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Java开发注册登录退出逻辑

Separes 2022-02-24 阅读 51
java开发语言后端

注册逻辑

数据库表

用户信息表

  • user

工具类/配置类

util

MailClient.java 注册邮件发送

@Component
public class MailClient {

    @Autowired
    private JavaMailSender mailSender;

    @Value("${spring.mail.username}")
    private String from;

    public void sendMail(String to, String subject, String content) {
        try {
            MimeMessage message = mailSender.createMimeMessage();
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);
            mailSender.send(helper.getMimeMessage());
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}

CommunityUtil.java 生成UUID用作盐和loginticket

public class CommunityUtil {
    // 生成随机字符串
    public static String generateUUID() {
        return UUID.randomUUID().toString().replaceAll("-", "");
    }

    // MD5加密
    public static String md5(String key) {
        if (StringUtils.isBlank(key)) {
            return null;
        }
        return DigestUtils.md5DigestAsHex(key.getBytes());
    }
}

config

KaptchaConfig.java 使用kaptcha生成图片验证码的config

@Configuration
public class KaptchaConfig {

    @Bean
    public Producer kaptchaProducer() {
        Properties properties = new Properties();
        properties.setProperty("kaptcha.image.width", "100");
        properties.setProperty("kaptcha.image.height", "40");
        properties.setProperty("kaptcha.textproducer.font.size", "32");
        properties.setProperty("kaptcha.textproducer.font.color", "0,0,0");
        properties.setProperty("kaptcha.textproducer.char.string", "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYAZ");
        properties.setProperty("kaptcha.textproducer.char.length", "4");
        properties.setProperty("kaptcha.noise.impl", "com.google.code.kaptcha.impl.NoNoise");

        DefaultKaptcha kaptcha = new DefaultKaptcha();
        Config config = new Config(properties);
        kaptcha.setConfig(config);
        return kaptcha;
    }
}

entity

User.java

public class User {
    private int id;
    private String username;
    private String password;
    private String salt;
    private String email;
    private int type;
    private int status;
    private String activationCode;
    private String headerUrl;
    private Date createTime;
}

Mapper

UserMapper.java

@Mapper
public interface UserMapper {
    User selectById(int id);

    User selectByName(String username);

    User selectByEmail(String email);

    int insertUser(User user);

    int updateStatus(int id, int status);

    int updateHeader(int id, String headerUrl);

    int updatePassword(int id, String password);
}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.community.dao.UserMapper">

    <select id="selectById" resultType="User">
        select id, username, password, salt, email, type, status, activation_code, header_url, create_time
        from user
        where id = #{id}
    </select>

    <select id="selectByName" resultType="User">
        select id, username, password, salt, email, type, status, activation_code, header_url, create_time
        from user
        where username = #{username}
    </select>

    <select id="selectByEmail" resultType="User">
        select id, username, password, salt, email, type, status, activation_code, header_url, create_time
        from user
        where email = #{email}
    </select>

    <insert id="insertUser" parameterType="User" keyProperty="id">
        insert into user (username, password, salt, email, type, status, activation_code, header_url, create_time)
        values(#{username}, #{password}, #{salt}, #{email}, #{type}, #{status}, #{activationCode}, #{headerUrl}, #{createTime})
    </insert>

    <update id="updateStatus">
        update user set status = #{status} where id = #{id}
    </update>

    <update id="updateHeader">
        update user set header_url = #{headerUrl} where id = #{id}
    </update>

    <update id="updatePassword">
        update user set password = #{password} where id = #{id}
    </update>

</mapper>

业务层

@Service
public class UserService{
    //激活成功
    int ACTIVATION_SUCCESS = 0;
    //重复激活
    int ACTIVATION_REPEAT = 1;
    //激活失败
    int ACTIVATION_FAILURE = 2;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private MailClient mailClient;

    @Autowired
    private TemplateEngine templateEngine;
    
