(LearningRecords::getCoursesId, learningRecords.getCoursesId());
-//            System.out.println("1");
+//            long count = this.count(lambdaQueryWrapper);
-
+            learningRecordsVo.setNumber(learningRecords.getNumber());
-            String name;
-            //添加课程名称
-            switch (learningRecords.getType()) {
-                case "4": //如果是资源学习
-                    learningRecordsVo.setCoursesName(courseResourcesService.getById(learningRecords.getCoursesId()).getName());//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()).get());
-//                    if (knowledgePointService.getById(learningRecords.getCoursesId()) != null){
-//                        name=knowledgePointService.getById(learningRecords.getCoursesId()).getName();
-//                    }else {
-//                        name = "查无次记录";
-//                    }
-//                    learningRecordsVo.setCoursesName(knowledgePointService.getById(learningRecords.getCoursesId()).getName());
-                    //如果对应的资源不存在
-                    break;
-                case "2": //如果是章节学习记录
-                    learningRecordsVo.setCoursesName(chapterService.getById(learningRecords.getCoursesId()).getName());
-                    //如果对应的资源不存在
-                    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);
-                learningRecordsVo.setNumber(count);
             //把整合后该用户的学习记录添加到List里
-                list.add(learningRecordsVo);
+            records.add(learningRecordsVo);
+        });
+//        for (LearningRecords learningRecords : list) {
+//            //查找该用户的学习记录
+//                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.getTime().atZone(ZoneId.systemDefault()).toInstant());
+//                learningRecordsVo.setTime(sdf.format(date));
+//                LambdaQueryWrapper<LearningRecords> lambdaQueryWrapper = new LambdaQueryWrapper<>();
+//                lambdaQueryWrapper.eq(LearningRecords::getCoursesId, learningRecords.getCoursesId());
+//            String name;
+//            //添加课程名称
+//            switch (learningRecords.getType()) {
+//                case "4": //如果是资源学习
+//                    if (courseResourcesService.getById(learningRecords.getCoursesId()) != null){
+//                        learningRecordsVo.setCoursesName(courseResourcesService.getById(learningRecords.getCoursesId()).getName());
 //                    }
-        }
+//                    break;
-//        System.out.println("查询后结果:"+list);
+//                case "1": //如果是课程学习记录
-        return list;
+//                    if (coursesService.getById(learningRecords.getCoursesId()) != null){
+//                        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);
+//                learningRecordsVo.setNumber(count);
+//                //把整合后该用户的学习记录添加到List里
+//                records.add(learningRecordsVo);
+//        }
+        return records;
     }
 
     /**
@@ -148,14 +135,26 @@ public class LearningRecordsServiceImpl extends ServiceImpl<LearningRecordsMappe
                 .eq(LearningRecords::getCoursesId, coursesId)
                 .eq(LearningRecords::getType, learningRecords.getType());
         long count = this.count(lambdaQueryWrapper);
-        System.out.println("数据库："+count);
+        //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());
+        learningRecords.setTime(LocalDateTime.now());
         //设置默认封面
         if (learningRecords.getContent() == null || learningRecords.getContent().equals("")){
             learningRecords.setContent("img/v2-c57eb7863ec4233f503176ca3f90f8d5_1440w.png");
         }
+        List<LearningRecords> list = query().eq("courses_id", coursesId).eq("type", learningRecords.getType()).list();
+        int number;
+        if (list != null){
+            number = list.get(0).getNumber() + 1;
+            learningRecords.setNumber(number);
+            list.forEach(learningRecords1 -> {
+                learningRecords1.setNumber(number);
+            });
+        } else {
+            number = 0;
+        }
+        updateBatchById(list);
         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());

src/main/java/com/teaching/backend/service/records/LearningRecordsService.java

@@ -10,7 +10,7 @@ import com.teaching.backend.model.vo.records.LearningRecordsVo;
 import java.util.List;
 
 public interface LearningRecordsService extends IService<LearningRecords> {
-    public List<LearningRecordsVo> getAll(String username);
+    public List<LearningRecordsVo> getAll(List<LearningRecords> list);
     public String saveRecords(LearningRecords learningRecords);
     IPage<LearningRecords> selectPageList(Page<LearningRecords> page, LearningRecords model);