2140110310
/
teaching_backend
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

查询课程下面的用户信息，代码查询逻辑优化

Browse Source
master
Alan 3 months ago
parent 55777b33a4
commit 3070602cb1
5 changed files with 137 additions and 93 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 2
      src/main/java/com/teaching/backend/model/entity/umsAdmin/UmsStudent.java
  2. 2
      src/main/java/com/teaching/backend/model/vo/message/CourseUserInfVO.java
  3. 212
      src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
  4. 1
      src/main/java/com/teaching/backend/service/impl/message/UserInboxServiceImpl.java
  5. 7
      src/main/java/com/teaching/backend/utils/Chapter/SheetHandler.java

2
src/main/java/com/teaching/backend/model/entity/umsAdmin/UmsStudent.java
Unescape View File

@ -6,6 +6,8 @@ import java.time.LocalDate;
import java.time.LocalDateTime;
import com.baomidou.mybatisplus.annotation.TableId;
import java.io.Serializable;
import io.swagger.models.auth.In;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;

2
src/main/java/com/teaching/backend/model/vo/message/CourseUserInfVO.java
Unescape View File

@ -13,8 +13,6 @@ public class CourseUserInfVO {
private String courseId;
@ApiModelProperty(value = "课程name")
private String courseName;
@ApiModelProperty(value = "与课程有关的用户信息集合")
private List<UserReadMessageTimeVO> usersInf;
}

