肖海南查询个人中心课程前四的课程

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

@@ -142,8 +142,8 @@ public class CoursesController {
 
     @ApiOperation("查询学生列表")
     @PostMapping("/studentList")
-    public CommonResult<HashSet<UmsStudent>> getStudentList(CourseQuery courseQuery){
-        HashSet<UmsStudent> umsStudentList = coursesService.queryStudentList(courseQuery);
+    public CommonResult<LinkedHashSet<UmsStudent>> getStudentList(CourseQuery courseQuery){
+        LinkedHashSet<UmsStudent> umsStudentList = coursesService.queryStudentList(courseQuery);
         return CommonResult.success(umsStudentList);
     }
 

src/main/java/com/teaching/backend/controller/favour/SeCourseFavourController.java

@@ -102,7 +102,7 @@ public class SeCourseFavourController {
     public CommonResult<CoursesVO> newCollect(@RequestParam String userId) {
         CoursesVO newCoursesVO = seCourseFavourService.queryNewCollect(userId);
         if (newCoursesVO == null){
-            CommonResult.failed();
+            CommonResult.failed("用户或角色错误");
         }
         return CommonResult.success(newCoursesVO);
     }

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

@@ -1,18 +1,24 @@
 package com.teaching.backend.controller.records;
 
+import com.teaching.backend.common.CommonResult;
+import com.teaching.backend.model.vo.courses.CoursesVO;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.*;
 
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.teaching.backend.common.BaseResponse;
 import com.teaching.backend.filter.ValidateParams;
 import com.teaching.backend.model.entity.records.CourseLearningRecord;
 import com.teaching.backend.service.impl.records.CourseLearningRecordServiceImpl;
-import io.swagger.annotations.ApiOperation;
-import org.springframework.web.bind.annotation.*;
 
 import javax.annotation.Resource;
 import java.util.List;
 
 @RestController
+@Api(tags = "学习记录接口")
+@Slf4j
 @RequestMapping("/api/courselearingrecord")
 public class CourseLearningRecordController {
     @Resource
@@ -51,4 +57,17 @@ public class CourseLearningRecordController {
         return courseLearningRecordService.removeCoursesRecords(ids);
     }
 
+    /**
+     * 个人中心课程列表
+     * @return
+     */
+    @ApiOperation("查询前4的课程")
+    @PostMapping("/courseList")
+    public CommonResult<List<CoursesVO>> courseList(@RequestParam String userId) {
+        List<CoursesVO> coursesVOList = courseLearningRecordService.queryCourseList(userId);
+        if (coursesVOList == null){
+            CommonResult.failed("用户或角色错误");
+        }
+        return CommonResult.success(coursesVOList);
+    }
 }

src/main/java/com/teaching/backend/controller/umsAdmin/ReportController.java

@@ -11,7 +11,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
 @RestController
-@Api(tags = "ReportController")
+@Api(tags = "主页访问数据接口")
 @RequestMapping("/api/report")
 @Slf4j
 public class ReportController {

src/main/java/com/teaching/backend/mapper/records/CourseLearningRecordMapper.java

@@ -4,6 +4,8 @@ package com.teaching.backend.mapper.records;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.teaching.backend.model.entity.records.CourseLearningRecord;
 
+import java.util.List;
+
 /**
  * <p>
  *  Mapper 接口
@@ -14,4 +16,9 @@ import com.teaching.backend.model.entity.records.CourseLearningRecord;
  */
 public interface CourseLearningRecordMapper extends BaseMapper<CourseLearningRecord> {
 
+    CourseLearningRecord selectNewRecord(String student);
+
+    List<String> selectMaxNumber();
+
+    List<String> selectMaxCourseId(String userId);
 }

src/main/java/com/teaching/backend/model/entity/courses/StudentCourses.java

@@ -31,7 +31,7 @@ public class StudentCourses implements Serializable {
     private Long id;
 
     /**
-     * 学生的username
+     * 学生的userId
      */
     private String student;
 

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

@@ -12,6 +12,7 @@ import com.teaching.backend.model.vo.umsAdmin.UmsStudentVO;
 
 import javax.servlet.http.HttpServletResponse;
 import java.util.HashSet;
+import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 
@@ -45,5 +46,5 @@ public interface ICoursesService extends IService<Courses> {
 
