package aboutdb1;
import java.sql.*;
import java.util.Scanner;
public class newDBsystem {
    private static Connection getConnection() throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver"); // 加载MySQL JDBC驱动
        Connection con = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/db1?serverTimezone=UTC&characterEncoding=utf8&useUnicode=true&useSSL=false",
                "root",
                "123456");// 使用DriverManager获取数据库连接
        return con;
        
    }
    static Scanner sc=new Scanner(System.in);
    //main主类控制执行顺序
    public static void main(String[] args)throws Exception {
        while (true){
            System.out.println("====数仓管理系统=====");
            System.out.println("1.增  2.删  3.改  4.查  5.退出 ");
            int number = sc.nextInt();
            if (number==1){
                addmodel();
            }
            if (number==2){
                delmodel();
            }
            if (number==3){
                updatamodel();
            }
            if (number==4){
                checkmodel();
            }
            if (number==5){
                break;
            }
        }
    }
    //添加功能
    public static void  addmodel() throws Exception {
        Connection con =getConnection();
        System.out.println("===插入界面===");
        System.out.print("id:");
        int id = sc.nextInt();
        System.out.print("name:");
        String name =sc.next();
        System.out.print("count:");
        int count = sc.nextInt();
        System.out.print("price:");
        int price = sc.nextInt();
        PreparedStatement ps =con.prepareStatement("insert into shoping (id,name,count,price) values(?,?,?,?)");
        // 创建PreparedStatement对象
        ps.setInt(1,id);
        ps.setString(2,name);
        ps.setInt(3,count);
        ps.setInt(4,price);
        ps.execute();
        System.out.println("插入成功");
    }
    //查看功能
    public static void  checkmodel() throws Exception {
        Connection con =getConnection();
        String sql = "SELECT * FROM shoping";
        PreparedStatement ps = con.prepareStatement(sql);
        ResultSet rs = ps.executeQuery();
        System.out.println("=================================");
        while (rs.next()) { // 遍历结果集
            // 使用rs.getXXX("columnName")方法获取每一列的值，并打印出来
            System.out.println("ID: " + rs.getInt("id") +
                    ", Name: " + rs.getString("name") +
                    ", count: " + rs.getInt("count") +
                    ", price: " + rs.getInt("price"));
        }
        ps.execute();
        System.out.println("=================================");
    }
    //删除功能
    public static void  updatamodel() throws Exception {
        Connection con =getConnection();
        System.out.println("===修改界面===");
        infoidname();
        System.out.print("请输入所要删除的数据对应id，以及其他字段想要修改的值：");
        System.out.print("id:");
        int id = sc.nextInt();
        System.out.print("其他字段的值：");
        System.out.print("name:");
        String name =sc.next();
        System.out.print("count:");
        int count = sc.nextInt();
        System.out.print("price:");
        int price = sc.nextInt();
        PreparedStatement ps =con.prepareStatement("update shoping set name =?,count =?,price=? where id=?");
        ps.setString(1,name);
        ps.setInt(2,count);
        ps.setInt(3,price);
        ps.setInt(4,id);
        int i=ps.executeUpdate();
        if (i>0){
            System.out.println("修改成功！");
        }
    }
    //修改功能
    public static void  delmodel() throws Exception {
        Connection con =getConnection();
        System.out.println("===删除界面===");
        System.out.print("请输入所要删除的数据对应id：");
        int id = sc.nextInt();
        PreparedStatement ps =con.prepareStatement("delete from shoping where id = ?");
        ps.setInt(1,id);
        ps.execute();
        System.out.println("删除成功");
    }
    //查看id及name
    public static void  infoidname() throws Exception {
        Connection con = getConnection();
        System.out.println("id及名称列表：");
        PreparedStatement ps=con.prepareStatement("select id from shoping");
        ResultSet resultSet = ps.executeQuery();
        while (resultSet.next()){
            System.out.print("id:"+resultSet.getInt("id"));
            System.out.print("       ");
        }
        System.out.println();
        PreparedStatement ps1=con.prepareStatement("select name from shoping");
        ResultSet resultSet1 = ps1.executeQuery();
        while (resultSet1.next()){
            System.out.print("name:"+resultSet1.getString("name"));
            System.out.print("   ");
        }
        System.out.println();

    }
}