Java毕业设计实战之校园一卡通系统的实现

/**
 * 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";
    }
 
}

@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();
    }
 
}

@Controller
@RequestMapping("/captcha")
public class CaptchaController {
 
    private char[] codeSequence = {'A', '1', 'B', 'C', '2', 'D', '3', 'E', '4', 'F', '5', 'G', '6', 'H', '7', 'I', '8', 'J',
            'K', '9', 'L', '1', 'M', '2', 'N', 'P', '3', 'Q', '4', 'R', 'S', 'T', 'U', 'V', 'W',
            'X', 'Y', 'Z'};
 
    @RequestMapping("/code")
    public void getCode(HttpServletResponse response, HttpSession session) throws IOException {
        int width = 80;
        int height = 37;
        Random random = new Random();
        //设置response头信息
        //禁止缓存
        response.setHeader("Pragma", "No-cache");
        response.setHeader("Cache-Control", "no-cache");
        response.setDateHeader("Expires", 0);
 
        //生成缓冲区image类
        BufferedImage image = new BufferedImage(width, height, 1);
        //产生image类的Graphics用于绘制操作
        Graphics g = image.getGraphics();
        //Graphics类的样式
        g.setColor(this.getColor(200, 250));
        g.setFont(new Font("Times New Roman", 0, 28));
        g.fillRect(0, 0, width, height);
        //绘制干扰线
        for (int i = 0; i < 40; i++) {
            g.setColor(this.getColor(130, 200));
            int x = random.nextInt(width);
            int y = random.nextInt(height);
            int x1 = random.nextInt(12);
            int y1 = random.nextInt(12);
            g.drawLine(x, y, x + x1, y + y1);
        }
 
        //绘制字符
        String strCode = "";
        for (int i = 0; i < 4; i++) {
            String rand = String.valueOf(codeSequence[random.nextInt(codeSequence.length)]);
            strCode = strCode + rand;
            g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
            g.drawString(rand, 13 * i + 6, 28);
        }
        //将字符保存到session中用于前端的验证
        session.setAttribute("captcha", strCode.toLowerCase());
        g.dispose();
 
        ImageIO.write(image, "JPEG", response.getOutputStream());
        response.getOutputStream().flush();
    }
 
    public Color getColor(int fc, int bc) {
        Random random = new Random();
        if (fc > 255)
            fc = 255;
        if (bc > 255)
            bc = 255;
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r, g, b);
    }
 
}