多模块项目使用springboot框架进行业务处理

项目目录

1、在Result定义返回结果

package com.edu.result;

import lombok.Data;

import java.io.Serializable;

/**
 * 后端统一返回结果
 * @param <T>
 */
@Data
public class Result<T> implements Serializable {

    private Integer code; //编码：1成功，0和其它数字为失败
    private String msg; //错误信息
    private T data; //数据

    public static <T> Result<T> success() {
        Result<T> result = new Result<T>();
        result.code = 1;
        return result;
    }

    public static <T> Result<T> success(T object) {
        Result<T> result = new Result<T>();
        result.data = object;
        result.code = 1;
        return result;
    }

    public static <T> Result<T> error(String msg) {
        Result result = new Result();
        result.msg = msg;
        result.code = 0;
        return result;
    }

}

2、写实体类（entity,和表中的属性一一对应）

package com.edu.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Class {
    private String classId;
    private int classSize;
    private String headTeacher;
    private int attendanceTimes;
    private int focus;
}

3、在（vo）中定义类，写自己想要返回的属性

package com.edu.vo;

import io.swagger.models.auth.In;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class AbsentStuVo {
    private String personName;
    private String studentId;
    private String classId;
    private Integer attendanceStatus;
    private String headTeacher;
    private String attendRate;
}

3、书写mapper层

package com.edu.mapper;

import com.edu.vo.*;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

import java.util.List;


@Mapper
public interface StudentMapper {
    /**
     * 根据学生id显示请假列表
     * @param studentId
     * @return
     */

    @Select("select start_time, end_time, reason, leave_status, submit_time from leave_applications where student_id=#{studentId}")
    List<LeaveApplicationsVo> listLeaveApplications(String studentId);

    /**
     * 根据学生id显示迟到列表
     * @param studentId
     * @return
     */

    @Select("select  l.late_date,c.course_session,c.course_name , l.teacher,l.entry_time,l.late_duration from late_attendance l left join course c on c.course_id=l.course_id where l.student_id=#{studentId}")
    List<LateAttendanceVo> listLateAttendance(String studentId);

    /**
     *根据学生id显示旷课列表
     * @param studentId
     * @return
     */
    @Select("select  a.absence_date,a.class_period,u.course_name,a.teacher from absence_record a left join course u on u.course_id=a.course_id where a.student_id=#{studentId}")
    List<AbsenceRecordVo> listAbsenceRecord(String studentId);

    /**
     * 请假列表详情
     * @param studentId
     * @return
     */
    @Select("select l.student_id, s.student_name, l.start_time,l.end_time,l.reason,l.leave_status from leave_applications l left join student s on l.student_id=s.student_id where l.student_id=#{studentId}")
    List<LeaveApplicationsdetailVo> LeaveApplicationsdetail(String studentId);


    /**
     * 根据学生id查询该学生各科的缺勤次数
     * @param studentId
     * @return
     */
    @Select("SELECT c.course_name, IFNULL(COUNT( DISTINCT a.absent_id), 0) AS absence_count FROM course c LEFT JOIN absent_students a ON c.course_id = a.course_id AND a.student_id = #{studentId} GROUP BY c.course_name")
    List<CourseAbsenceCountVo> viewAbsenceCountsForSubjects(String studentId);

    /**
     * 根据学生id查询学生信息
     * @param studentId
     * @return
     */
    @Select("SELECT s.student_id, s.student_name, c.class_name, c.head_teacher," +
            " (pa.attendance_count /(pa.attendance_count + pa.leave_count+pa.absent_count)) * 100 AS attendance_rate  " +
            "FROM  student s JOIN  class c ON s.class_id = c.class_id  JOIN personal_attendance pa ON s.student_id = pa.student_id " +
            "WHERE s.student_id = #{studentId}")

    List<StudentDetailVO> viewStudentDetail(String studentId);

    /**
     * 申请请假
     * @param studentId 学生id
     * @param startTime 开始时间
     * @param endTime 结束时间
     * @param reason 原因
     * @return
     */
    @Insert("INSERT INTO leave_applications (student_id, start_time, end_time, reason, submit_time)" +
            "VALUES (#{studentId}, #{startTime}, #{endTime}, #{reason}, NOW())")
    Integer insertLeaveRequest(String studentId, String startTime, String endTime, String reason);
}

4、编写service层

package com.edu.service;

import com.edu.result.Result;
import com.edu.vo.*;

import java.util.List;

public interface StudentService {
    /**
     * 根据学生id显示请假列表
     * @param studentId
     * @return
     */
    List<LeaveApplicationsVo> listLeaveApplications(String studentId);

    /**
     * 根据学生id显示迟到列表
     * @param studentId
     * @return
     */
    List<LateAttendanceVo> listLateAttendance(String studentId);

    /**
     * 根据学生id显示旷课列表
     * @param studentId
     * @return
     */
    List<AbsenceRecordVo> listAbsenceRecord(String studentId);

    /**
     * 请假列表详情
     * @param studentId
     * @return
     */
    List<LeaveApplicationsdetailVo> LeaveApplicationsdetail(String studentId);

    /**
     * 根据学生id查询该学生各科的缺勤次数
     * @param studentId
     * @return
     */
    List<CourseAbsenceCountVo> viewAbsenceCountsForSubjects(String studentId);

