Java项目:课程管理系统(java+SpringBoot+Bettle+Layui+Mysql)

基于SpringBoot+Bettle+Mysql实现的课程管理系统，该系统可以上传图片、视频，在线观看图片和视频，本系统前端使用的是Layui前端框架。

后台管理员功能有:系统管理、课程管理、教师管理、前台菜单管理、轮播图管理、订单管理、通知管理、礼品管理、视频管理等。

前台用户功能：查看课程、查看礼品、购买课程、学习课程、个人中心、注册和登录等。这个系统还可以继续加功能，根据自己的需求去加功能，比如兑换礼品、课程设置价格等，现在系统课程的价格是固定的，如果有能力的话可以自己修改一下。

运行环境：jdk1.8、eclipse/idea、Mysql5.7、Navicat/Sqlyog、Maven3.5/3.6

 

 

 

 

用户管理操作:

/**
 * 用户管理操作
 */
@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    /**
     * 用户添加页面
     * @return
     */
    @GetMapping("/add")
    public String create() {
        return "user/add";
    }

    /**
     * 用户添加操作
     * @param user
     * @return
     */
    @PostMapping("/add")
    @ResponseBody
    public Map<String, Object> add(@RequestBody User user) {
        if(StringUtils.isEmpty(user.getUserName())){
            return MapControl.getInstance().error("请填写用户名").getMap();
        }
        if(StringUtils.isEmpty(user.getName())){
            return MapControl.getInstance().error("请填写名称").getMap();
        }
        if(StringUtils.isEmpty(user.getUserPwd())){
            return MapControl.getInstance().error("请填写密码").getMap();
        }
        int result = userService.create(user);
        if (result <= 0) {
            return MapControl.getInstance().error().getMap();
        }
        return MapControl.getInstance().success().getMap();
    }

    /**
     * 根据id删除
     * @param id
     * @return
     */
    @PostMapping("/delete/{id}")
    @ResponseBody
    public Map<String, Object> delete(@PathVariable("id") Integer id) {
        int result = userService.delete(id);
        if (result <= 0) {
            return MapControl.getInstance().error().getMap();
        }
        return MapControl.getInstance().success().getMap();
    }

    //批量删除
    @PostMapping("/delete")
    @ResponseBody
    public Map<String, Object> delete(String ids) {
        int result = userService.delete(ids);
        if (result <= 0) {
            return MapControl.getInstance().error().getMap();
        }
        return MapControl.getInstance().success().getMap();
    }

    /**
     * 编辑用户信息操作
     * @param user
     * @return
     */
    @PostMapping("/edit")
    @ResponseBody
    public Map<String, Object> edit(@RequestBody User user) {
        if(StringUtils.isEmpty(user.getUserName())){
            return MapControl.getInstance().error("请填写用户名").getMap();
        }
        if(StringUtils.isEmpty(user.getName())){
            return MapControl.getInstance().error("请填写名称").getMap();
        }
        if(StringUtils.isEmpty(user.getUserPwd())){
            return MapControl.getInstance().error("请填写密码").getMap();
        }
        int result = userService.update(user);
        if (result <= 0) {
            return MapControl.getInstance().error().getMap();
        }
        return MapControl.getInstance().success().getMap();
    }

    /**
     * 根据id查询，跳转修改页面
     * @param id
     * @param modelMap
     * @return
     */
    @GetMapping("/edit/{id}")
    public String edit(@PathVariable("id") Integer id, ModelMap modelMap) {
        User user = userService.detail(id);
        modelMap.addAttribute("user", user);
        return "user/edit";
    }

    //查询所有
    @PostMapping("/query")
    @ResponseBody
    public Map<String, Object> query(@RequestBody User user) {
        List<User> list = userService.query(user);
        Integer count = userService.count(user);
        return MapControl.getInstance().success().page(list, count).getMap();
    }

    //跳转列表页面
    @GetMapping("/list")
    public String list() {
        return "user/list";
    }

}

学生管理控制层：

@Controller
@RequestMapping("/student")
public class StudentController {

    private static final String LIST = "student/list";

    @Autowired
    private StudentService studentService;
    @Autowired
    private SubjectService subjectService;
    @Autowired
    private ClazzService clazzService;

