day 11 2021 3 3 学生管理系统

学生管理系统

main类

package com.wang.API.Student;

import java.util.ArrayList;
import java.util.Scanner;

public class Student {
    public static void main(String[] args) {
        int n = 0;
        int m = 0;
        StudentM stu = new StudentM();
        ArrayList<StudentM> arrayList = new ArrayList<>();
        do {

            //学生系统的主界面
            System.out.println("==欢迎访问学生管理系统==");
            System.out.println("1.添加学生");
            System.out.println("2.删除学生");
            System.out.println("3.修改学生");
            System.out.println("4.查看所有学生");
            System.out.println("5.退出");
            System.out.println("请输入你的选择：");

            Scanner scanner = new Scanner(System.in);
            int way = scanner.nextInt();

            if (way == 1) {
                System.out.println("请输入学生的学号：");
                String id = scanner.next();
                System.out.println("请输入学生的姓名：");
                String name = scanner.next();
                System.out.println("请输入学生的年龄：");
                String age = scanner.next();
                System.out.println("请输入学生的居住地：");
                String address = scanner.next();
                StudentM Student = new StudentM(id, name, age, address);
                arrayList.add(n, Student);
                n++;
                System.out.println("添加学生成功");
            } else if (way == 2){
                System.out.println("请输入你想要删除学生的学号：");
                String newid = scanner.next();
                int h = 0;
                for (int i = 0;i<arrayList.size();i++){
                    StudentM s = arrayList.get(i);
                    if (newid.equals(s.getId())){
                        h = i;
                    }
                }
                arrayList.remove(h);
                System.out.println("删除成功！");
            }else if (way == 3){
                System.out.println("请输入你想要修改学生的学号：");
                String newid = scanner.next();
                int h = 0;
                for (int i = 0;i<arrayList.size();i++){
                    StudentM s = arrayList.get(i);
                    if (newid.equals(s.getId())){
                        h = i;
                    }
                }
                arrayList.remove(h);
                System.out.println("请输入修改后学生的学号：");
                String id = scanner.next();
                System.out.println("请输入修改后学生的姓名：");
                String name = scanner.next();
                System.out.println("请输入修改后学生的年龄：");
                String age = scanner.next();
                System.out.println("请输入修改后学生的居住地：");
                String address = scanner.next();
                StudentM Student = new StudentM(id, name, age, address);
                arrayList.add(h, Student);
                System.out.println("学生修改成功！");
            }else if (way == 4){
                System.out.println("学号       "+"姓名   "+"年龄   "+"居住地   ");
                for (int i = 0;i < arrayList.size();i++){
                    StudentM s = arrayList.get(i);
                    System.out.print(s.getId()+"  ");
                    System.out.print(s.getName()+"   ");
                    System.out.print(s.getAge()+"   ");
                    System.out.println(s.getAddress());
                }
            }else if (way == 5){
                m++;
                break;
            }else {
                System.out.println("您输入的号码有误：");
            }
        }while(m == 0);
        System.out.println("退出成功！");
    }
}

StudentM类

package com.wang.API.Student;
public class StudentM {

    private String id;
    private String name;
    private String age;
    private String address;

    public StudentM() {
    }

    public StudentM(String id, String name, String age, String address) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.address = address;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}