     Map<String, Object> getPagePageSize2(int page, int pageSize);
 
-    HashSet<UmsStudent> queryStudentList(CourseQuery courseQuery);
+    LinkedHashSet<UmsStudent> queryStudentList(CourseQuery courseQuery);
 }

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

@@ -12,6 +12,7 @@ import com.teaching.backend.common.ErrorCode;
 import com.teaching.backend.exception.BusinessException;
 import com.teaching.backend.mapper.chapter.ChapterMapper;
 import com.teaching.backend.mapper.courses.*;
+import com.teaching.backend.mapper.records.CourseLearningRecordMapper;
 import com.teaching.backend.mapper.records.LearningRecordsMapper;
 import com.teaching.backend.mapper.umsAdmin.UmsStudentMapper;
 import com.teaching.backend.mapper.umsAdmin.UmsTeacherMapper;
@@ -20,6 +21,7 @@ import com.teaching.backend.model.dto.courses.CoursesDTO;
 import com.teaching.backend.model.dto.courses.PageDTO;
 import com.teaching.backend.model.entity.chapter.Chapter;
 import com.teaching.backend.model.entity.courses.*;
+import com.teaching.backend.model.entity.records.CourseLearningRecord;
 import com.teaching.backend.model.entity.records.LearningRecords;
 import com.teaching.backend.model.entity.umsAdmin.UmsStudent;
 import com.teaching.backend.model.entity.umsAdmin.UmsTeacher;
@@ -88,9 +90,10 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     ObjectiveContentKnowMapper objectiveContentKnowMapper;
     @Autowired
     private LearningRecordsMapper learningRecordsMapper;
-
     @Autowired
     private AddNeoKnowByCourse addNeoKnowByCourse;
+    @Autowired
+    CourseLearningRecordMapper courseLearningRecordMapper;
 
 
     @Override
@@ -341,20 +344,30 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     }
 
     @Override
-    public HashSet<UmsStudent> queryStudentList(CourseQuery courseQuery) {
+    public LinkedHashSet<UmsStudent> queryStudentList(CourseQuery courseQuery) {
+        String roleId = umsUserMapper.getbyIdRoleId(courseQuery.getUserId());
+        if (roleId.equals("1")){
             PageDTO<CoursesVO> queryCourses = queryCourses(courseQuery);
             List<CoursesVO> coursesList = queryCourses.getList();
             List<String> courseIds = coursesList.stream().map(CoursesVO::getId).collect(Collectors.toList());
-        HashSet<UmsStudent> studentNameList = new HashSet<>();
+            LinkedHashSet<UmsStudent> studentNameList = new LinkedHashSet<>();
             for (String courseId : courseIds) {
                 List<StudentCourses> studentUsernames = studentCoursesMapper.selectBatchSomeStudent(courseId);
+                List<CourseLearningRecord> courseLearningRecordList = new ArrayList<>();
                 for (StudentCourses studentUsername : studentUsernames) {
-                UmsStudent umsStudent = umsStudentMapper.selectByUserId(Integer.valueOf(studentUsername.getStudent()));
+                    CourseLearningRecord courseLearningRecord = courseLearningRecordMapper.selectNewRecord(studentUsername.getStudent());
+                    courseLearningRecordList.add(courseLearningRecord);
+                }
+                courseLearningRecordList = courseLearningRecordList.stream().sorted(Comparator.comparing(CourseLearningRecord::getTimes).reversed()).collect(Collectors.toList());
+                for (CourseLearningRecord courseLearningRecord : courseLearningRecordList) {
+                    UmsStudent umsStudent = umsStudentMapper.selectByUserId(Integer.valueOf(courseLearningRecord.getUserId()));
                     studentNameList.add(umsStudent);
                 }
             }
             return studentNameList;
         }
+        throw new BusinessException(400,"只有老师才有此功能");
+    }
 
     @Override
     public List<CoursesVO> getPagePageSize(int page, int pageSize) {

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

@@ -1,19 +1,22 @@
 package com.teaching.backend.service.impl.records;
 