    //跳转添加页面
    @GetMapping("/add")
    public String add(ModelMap modelMap) {
        //查询所有的专业，存储到request域
        List<Subject> subjects = subjectService.query(null);
        modelMap.addAttribute("subjects", subjects);
        return "student/add";
    }

    /**
     * 学生添加操作
     * @param student
     * @return
     */
    @PostMapping("/add")
    @ResponseBody
    public Map<String, Object> add(@RequestBody Student student) {
        if(StringUtils.isEmpty(student.getStuName())){
            return MapControl.getInstance().error("请填写姓名").getMap();
        }
        if(StringUtils.isEmpty(student.getJoinDate())){
            return MapControl.getInstance().error("请填写入学时间").getMap();
        }
        if(StringUtils.isEmpty(student.getStuPwd())){
            return MapControl.getInstance().error("请填写密码").getMap();
        }
        if(StringUtils.isEmpty(student.getCardNo())){
            return MapControl.getInstance().error("请填写身份证号").getMap();
        }
        if(StringUtils.isEmpty(student.getPhone())){
            return MapControl.getInstance().error("请填写手机号码").getMap();
        }
        Integer maxId = studentService.maxId();
        if(maxId==null){
            maxId=0;
        }
        student.setStuNo(StringUtil.randomNumber("",maxId));
        //设置学生的状态
        student.setStatus(Student.StatusType.type_1);
        int result = studentService.create(student);
        if (result <= 0) {
            return MapControl.getInstance().error().getMap();
        }
        return MapControl.getInstance().success().getMap();
    }

    //根据id查询
    @PostMapping("/delete/{id}")
    @ResponseBody
    public Map<String, Object> delete(@PathVariable("id") Integer id) {
        int result = studentService.delete(id);
        if (result <= 0) {
            return MapControl.getInstance().error().getMap();
        }
        return MapControl.getInstance().success().getMap();
    }

    //删除操作
    @PostMapping("/delete")
    @ResponseBody
    public Map<String, Object> delete(String ids) {
        int result = studentService.delete(ids);
        if (result <= 0) {
            return MapControl.getInstance().error().getMap();
        }
        return MapControl.getInstance().success().getMap();
    }

    /**
     * 学生修改操作
     * @param student
     * @return
     */
    @PostMapping("/edit")
    @ResponseBody
    public Map<String, Object> edit(@RequestBody Student student) {
        if(StringUtils.isEmpty(student.getStuName())){
            return MapControl.getInstance().error("请填写姓名").getMap();
        }
        if(StringUtils.isEmpty(student.getJoinDate())){
            return MapControl.getInstance().error("请填写入学时间").getMap();
        }
        if(StringUtils.isEmpty(student.getCardNo())){
            return MapControl.getInstance().error("请填写身份证号").getMap();
        }
        if(StringUtils.isEmpty(student.getPhone())){
            return MapControl.getInstance().error("请填写手机号码").getMap();
        }
        int result = studentService.saveU(student);
        if (result <= 0) {
            return MapControl.getInstance().error().getMap();
        }
        return MapControl.getInstance().success().getMap();
    }

    //根据id查询，跳转修改页面
    @GetMapping("/edit/{id}")
    public String detail(@PathVariable("id") Integer id, ModelMap modelMap) {
        //查询出要修改的学生的信息
        Student student = studentService.detail(id);
        //查询所有的专业
        List<Subject> subjects = subjectService.query(null);
        //将查询出来的数据存储到request域，实现表单回显
        modelMap.addAttribute("student", student);
        modelMap.addAttribute("subjects", subjects);
        return "student/edit";
    }

    //查询所有
    @PostMapping("/query")
    @ResponseBody
    public Map<String, Object> query(@RequestBody Student student) {
        //查询所有的学生信息
        List<Student> list = studentService.query(student);
        //查询所有的专业
        List<Subject> subjects = subjectService.query(null);
        //查询所有的班级
        List<Clazz> clazzes = clazzService.query(null);
        //设置关联
        list.forEach(entity -> {
            subjects.forEach(subject -> {
                //判断学生表中的subjectId和专业表的id是否一致
                if (subject.getId() == entity.getSubjectId()) {
                    entity.setSubject(subject);
                }
            });
            clazzes.forEach(clazz -> {
                //判断学生表中的clazzId和班级表的id是否一致
                if (clazz.getId() == entity.getClazzId()) {
                    entity.setClazz(clazz);
                }
            });
        });
        //查询总记录条数
        Integer count = studentService.count(student);
        return MapControl.getInstance().success().page(list, count).getMap();
    }