    /**
     * 根据学生id查询学生信息
     * @param studentId
     * @return
     */
    List<StudentDetailVO> viewStudentDetail(String studentId);

    /**
     * 申请请假
     * @param studentId 学生id
     * @param startTime 开始时间
     * @param endTime 结束时间
     * @param reason 原因
     * @return
     */
    Result insertLeaveRequest(String studentId, String startTime, String endTime, String reason);

}

5、编写service层逻辑

package com.edu.service.Impl;

import com.edu.mapper.StudentMapper;
import com.edu.result.Result;
import com.edu.service.StudentService;
import com.edu.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
@Slf4j
public class StudentServiceImpl implements StudentService {
    @Autowired
    private StudentMapper studentMapper;

    /**
     * 根据学生id显示请假列表
     * @param studentId
     * @return
     */
    @Override
    public List<LeaveApplicationsVo> listLeaveApplications(String studentId){

        return studentMapper.listLeaveApplications(studentId);
    }

    /**
     * 根据学生id显示迟到列表
     * @param studentId
     * @return
     */
    @Override
    public  List<LateAttendanceVo> listLateAttendance(String studentId){

        return studentMapper.listLateAttendance(studentId);
    }

    /**
     * 根据学生id显示旷课列表
     * @param studentId
     * @return
     */
    @Override
    public  List<AbsenceRecordVo> listAbsenceRecord(String studentId){

        return studentMapper.listAbsenceRecord(studentId);
    }

    /**
     * 请假列表详情
     * @param studentId
     * @return
     */
    @Override
    public List<LeaveApplicationsdetailVo> LeaveApplicationsdetail(String studentId){
        return studentMapper.LeaveApplicationsdetail(studentId);
    }

    /**
     * 根据学生id查询该学生各科的缺勤次数
     * @param studentId
     * @return
     */
    @Override
    public List<CourseAbsenceCountVo> viewAbsenceCountsForSubjects(String studentId){
        return studentMapper.viewAbsenceCountsForSubjects(studentId);
    }

    /**
     * 根据学生id查询学生信息
     * @param studentId
     * @return
     */
    @Override
    public  List<StudentDetailVO> viewStudentDetail(String studentId){
        return studentMapper.viewStudentDetail(studentId);
    }

    /**
     * 申请请假
     * @param studentId 学生id
     * @param startTime 开始时间
     * @param endTime 结束时间
     * @param reason 原因
     * @return
     */
    @Override
    public Result insertLeaveRequest(String studentId, String startTime, String endTime, String reason){
        try {

            int deletedCount = studentMapper.insertLeaveRequest(studentId,startTime,endTime,reason);
            if (deletedCount == 0) {
                return Result.error("插入失败");
            } else {
                return Result.success("插入成功");
            }
        } catch (Exception e) {
            // 记录异常或进行其他处理
            return Result.error("插入时发生错误：" + e.getMessage());
        }
    }


}

6、编写控制层（controller）

package com.edu.controller;

import com.edu.result.Result;
import com.edu.service.StudentService;
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.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/attendance/student")
@Slf4j
public class StudentController {
    @Autowired
    private StudentService studentService;

    /**
     * 根据学生id显示请假列表
     * @param studentId
     * @return
     */
    @GetMapping("/listLeaveApplications")
    public Result listLeaveApplications(String studentId)  {
        return Result.success(studentService.listLeaveApplications(studentId));
    }

    /**
     * 根据学生id显示迟到列表
     * @param studentId
     * @return
     */
    @GetMapping("/listLateAttendance")
    public Result listLateAttendance(String studentId)  {
        return Result.success(studentService.listLateAttendance(studentId));
    }

    /**
     * 根据学生id显示旷课列表
     * @param studentId
     * @return
     */
    @GetMapping("/listAbsenceRecord")
    public Result listAbsenceRecord(String studentId)  {
        return Result.success(studentService.listAbsenceRecord(studentId));
    }

    /**
     * 请假列表详情
     * @param studentId
     * @return
     */
    @GetMapping("/viewLeaveApplications")
    public Result LeaveApplicationsdetail(String studentId)  {
        return Result.success(studentService.LeaveApplicationsdetail(studentId));
    }

    /**
     * 根据学生id查询该学生各科的缺勤次数
     * @param studentId
     * @return
     */
    @GetMapping("/viewAbsenceCountsForSubjects")
    public Result viewAbsenceCountsForSubjects(String studentId)  {
        return Result.success(studentService.viewAbsenceCountsForSubjects(studentId));
    }

    /**
     * 根据学生id查询学生信息
     * @param studentId
     * @return
     */
    @GetMapping("/viewStudentDetail")
    public Result viewStudentDetail(String studentId)  {
        return Result.success(studentService.viewStudentDetail(studentId));
    }

    /**
     * 申请请假
     * @param studentId 学生id
     * @param startTime 开始时间
     * @param endTime 结束时间
     * @param reason 原因
     * @return
     */
    @PostMapping("/insertLeaveRequest")
    public Result insertLeaveRequest(String studentId, String startTime, String endTime, String reason)  {
        return Result.success(studentService.insertLeaveRequest(studentId,startTime,endTime,reason));
    }

}