212
src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
Unescape View File

@ -52,6 +52,7 @@ import java.io.File;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;
import java.util.function.Function;
import java.util.stream.Collectors;
import static com.teaching.backend.constant.RoleConstants.TEACHER_ROLE;
@ -640,57 +641,76 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
}
private List<CourseUserInfVO> queryCourseUserForTeacher(Long userId) {
// 查询所有与该教师相关的课程
List<Courses> teacherCoursesInf = coursesMapper.selectList(
new LambdaQueryWrapper<Courses>()
// 1. 获取该教师负责的所有课程
List<Courses> teacherCoursesInf = coursesMapper.selectList(new LambdaQueryWrapper<Courses>()
.apply("FIND_IN_SET({0}, teacher)", userId)
.select(Courses::getId, Courses::getTeacher)
.select(Courses::getId, Courses::getTeacher, Courses::getName)
);
// 2. 提取所有课程的ID
Set<String> courseIds = teacherCoursesInf.stream()
.map(Courses::getId)
.collect(Collectors.toSet());
// 3. 批量查询所有课程的学生ID
List<StudentCourses> studentCourses = studentCoursesMapper.selectList(
new LambdaQueryWrapper<StudentCourses>().in(StudentCourses::getCourse, courseIds)
);
// 4. 获取所有的学生ID
Set<Long> studentIds = studentCourses.stream()
.map(StudentCourses::getStudent)
.collect(Collectors.toSet());
// 5. 批量查询所有学生的信息
List<UmsStudent> students = umsStudentMapper.selectList(
new LambdaQueryWrapper<UmsStudent>().in(UmsStudent::getUserId, studentIds)
);
// 6. 将学生信息缓存到Map中，Key为学生ID
Map<Long, UmsStudent> studentMap = students.stream()
.collect(Collectors.toMap(UmsStudent::getUserId, Function.identity()));
// 7. 处理教师信息并构建返回结果
List<CourseUserInfVO> courseUserInfVOS = new ArrayList<>();
for (Courses courses : teacherCoursesInf) {
for (Courses course : teacherCoursesInf) {
CourseUserInfVO courseUserInfVO = new CourseUserInfVO();
courseUserInfVO.setCourseId(course.getId());
courseUserInfVO.setCourseName(course.getName());
List<UserReadMessageTimeVO> userReadMessageTimeVOS = new ArrayList<>();
courseUserInfVO.setCourseId(courses.getId());
// 查询与课程相关的所有学生
List<Long> studentIds = studentCoursesMapper.selectList(
new LambdaQueryWrapper<>(StudentCourses.class)
.eq(StudentCourses::getCourse, courses.getId())
).stream().map(StudentCourses::getStudent).collect(Collectors.toList());
// 为每个学生创建一个新的 UserReadMessageTimeVO 对象
for (Long studentId : studentIds) {
UmsStudent umsStudent = umsStudentMapper.selectOne(
new LambdaQueryWrapper<>(UmsStudent.class)
.eq(UmsStudent::getUserId, studentId)
.select(UmsStudent::getName)
);
if (umsStudent == null) {
log.error("用户不存在: {}",studentId);
// 添加学生信息
for (StudentCourses sc : studentCourses) {
if (sc.getCourse().equals(course.getId())) {
UmsStudent student = studentMap.get(sc.getStudent()); // 类型转换
if (student != null) {
UserReadMessageTimeVO userReadMessageTimeVO = new UserReadMessageTimeVO();
userReadMessageTimeVO.setId(student.getUserId());
userReadMessageTimeVO.setReceiverName(student.getName());
userReadMessageTimeVOS.add(userReadMessageTimeVO);
} else {
log.error("学生不存在: {}", sc.getStudent());
throw new BusinessException(ErrorCode.PARAMS_USER_NOTEXISTS);
}
UserReadMessageTimeVO userReadMessageTimeVO = new UserReadMessageTimeVO(); // 在循环中创建新对象
userReadMessageTimeVO.setId(studentId);
userReadMessageTimeVO.setReceiverName(umsStudent.getName());
userReadMessageTimeVOS.add(userReadMessageTimeVO);
}
}
// 为每个教师创建一个新的 UserReadMessageTimeVO 对象
String[] teacherUserIds = courses.getTeacher().split(",");
// 添加教师信息
String[] teacherUserIds = course.getTeacher().split(",");
for (String teacherId : teacherUserIds) {
UmsTeacher umsTeacher = umsTeacherMapper.selectOne(
new LambdaQueryWrapper<UmsTeacher>()
.eq(UmsTeacher::getUserId, teacherId)
new LambdaQueryWrapper<UmsTeacher>().eq(UmsTeacher::getUserId, teacherId)
);
if (umsTeacher == null) {
log.error("教师不存在: {}",teacherId);
throw new BusinessException(ErrorCode.PARAMS_USER_NOTEXISTS);
}
UserReadMessageTimeVO userReadMessageTimeVO = new UserReadMessageTimeVO(); // 在循环中创建新对象
if (umsTeacher != null) {
UserReadMessageTimeVO userReadMessageTimeVO = new UserReadMessageTimeVO();
userReadMessageTimeVO.setId(umsTeacher.getUserId());
userReadMessageTimeVO.setReceiverName(umsTeacher.getName());
userReadMessageTimeVOS.add(userReadMessageTimeVO);
} else {
log.error("教师不存在: {}", teacherId);
throw new BusinessException(ErrorCode.PARAMS_USER_NOTEXISTS);
}
}
courseUserInfVO.setUsersInf(userReadMessageTimeVOS);
@ -700,64 +720,94 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
}
private List<CourseUserInfVO> queryCourseUserForStudent(Long userId) {
// 查询学生所参与的所有课程
List<StudentCourses> studentCoursesList = studentCoursesMapper.selectList(
new LambdaQueryWrapper<StudentCourses>()
.eq(StudentCourses::getStudent, userId)
.select(StudentCourses::getCourse)
// 1. 获取学生参与的所有课程
List<StudentCourses> studentCourses = studentCoursesMapper.selectList(
new LambdaQueryWrapper<StudentCourses>().eq(StudentCourses::getStudent, userId)
);
// 2. 提取所有课程的ID
Set<String> courseIds = studentCourses.stream()
.map(StudentCourses::getCourse)
.collect(Collectors.toSet());
// 3. 批量查询所有课程的信息
List<Courses> coursesList = coursesMapper.selectBatchIds(courseIds);
// 4. 获取所有的教师ID
Set<Long> teacherIds = coursesList.stream()
.flatMap(course -> Arrays.stream(course.getTeacher().split(",")))
.map(Long::parseLong)
.collect(Collectors.toSet());
