1
    /**
2
     * 用户注册功能
3
     * @param username 用户名
4
     * @param password 密码
5
     * @param email 邮箱
6
     * @param userType 用户类型
7
     * @return 注册成功返回用户信息，用户名已存在返回null
8
     */
9
    @Override
10
    public Map<String, Object> register(String username, String nickname, String password, String email, UserTypeEnum userType) {
11

12
        LambdaQueryWrapper<User> userQueryWrapper = new LambdaQueryWrapper<>();
13
        userQueryWrapper.eq(User::getUsername, username);
14
        User existingUser = userMapper.selectOne(userQueryWrapper);
15

16
        if (existingUser != null) {
17
            throw new ApiException(ExceptionEnum.USER_EXIST);
18
        }
19

20
        // 检查邮箱是否已存在
21
        if (email != null && !email.isEmpty()) {
22
            LambdaQueryWrapper<User> emailQueryWrapper = new LambdaQueryWrapper<>();
23
            emailQueryWrapper.eq(User::getEmail, email);
24
            User emailUser = userMapper.selectOne(emailQueryWrapper);
25
            if (emailUser != null) {
26
                throw new ApiException(ExceptionEnum.EMAIL_EXIST);
27
            }
28
        }
29

30
        // 创建新用户
31
        User user = User.builder()
32
                .username(username)
33
                .nickname(nickname)
34
                .password(passwordEncoder.encode(password))
35
                .email(email)
36
                .userType(userType != null ? userType : UserTypeEnum.STUDENT)
37
                .deleted(false)
38
                .createdAt(LocalDateTime.now())
39
                .updatedAt(LocalDateTime.now())
40
                .lastLoginAt(LocalDateTime.now())
41
                .build();
42

43
        userMapper.insert(user);
44

45
        UserSimpleVO userVO = userConverterUtils.toUserSimpleVO(user);
46

47
        // 生成JWT token
48
        UserDetails userDetails = userDetailsService.loadUserByUsername(username);
49
        String token = jwtTokenUtil.generateToken(userDetails);
50

51
        // 返回结果
52
        Map<String, Object> result = new HashMap<>(8);
53
        result.put("token", token);
54
        result.put("user", userVO);
55
        result.put("message", "注册成功");
56

57
        return result;
58
    }

1
    #include <iostream>
2
    using namespace std;
3
    int main(){
4
        int t;
5
        cin >> t;
6
        for (int i = 0; i < t; i++){
7
            int n;
8
            cin >> n;
9
            if (n % 3 == 0){
10
                cout << 0 << endl;
11
            }
12
            else{
13
                cout << 3 - (n % 3) << endl;
14
            }
15
        }
16
        return 0;
17
    }