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 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"; } }

 @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(); } }

 @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); } }