控制台实现10道100以内的加减法算数运算测试

程序实现了 10道100以内的算术运算测试，答对得10分，答错不得分，选手答题结束可以把数据保存到数据库中，可以选择查询排行榜

程序涉及的技术栈有Java基础知识，MVC三层架构，JDBC，MySQL数据库。

项目结构

模型图

mapper层

userMapper接口

public interface UserMapper {
    //添加比赛用户信息
    int addUser(Connection connection, String username, int score);
    //查询所有用户信息
    List<User> getUsers(Connection connection);
}

userMapperImpl实现类

public class UserMapperImpl implements UserMapper {
    @Override
    public int addUser(Connection connection, String username, int score) {
        PreparedStatement pstm = null;
        int execute = 0;
        try {
            connection.setAutoCommit(false);
            String sql = "insert into user_one values (?,?,?)";
            Object[] params = {null, username, score};
            execute = JdbcUtil.execute(connection, pstm, sql, params);
            if (execute>0){
                connection.commit();
            }
        } catch (SQLException e) {
            e.printStackTrace();
            try {
                connection.rollback();
            } catch (SQLException e1) {
                e1.printStackTrace();
            }
        }finally {
            JdbcUtil.closeResource(connection,pstm);
        }
        return execute;
    }

    @Override
    public List<User> getUsers(Connection connection) {
        PreparedStatement pstm = null;
        ResultSet rs = null;
        ArrayList<User> userList = new ArrayList<>();
        User user;
        try {
            //asc
            String sql = "select username,score from user_one order by score desc";
            Object[] params = {};
            rs = JdbcUtil.execute(connection, rs, pstm, sql, params);
            while (rs.next()){
                user = new User();
                user.setUserName(rs.getString("username"));
                user.setScore(rs.getInt("score"));
                userList.add(user);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return userList;
    }
}

service层

userService接口

public interface UserService {
    //添加比赛用户信息
    boolean addUser(String username, int score);
    //查询所有用户信息
    List<User> getUsers();
}

userServiceImpl实现类

public class UserServiceImpl implements UserService {
    private UserMapper userMapper;

    public UserServiceImpl() {
        this.userMapper = new UserMapperImpl();
    }

    @Override
    public boolean addUser(String username, int score) {
        boolean flag = false;
        Connection connection = JdbcUtil.getConnection();
        if (userMapper.addUser(connection, username, score) > 0) {
            flag = true;
        }
        JdbcUtil.closeResource(connection,null);
        return flag;
    }

    @Override
    public List<User> getUsers() {
        Connection connection = JdbcUtil.getConnection();
        List<User> userList = userMapper.getUsers(connection);
        return userList;
    }
}

controller层

conttroller

public class UserController {
    UserServiceImpl userService = new UserServiceImpl();
    /**
     * 保存个人信息
     * @param username
     * @param score
     */
    public boolean operation(String username,int score){
        return userService.addUser(username, score);
    }

    /**
     * 查询排行榜
     */
    public List<User> getUser(){
        List<User> userList = userService.getUsers();
        return userList;
    }
}

pojo实体类

public class User {
    private String userName;
    private int score;

    public User() {
    }

    public User(String userName, int score) {
        this.userName = userName;
        this.score = score;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public int getScore() {
        return score;
    }

    public void setScore(int score) {
        this.score = score;
    }

    @Override
    public String toString() {
        return "User{" +
                "userName='" + userName + '\'' +
                ", score=" + score +
                '}';
    }
}

view层

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Random random = new Random();
        UserController userController = new UserController();
        //名次
        int ranking = 1;
        //分数
        int score = 0;
        int num1;
        int num2;
        int sum;
        //用户运算结果
        int userSum;

        System.out.println("欢迎来到运算测试比赛！");
        System.out.println("请输入你的姓名：");
        String username = sc.nextLine();

        for (int i = 1; i <= 5; i++) {
            num1 = random.nextInt(101);
            num2 = random.nextInt(101);
            sum = num1-num2;
            System.out.println(num1+"-"+num2+"=");
            System.out.println("请输入你的运算结果");
            userSum = sc.nextInt();
            if (userSum==sum){
                score+=10;
                System.out.println("答对了，得10分");
            }else {
                System.out.println("答错了不得分！");
            }
        }
        for (int j = 1; j <= 5; j++) {
            num1 = random.nextInt(101);
            num2 = random.nextInt(101);
            sum = num1+num2;
            System.out.println(num1+"+"+num2+"=");
            System.out.println("请输入你的运算结果");
            userSum = sc.nextInt();
            if (userSum==sum){
                score+=10;
                System.out.println("答对了，得10分");
            }else {
                System.out.println("答错了不得分！");
            }
        }

        //保存用户信息
        boolean isSuccess = userController.operation(username, score);
        if (isSuccess){
            System.out.println("分数保存成功！");
        }else {
            System.out.println("分数保存失败！");
        }
        //是否查询排行榜
        System.out.println("您是否查询排行榜！  是/否");
        String isExcute = sc.next();
        if ("是".equals(isExcute)){
            List<User> userList = userController.getUser();
            System.out.println("名次  姓名  分数");
            for (User user : userList) {
                System.out.println("第"+ranking+"名:"+user.getUserName()+"\t"+user.getScore());
                ranking++;
            }
        }else {
            System.out.println("感谢参加此次比赛！！");
        }
    }
}

运行结果