    //注册账号
    public Map<String, Object> register(User user) {
        Map<String, Object> map = new HashMap<>();

        // 空值处理
        if (user == null) {
            throw new IllegalArgumentException("参数不能为空!");
        }
        if (StringUtils.isBlank(user.getUsername())) {
            map.put("usernameMsg", "账号不能为空!");
            return map;
        }
        if (StringUtils.isBlank(user.getPassword())) {
            map.put("passwordMsg", "密码不能为空!");
            return map;
        }
        if (StringUtils.isBlank(user.getEmail())) {
            map.put("emailMsg", "邮箱不能为空!");
            return map;
        }

        // 验证账号是否存在
        User u = userMapper.selectByName(user.getUsername());
        if (u != null) {
            map.put("usernameMsg", "该账号已存在!");
            return map;
        }

        // 验证邮箱是否被注册
        u = userMapper.selectByEmail(user.getEmail());
        if (u != null) {
            map.put("emailMsg", "该邮箱已被注册!");
            return map;
        }

        // 注册用户
        user.setSalt(CommunityUtil.generateUUID().substring(0, 5));
        user.setPassword(CommunityUtil.md5(user.getPassword() + user.getSalt()));
        user.setType(0);
        user.setStatus(0);
        user.setActivationCode(CommunityUtil.generateUUID());
        user.setHeaderUrl(String.format("/**image_url**/", new Random().nextInt(1000)));
        user.setCreateTime(new Date());
        userMapper.insertUser(user);

        // 激活邮件
        Context context = new Context();
        context.setVariable("email", user.getEmail());

        String url = "http://localhost:8080/activation/" + user.getId() + "/" + user.getActivationCode();
        context.setVariable("url", url);
        String content = templateEngine.process("/mail/activation", context);
        mailClient.sendMail(user.getEmail(), "激活账号", content);

        return map;
    }
    
    //激活账号
    public int activation(int userId, String code) {
        User user = userMapper.selectById(userId);
        if (user.getStatus() == 1) {
            return ACTIVATION_REPEAT;
        } else if (user.getActivationCode().equals(code)) {
            userMapper.updateStatus(userId, 1);
            return ACTIVATION_SUCCESS;
        } else {
            return ACTIVATION_FAILURE;
        }
    }
}

Controller

@Controller
public class LoginController {
    @PostMapping("/register")
    public String register(Model model, User user) {
        Map<String, Object> map = userService.register(user);
        if (map == null || map.isEmpty()) {
            model.addAttribute("msg", "注册成功,我们已经向您的邮箱发送了一封激活邮件,请尽快激活!");
            model.addAttribute("target", "/index");
            return "/site/operate-result";
        } else {
            log.info("注册失败");
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "/site/register";
        }
    }


    @GetMapping("/activation/{userId}/{code}")
    public String activation(Model model, @PathVariable("userId") int userId, @PathVariable("code") String code) {
        int result = userService.activation(userId, code);
        if (result == ACTIVATION_SUCCESS) {
            model.addAttribute("msg", "激活成功,您的账号已经可以正常使用了!");
            model.addAttribute("target", "/login");
        } else if (result == ACTIVATION_REPEAT) {
            model.addAttribute("msg", "无效操作,该账号已经激活过了!");
            model.addAttribute("target", "/index");
        } else {
            model.addAttribute("msg", "激活失败,您提供的激活码不正确!");
            model.addAttribute("target", "/index");
        }
        return "/site/operate-result";
    }

    @GetMapping("/kaptcha")
    public void getKaptcha(HttpServletResponse response, HttpSession session) {
        //生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);

        // 将验证码存入session
        session.setAttribute("kaptcha", text);

        // 将图片输出给浏览器
        response.setContentType("image/png");
        try{
            OutputStream os = response.getOutputStream();
            ImageIO.write(image, "png", os);
        } catch (IOException e){
            e.printStackTrace();
        }
    }
}

