【SpringBoot + Freemarker + MySQL】 搭建实验室仪器预约系统

package com.reservation.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.reservation.model.User;
import com.reservation.repository.UserRepository;

import java.util.List;

@Service
public class UserService {
    @Autowired
    private UserRepository userRepository;

    public LoginApplicationReturnEnum doLogin(User user) {
        if (user == null) {
            return LoginApplicationReturnEnum.USER_NOT_EXIST;
        }
        String username = user.getUsername();
        if (username == null || username.equals("")) {
            return LoginApplicationReturnEnum.USER_NOT_EXIST;
        }
        List<User> list = userRepository.findByUsername(username);
        if (list.isEmpty()) {
            return LoginApplicationReturnEnum.USER_NOT_EXIST;
        }
        if (!list.get(0).getPassword().equals(user.getPassword())) {
            return LoginApplicationReturnEnum.WRONG_PASSWORD;
        }
        return LoginApplicationReturnEnum.OK;
    }

    public RegisterApplicationReturnEnum doRegister(User user) {
        if (user == null || user.getUsername() == null || user.getPassword() == null) {
            return RegisterApplicationReturnEnum.EMPTY_INFO;
        }
        String username = user.getUsername();
        String password = user.getPassword();
        if (username.length() < 6 || username.length() > 15 || password.length() < 6 || password.length() > 15) {
            return RegisterApplicationReturnEnum.INVALID_LENGTH;
        }
        if (!username.matches("\\w*") || !password.matches("\\w*")) {
            return RegisterApplicationReturnEnum.INVALID_CHAR;
        }
        List<User> list = userRepository.findByUsername(username);
        if (!list.isEmpty()) {
            return RegisterApplicationReturnEnum.USERNAME_EXIST;
        }
        userRepository.save(user);
        return RegisterApplicationReturnEnum.OK;
    }

}