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Java毕业设计实战之校园一卡通系统的实现

2022-01-26 | 秩名 | 点击：次

一、项目简述（+需求文档+PPT）

功能：卡管理，卡消费，卡充值，图书借阅，消费，记录，注销等等功能。

二、项目运行

环境配置：

Jdk1.8 + Tomcat8.5 + mysql + Eclispe（IntelliJ IDEA,Eclispe,MyEclispe,Sts都支持）

项目技术：

JSP + Servlet + html+ css + JavaScript + JQuery + Ajax 等等

用户管理操作控制层:

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/**

 * 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 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 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 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 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 query(@RequestBody User user) {

        List 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";

    }

  

}

登录控制层：

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@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 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();

    }

  

}

生成验证码：

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@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);

    }

  

}
原文链接：https://blog.csdn.net/pastclouds/article/details/121883590
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