登录逻辑

数据库表

登录凭证表

  • login_tickit

实体类

public class LoginTicket {
    private int id;
    private int userId;
    private String ticket;
    private int status;
    private Date expired;
}

Mapper

LoginTicketMapper.java

@Mapper
public interface LoginTicketMapper {

    int insertLoginTicket(LoginTicket loginTicket);

    LoginTicket selectByTicket(String ticket);

    int updateStatus(String ticket, int status);

}

LoginTocketMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.community.dao.LoginTicketMapper">

    <insert id="insertLoginTicket" parameterType="LoginTicket" useGeneratedKeys = "true" keyProperty="id">
        insert into login_ticket(user_id,ticket,status,expired) values(#{userId},#{ticket},#{status},#{expired})
    </insert>

    <select id="selectByTicket" resultType="LoginTicket">
        select id,user_id,ticket,status,expired from login_ticket where ticket=#{ticket}
    </select>

    <update id="updateStatus">
        update login_ticket set status=#{status} where ticket=#{ticket}
    </update>

</mapper>

业务层

UserService.java（部分）

@Service
public class UserService{
    
    @Autowired
    private UserMapper userMapper;
    
    @Autowired
    private LoginTicketMapper loginTicketMapper;
    
    public Map<String, Object> login(String username, String password, int expiredSeconds) {
        Map<String, Object> map = new HashMap<>();

        // 空值处理
        if (StringUtils.isBlank(username)) {
            map.put("usernameMsg", "账号不能为空!");
            return map;
        }
        if (StringUtils.isBlank(password)) {
            map.put("passwordMsg", "密码不能为空!");
            return map;
        }

        // 验证账号
        User user = userMapper.selectByName(username);
        if (user == null) {
            map.put("usernameMsg", "该账号不存在!");
            return map;
        }

        // 验证状态
        if (user.getStatus() == 0) {
            map.put("usernameMsg", "该账号未激活!");
            return map;
        }

        // 验证密码
        password = CommunityUtil.md5(password + user.getSalt());
        if (!user.getPassword().equals(password)) {
            map.put("passwordMsg", "密码不正确!");
            return map;
        }

        // 生成登录凭证
        LoginTicket loginTicket = new LoginTicket();
        loginTicket.setUserId(user.getId());
        loginTicket.setTicket(CommunityUtil.generateUUID());
        loginTicket.setStatus(0);
        loginTicket.setExpired(new Date(System.currentTimeMillis() + expiredSeconds * 1000));
        loginTicketMapper.insertLoginTicket(loginTicket);

        map.put("ticket", loginTicket.getTicket());
        return map;
    }
}

Controller

LoginController.java（部分）

public class LoginController {
    
    //默认状态的登录凭证的超时时间
    int DEFAULT_EXPIRED_SECONDS = 3600 * 12;

    //记住状态的登录凭证超时时间
    int REMEMBER_EXPIRED_SECONDS = 3600 * 24 * 100;
    
    @Autowired
    private UserService userService;
    
    @PostMapping("/login")
    public String login(String username, String password, String code, boolean rememberme, Model model, HttpSession session, HttpServletResponse response) {
        // 检查验证码
        String kaptcha = (String) session.getAttribute("kaptcha");
        if (StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) || !kaptcha.equalsIgnoreCase(code)) {
            model.addAttribute("codeMsg", "验证码不正确!");
            return "/site/login";
        }

        // 检查账号,密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if (map.containsKey("ticket")) {
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath("/");
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "/site/login";
        }
    }
}

退出逻辑

LoginTicket.java

LoginTicketMapper.java

UserService.java（部分）

public class UserService{
    
    @Autowired
    private LoginTicketMapper loginTicketMapper;
    
    public void logout(String ticket) {
        loginTicketMapper.updateStatus(ticket, 1);
    }
}

LoginController.java（部分）

public class LoginController {
    @GetMapping("/logout")
    public String logout(@CookieValue("ticket") String ticket) {
        userService.logout(ticket);
        return "redirect:/login";
    }
}
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