基于 AI 辅助的 Java 在线教育平台设计与实现

Course.java

package com.student.education.entity;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.time.LocalDateTime;

@Data
@NoArgsConstructor
@AllArgsConstructor
@TableName("course")
public class Course {
    @TableId(type = IdType.AUTO)
    private Long id;
    private String courseName;
    private String category;
    private Long teacherId;
    private String description;
    private String coverUrl;
    private LocalDateTime createTime;
    private Integer status;
}

2. 数据传输对象 (DTO)

CourseAddDTO.java

package com.student.education.dto;

import jakarta.validation.constraints.NotBlank;
import jakarta.validation.constraints.NotNull;
import lombok.Data;

@Data
public class CourseAddDTO {
    @NotBlank(message = "课程名称不能为空")
    private String courseName;
    
    @NotBlank(message = "课程分类不能为空")
    private String category;
    
    @NotNull(message = "创建老师 ID 不能为空")
    private Long teacherId;
    
    private String description;
    
    @NotNull(message = "课程状态不能为空")
    private Integer status;
}

3. 业务逻辑实现 (Service)

CourseServiceImpl.java

package com.student.education.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.student.education.dto.CourseAddDTO;
import com.student.education.entity.Course;
import com.student.education.entity.User;
import com.student.education.mapper.CourseMapper;
import com.student.education.mapper.UserMapper;
import com.student.education.service.CourseService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Slf4j
@Service
@RequiredArgsConstructor
public class CourseServiceImpl extends ServiceImpl<CourseMapper, Course> implements CourseService {
    private final CourseMapper courseMapper;
    private final UserMapper userMapper;

    @Override
    @Transactional
    public Course addCourse(CourseAddDTO courseAddDTO) {
        log.info("老师创建课程：老师 ID={}, 课程名称={}", courseAddDTO.getTeacherId(), courseAddDTO.getCourseName());
        User teacher = userMapper.selectById(courseAddDTO.getTeacherId());
        if (teacher == null || teacher.getRole() != 1) {
            throw new RuntimeException("无效的老师账号，无法创建课程");
        }
        Course course = new Course();
        BeanUtils.copyProperties(courseAddDTO, course);
        if (course.getCoverUrl() == null || course.getCoverUrl().isEmpty()) {
            course.setCoverUrl("/static/images/default-course-cover.png");
        }
        course.setCreateTime(java.time.LocalDateTime.now());
        save(course);
        return course;
    }

    @Override
    @Transactional
    public void enrollCourse(Long studentId, Long courseId) {
        log.info("学生报名课程：学生 ID={}, 课程 ID={}", studentId, courseId);
        User student = userMapper.selectById(studentId);
        if (student == null || student.getRole() != 0) {
            throw new RuntimeException("无效的学生账号，无法报名课程");
        }
        Course course = getById(courseId);
        if (course == null || course.getStatus() != 1) {
            throw new RuntimeException("课程不存在或未发布");
        }
        // 保存报名记录逻辑...
    }
}

总结

本方案展示了利用 AI 辅助工具快速构建 Spring Boot 后端系统的流程。通过自然语言描述需求，自动生成符合规范的实体、DTO、VO 及 Service 代码，并结合参数校验与事务控制，显著提升了开发效率。系统支持用户角色管理、课程发布、作业提交等核心功能，适用于中小型在线教育场景。