Java项目：基于springboot的在线选课网站—计算机毕业设计

开发工具:IDEA /Eclipse
数据库:MYSQL5.7
应用服务:Tomcat7/Tomcat8
使用框架:springboot+jsp

在学生在线选课系统的实现下，学生在线选课人员能够充分发挥信息化处理的优势，提高日常管理的处理速率。用户一方可以更好的享受信息化处理带来的便利。系统运行能够稳定且高效。并且人机友好程度能够显著提升。

控制器类


@Controller
public class SelectController {

    @Autowired
    private IStudentService studentService;

    @Autowired
    private IStudyService studyService;

    @Autowired
    private IClzService clzService;

//选课功能
    @RequestMapping("/selectClz")
    public String selectClz(HttpServletRequest req) {
        String sId = (String) req.getSession().getAttribute("userId");
        Course c = (Course) req.getSession().getAttribute("course");

        Integer cId = c.getId();
        System.out.println("==cId=="+cId);
        System.out.println("==sId=="+sId);
        String msg = null;
        int rst = studentService.selectCource(sId, cId);
        if (rst==0) {
            msg = "选课成功!";
        } else if(rst==1){
            msg = "已经选过此课!";
        } else if(rst==2){
            msg="该课程已选满!";
        }else{
            msg="未知错误!";
        }
        req.getSession().setAttribute("msg", msg);
        return "detail";
    }
//删除我的选课
    @RequestMapping("/delCourse")
    public synchronized String delClz(HttpServletRequest req){
        try {
            String stuId = (String) req.getSession().getAttribute("userId");
            Integer clzId =Integer.parseInt(req.getParameter("id"));

            studyService.delCourse(stuId,clzId);
            Course c=clzService.getClzById(clzId);
            c.setSelected(c.getSelected()-1);

            clzService.update(c);

        }catch (NumberFormatException e){
            e.printStackTrace();
            return "404";
        }
        req.getSession().setAttribute("msg","删除成功!");
        return "redirect:/showMyClasses";
    }

}