    //跳转列表页面
    @GetMapping("/list")
    public String list() {
        return "student/list";
    }

    //跳转查询学生页面
    @GetMapping("/teacher_student")
    public String teacher_student(ModelMap modelMap, HttpSession session) {
        //查询所有的专业
        List<Subject> subjects = subjectService.query(null);
        //查询所有的班级
        List<Clazz> clazzes = clazzService.query(null);
        Teacher teacher = (Teacher) session.getAttribute("user");
        modelMap.addAttribute("subjects", subjects);
        modelMap.addAttribute("clazzes", clazzes);
        modelMap.addAttribute("teacher", teacher);
        return "student/teacher_student";
    }

    //老师查询学生
    @PostMapping("/teacher_student")
    @ResponseBody
    public Map<String, Object> teacher_student(Integer clazzId, Integer subjectId, ModelMap modelMap, HttpSession session) {
        Teacher teacher = (Teacher) session.getAttribute("user");
        List<Student> students = studentService.queryStudentByTeacher(teacher.getId(), clazzId, subjectId);
        List<Subject> subjects = subjectService.query(null);
        List<Clazz> clazzes = clazzService.query(null);
        //设置关联
        students.forEach(entity -> {
            subjects.forEach(subject -> {
                //判断学生表的subjectId和专业表的id是否一致
                if (subject.getId() == entity.getSubjectId()) {
                    entity.setSubject(subject);
                }
            });
            clazzes.forEach(clazz -> {
                //判断学生表的clazzId和班级表的id是否一致
                if (clazz.getId() == entity.getClazzId()) {
                    entity.setClazz(clazz);
                }
            });
        });
        return MapControl.getInstance().success().add("data", students).getMap();
    }
}

登录管理控制层：

@Controller
public class LoginController {

    @Autowired
    private UserService userService;
    @Autowired
    private TeacherService teacherService;
    @Autowired
    private StudentService studentService;

    //跳转登录页面
    @GetMapping("/login")
    public String login() {
        return "login";
    }

    //登录操作
    @PostMapping("/login")
    @ResponseBody
    public Map<String, Object> login(String userName, String password, String captcha, String type, HttpSession session) {
        //判断用户名、密码、用户类型、验证码是否为空
        if (StringUtils.isEmpty(userName) || StringUtils.isEmpty(password) || StringUtils.isEmpty(captcha) || StringUtils.isEmpty(type)) {
            return MapControl.getInstance().error("用户名或密码不能为空").getMap();
        }
        //获取系统生成的验证码
        String _captcha = (String) session.getAttribute("captcha");
        //先判断验证码是否正确
        if (!(captcha.toLowerCase()).equals(_captcha.toLowerCase())) {
            //验证码错误
            return MapControl.getInstance().error("验证码错误").getMap();
        }

        //判断用户类型
        if ("1".equals(type)) { //管理员验证登录
            User user = userService.login(userName, MD5Utils.getMD5(password)); //对密码进行加密处理，因为数据库中存储的是加密后的密码
            if (user != null) {
                session.setAttribute("user", user);
                session.setAttribute("type", 1);
                return MapControl.getInstance().success().add("data", user).getMap();
            } else {
                return MapControl.getInstance().error("用户名或密码错误").getMap();
            }
        }
        if ("2".equals(type)) { //老师验证登录
            Teacher teacher = teacherService.login(userName, MD5Utils.getMD5(password));
            if (teacher != null) {
                session.setAttribute("user", teacher);
                session.setAttribute("type", "2");
                return MapControl.getInstance().success().add("data", teacher).getMap();
            } else {
                return MapControl.getInstance().error("用户名或密码错误").getMap();
            }
        }
        if ("3".equals(type)) { //学生验证登录
            Student student = studentService.login(userName, MD5Utils.getMD5(password));
            if (student != null) {
                session.setAttribute("user", student);
                session.setAttribute("type", "3");
                return MapControl.getInstance().success().add("data", student).getMap();
            } else {
                return MapControl.getInstance().error("用户名或密码错误").getMap();
            }
        }
        return MapControl.getInstance().getMap();
    }

}