// 5. 批量查询所有教师的信息
List<UmsTeacher> teachers = umsTeacherMapper.selectList(
new LambdaQueryWrapper<UmsTeacher>().in(UmsTeacher::getUserId, teacherIds)
);
// 6. 将教师信息缓存到Map中，Key为教师ID
Map<Long, UmsTeacher> teacherMap = teachers.stream()
.collect(Collectors.toMap(UmsTeacher::getUserId, Function.identity()));
// 7. 批量查询所有课程的学生信息
List<StudentCourses> allStudentCourses = studentCoursesMapper.selectList(
new LambdaQueryWrapper<StudentCourses>().in(StudentCourses::getCourse, courseIds)
);
// 8. 提取所有学生的ID
Set<Long> allStudentIds = allStudentCourses.stream()
.map(StudentCourses::getStudent)
.collect(Collectors.toSet());
// 9. 批量查询所有学生的信息
List<UmsStudent> students = umsStudentMapper.selectList(
new LambdaQueryWrapper<UmsStudent>().in(UmsStudent::getUserId, allStudentIds)
);
// 10. 将学生信息缓存到Map中，Key为学生ID
Map<Long, UmsStudent> studentMap = students.stream()
.collect(Collectors.toMap(UmsStudent::getUserId, Function.identity()));
// 11. 处理课程信息并构建返回结果
List<CourseUserInfVO> courseUserInfVOS = new ArrayList<>();
for (StudentCourses studentCourse : studentCoursesList) {
for (Courses course : coursesList) {
CourseUserInfVO courseUserInfVO = new CourseUserInfVO();
courseUserInfVO.setCourseId(course.getId());
courseUserInfVO.setCourseName(course.getName());
List<UserReadMessageTimeVO> userReadMessageTimeVOS = new ArrayList<>();
courseUserInfVO.setCourseId(studentCourse.getCourse());
// 查询与课程相关的所有学生
List<Long> studentIds = studentCoursesMapper.selectList(
new LambdaQueryWrapper<>(StudentCourses.class)
.eq(StudentCourses::getCourse, studentCourse.getCourse())
).stream().map(StudentCourses::getStudent).collect(Collectors.toList());
// 为每个学生创建一个新的 UserReadMessageTimeVO 对象
for (Long studentId : studentIds) {
UmsStudent umsStudent = umsStudentMapper.selectOne(
new LambdaQueryWrapper<>(UmsStudent.class)
.eq(UmsStudent::getUserId, studentId)
.select(UmsStudent::getName)
);
if (umsStudent == null) {
log.error("用户不存在: {}", studentId);
// 添加教师信息
String[] courseTeacherIds = course.getTeacher().split(",");
for (String teacherId : courseTeacherIds) {
UmsTeacher umsTeacher = teacherMap.get(Long.valueOf(teacherId));
if (umsTeacher != null) {
UserReadMessageTimeVO userReadMessageTimeVO = new UserReadMessageTimeVO();
userReadMessageTimeVO.setId(umsTeacher.getUserId());
userReadMessageTimeVO.setReceiverName(umsTeacher.getName());
userReadMessageTimeVOS.add(userReadMessageTimeVO);
} else {
log.error("教师不存在: {}", teacherId);
throw new BusinessException(ErrorCode.PARAMS_USER_NOTEXISTS);
}
UserReadMessageTimeVO userReadMessageTimeVO = new UserReadMessageTimeVO(); // 在循环中创建新对象
userReadMessageTimeVO.setId(studentId);
userReadMessageTimeVO.setReceiverName(umsStudent.getName());
userReadMessageTimeVOS.add(userReadMessageTimeVO);
}
// 查询与课程相关的所有教师
Courses course = coursesMapper.selectById(studentCourse.getCourse());
if (course != null) {
String[] teacherUserIds = course.getTeacher().split(",");
for (String teacherId : teacherUserIds) {
UmsTeacher umsTeacher = umsTeacherMapper.selectOne(
new LambdaQueryWrapper<UmsTeacher>()
.eq(UmsTeacher::getUserId, teacherId)
);
if (umsTeacher == null) {
log.error("教师不存在: {}", teacherId);
// 添加学生信息
for (StudentCourses sc : allStudentCourses) {
if (sc.getCourse().equals(course.getId())) {
UmsStudent student = studentMap.get(sc.getStudent()); // 类型转换
if (student != null) {
UserReadMessageTimeVO userReadMessageTimeVO = new UserReadMessageTimeVO();
userReadMessageTimeVO.setId(student.getUserId());
userReadMessageTimeVO.setReceiverName(student.getName());
userReadMessageTimeVOS.add(userReadMessageTimeVO);
} else {
log.error("学生不存在: {}", sc.getStudent());
throw new BusinessException(ErrorCode.PARAMS_USER_NOTEXISTS);
}
UserReadMessageTimeVO userReadMessageTimeVO = new UserReadMessageTimeVO(); // 在循环中创建新对象
userReadMessageTimeVO.setId(umsTeacher.getUserId());
userReadMessageTimeVO.setReceiverName(umsTeacher.getName());
userReadMessageTimeVOS.add(userReadMessageTimeVO);
}
} else {
log.error("课程不存在: {}", studentCourse.getCourse());
throw new BusinessException(ErrorCode.PARAMS_COURSE_NOTEXISTS);
}
courseUserInfVO.setUsersInf(userReadMessageTimeVOS);
@ -766,6 +816,8 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
return courseUserInfVOS;
}
}

1
src/main/java/com/teaching/backend/service/impl/message/UserInboxServiceImpl.java
Unescape View File

@ -56,7 +56,6 @@ public class UserInboxServiceImpl extends ServiceImpl<UserInboxMapper, UserInbox
@Autowired
private UserInboxMapper userInboxMapper;
//TODO 不需要特别指定“已读”或者是“未读”
@Override
public PageDTO<SysMessageVO> queryReceiveMessages(MessagesQuery messagesQuery) {
// 先按用户的id找到其的消息列表 默认看未删除的，（是否读 作为筛选条件后传进去）

7
src/main/java/com/teaching/backend/utils/Chapter/SheetHandler.java
Unescape View File

@ -5,15 +5,8 @@ import com.teaching.backend.exception.BusinessException;
import com.teaching.backend.mapper.chapter.TemporaryChapterMapper;
import com.teaching.backend.model.dto.chapter.ChapterExcelDTO;
import com.teaching.backend.service.chapter.IChapterService;
import jdk.nashorn.internal.ir.IfNode;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.eventusermodel.XSSFSheetXMLHandler;
import org.apache.poi.xssf.usermodel.XSSFComment;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.springframework.transaction.annotation.Transactional;
import java.util.*;

Write Preview
Loading…
Cancel
Save