spring boot ems案例用户注册功能

用户注册功能部分代码:

实体类:

package com.baizhi.entity;

public class User {
    private Integer id;
    private String username;
    private String realname;
    private String password;
    private Boolean gender;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getRealname() {
        return realname;
    }

    public void setRealname(String realname) {
        this.realname = realname;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Boolean getGender() {
        return gender;
    }

    public void setGender(Boolean gender) {
        this.gender = gender;
    }

    public User() {
    }

    public User(Integer id, String username, String realname, String password, Boolean gender) {
        this.id = id;
        this.username = username;
        this.realname = realname;
        this.password = password;
        this.gender = gender;
    }

}

service:

package com.baizhi.service;

import com.baizhi.dao.UserDao;
import com.baizhi.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.DigestUtils;
import org.springframework.util.ObjectUtils;

import java.nio.charset.StandardCharsets;

@Service
@Transactional
public class UserServiceImpl implements UserService{

    private UserDao userDao;

    @Autowired
    public UserServiceImpl(UserDao userDao) {
        this.userDao = userDao;
    }

    @Override
    public void register(User user) {
        //1.根据用户名查询数据库是否存在该用户名
        User userDB = userDao.findByUserName(user.getUsername());
        if(!ObjectUtils.isEmpty(userDB)) throw new RuntimeException("用户名已存在!");
        //进行注册 注册之前给明文密码加密
        String passwordSecret = DigestUtils.md5DigestAsHex(user.getPassword().getBytes(StandardCharsets.UTF_8));
        user.setPassword(passwordSecret);
        userDao.save(user);

    }
    
}

controller: 注册功能:

   /*
    * 用户注册
    *
    * */
    @RequestMapping("register")
    public String register(User user,String code,HttpSession session) throws UnsupportedEncodingException {
        log.debug("接收到验证码:{}",code);
        log.debug("用户名：{}，真实姓名：{}，密码:{},性别:{}",user.getUsername(),user.getRealname(),user.getPassword(),user.getGender());

        try {
            //1.比较验证码输入是否一致
            String sessionCode = session.getAttribute("code").toString();
            if(!sessionCode.equalsIgnoreCase(code)) throw new RuntimeException("验证码输入错误!");
            //2.注册用户
            userService.register(user);
        } catch (RuntimeException e) {
            e.printStackTrace();
            return "redirect:/regist.jsp?msg="+ URLEncoder.encode(e.getMessage(),"UTF-8");
        }

        return "redirect:/login.jsp";
    }