Java+Mysql的学生管理系统

Java代码部分：

package jdbc1;

//导包

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Scanner;

public class zsgc {
    public static void main(String[] args) {
        //为了让我们的系统一直跑着所以我们要写一个死循环
        while(true){
            //创建一个Scanner的类
            Scanner scanner = new Scanner(System.in);
            System.out.println("学生管理系统\n"+
                    "功能：增删改查\n"+
                    "1、新增\n"+
                    "2、根据id修改\n"+
                    "3、根据id删除\n"+
                    "4、根据id查询数据\n"+
                    "5、查询所有用户\n"+
                    "其他退出");
            String string = scanner.next();
            switch (string){
                case "1":add();break;
                case "2":update();break;
                case "3":delete();break;
                case "4":selectid();break;
                case "5":selectall();break;
                default:
                    System.out.println("输入错误，系统终止");
                    System.exit(0);
            }
        }
    }


    /*
    全部查询
     */
    public static void selectall(){
        //直接调用查询方法
        ArrayList<Student> list = jdbcStudent.selectall();
        for (Student student:
             list) {
            System.out.println(student);
        }
    }



    /*
    用id查询
     */
    public static void selectid(){
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入查询的id");
        //接收数据，使用Scanner
        int id = scanner.nextInt();
        Student student = jdbcStudent.selectid(id);
        System.out.println("查询结果"+student);
    }

    /*
    根据id删除
     */
    public static void delete(){
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入删除的id");
        int id = scanner.nextInt();
        jdbcStudent.delete(id);
    }

    /*
    根据id修改
     */


    public static void update(){
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入修改的id");
        int id = scanner.nextInt();
        System.out.println("请输入修改的账号");
        String account = scanner.next();
        System.out.println("请输入修改的密码");
        String password = scanner.next();
        Student student = new Student(id,account,password);
        //修改
        jdbcStudent.update(student);//调用修改的语句
    }


    public static void add(){
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入账号");
        String account = scanner.next();
        System.out.println("请输入密码");
        String password = scanner.next();
        //为了少写参数可以用实体类进行数据传递
        Student student = new Student (0,account,password);
        jdbcStudent.add(student);
    }
}

Mysql部分：

 结果展示：