-
-
 import cn.hutool.core.bean.BeanUtil;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.teaching.backend.common.BaseResponse;
 import com.teaching.backend.common.ResultUtils;
+import com.teaching.backend.mapper.courses.CoursesMapper;
 import com.teaching.backend.mapper.records.CourseLearningRecordMapper;
 import com.teaching.backend.model.entity.courses.CourseLearningNumber;
+import com.teaching.backend.mapper.umsAdmin.UmsUserMapper;
+import com.teaching.backend.model.entity.courses.Courses;
 import com.teaching.backend.model.entity.records.CourseLearningRecord;
 import com.teaching.backend.model.vo.records.CourseLearningRecordsVo;
 import com.teaching.backend.service.impl.courses.CourseLearningNumberServiceImpl;
 import com.teaching.backend.service.impl.courses.CoursesServiceImpl;
+import com.teaching.backend.model.vo.courses.CoursesVO;
 import com.teaching.backend.service.records.ICourseLearningRecordService;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import javax.annotation.Resource;
@@ -39,6 +42,13 @@ public class CourseLearningRecordServiceImpl extends ServiceImpl<CourseLearningR
     private CourseLearningNumberServiceImpl courseLearningNumberService;
     @Resource
     private CoursesServiceImpl  coursesService;
+    @Autowired
+    private UmsUserMapper umsUserMapper;
+    @Autowired
+    private CourseLearningRecordMapper courseLearningRecordMapper;
+    @Autowired
+    private CoursesMapper coursesMapper;
+
     @Override
     public BaseResponse<String> saveCoursesRecords(CourseLearningRecord courseLearningRecord) {
         //课程id
@@ -108,4 +118,29 @@ public class CourseLearningRecordServiceImpl extends ServiceImpl<CourseLearningR
 //        removeBatchByIds(list);
         return ResultUtils.success("删除成功！");
     }
+
+    @Override
+    public List<CoursesVO> queryCourseList(String userId) {
+        String roleId = umsUserMapper.getbyIdRoleId(userId);
+        List<Courses> coursesList = new ArrayList<>();
+        if (roleId.equals("1")){
+            List<String> courseIds = courseLearningRecordMapper.selectMaxNumber();
+            for (String courseId : courseIds) {
+                Courses courses = coursesMapper.selectById(courseId);
+                coursesList.add(courses);
+            }
+            List<CoursesVO> coursesVOList = BeanUtil.copyToList(coursesList, CoursesVO.class);
+            return coursesVOList;
+        } else if (roleId.equals("2")) {
+            List<String> courseIdList = courseLearningRecordMapper.selectMaxCourseId(userId);
+            for (String courseId : courseIdList) {
+                Courses courses = coursesMapper.selectById(courseId);
+                coursesList.add(courses);
+            }
+            List<CoursesVO> coursesVOList = BeanUtil.copyToList(coursesList, CoursesVO.class);
+            return coursesVOList;
+        }else {
+            return null;
+        }
+    }
 }

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

@@ -5,6 +5,9 @@ import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.IService;
 import com.teaching.backend.common.BaseResponse;
 import com.teaching.backend.model.entity.records.CourseLearningRecord;
+import com.teaching.backend.model.vo.courses.CoursesVO;
+
+import java.util.List;
 
 import java.util.List;
 
@@ -24,4 +27,5 @@ public interface ICourseLearningRecordService extends IService<CourseLearningRec
 
     BaseResponse<String> removeCoursesRecords(List<Long> ids);
 
+    List<CoursesVO> queryCourseList(String userId);
 }

src/main/resources/mapper/CourseLearningRecordMapper.xml

@@ -0,0 +1,32 @@
+<?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.records.CourseLearningRecordMapper">
+    <select id="selectNewRecord" resultType="com.teaching.backend.model.entity.records.CourseLearningRecord">
+        SELECT
+            *
+        FROM
+            course_learning_record clr
+        WHERE
+            clr.user_id = #{student}
+        ORDER BY
+            times
+                DESC LIMIT 1;
+    </select>
+    <select id="selectMaxNumber" resultType="java.lang.String">
+        SELECT
+            cln.course_id courseId
+        FROM
+            course_learning_number cln
+        ORDER BY
+            number
+                DESC LIMIT 4;
+    </select>
+    <select id="selectMaxCourseId" resultType="java.lang.String" parameterType="java.lang.String">
+        SELECT course_id, COUNT(*) as frequency
+        FROM course_learning_record
+        WHERE user_id = #{userId}
+        GROUP BY course_id
+        ORDER BY frequency DESC
+            LIMIT 4;
+    </select>
+</mapper>