学生管理系统案例需求

学生管理系统项目演示

package com.itheima;

public class Student {
    private String sid;
    private String name;
    private String age;
    private String address;

    public Student() {
        super();
    }

    public Student(String sid, String name, String age, String address) {
        super();
        this.sid = sid;
        this.name = name;
        this.age = age;
        this.address = address;
    }

    public String getSid() {
        return sid;
    }

    public void setSid(String sid) {
        this.sid = sid;
    }

    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;
    }

}

package com.itheima;

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

public class StudentManangerTest {
    public static void main(String[] args) {
        ArrayList<Student> array = new ArrayList<Student>();
        while (true) {
            System.out.println("--------欢迎来到学生管理系统,请选择：--------");
            System.out.println("1 查看所有学生");
            System.out.println("2 添加学生");
            System.out.println("3 删除学生");
            System.out.println("4 修改学生");
            System.out.println("5 退出");
            System.out.println("请输入你的选择：");
            Scanner sc = new Scanner(System.in);
            String choiceString = sc.nextLine();
            switch (choiceString) {
            case "1":
                findAllStudent(array);
                break;
            case "2":
                addStudent(array);
                break;
            case "3":
                deleteStudent(array);
                break;
            case "4":
                updateStudent(array);
                break;
            case "5":
            default:
                System.out.println("谢谢你的使用 ");
                System.exit(0);
                break;
            }
        }
    }

    private static void updateStudent(ArrayList<Student> array) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入你要修改学生的学号：");
        String sid = sc.nextLine();
        int index = -1;
        for (int x = 0; x < array.size(); x++) {
            Student s = array.get(x);
            if (s.getSid().equals(sid)) {
                index = x;
                break;
            }
        }
        if (index != -1) {
            System.out.println("请输入新姓名：");
            String name = sc.nextLine();
            System.out.println("请输入新年龄：");
            String age = sc.nextLine();
            System.out.println("请输入新地址：");
            String address = sc.nextLine();
            Student s = new Student();
            s.setSid(sid);
            s.setName(name);
            s.setAge(age);
            s.setAddress(address);
            array.set(index, s);
            System.out.println("修改学生成功");
        } else {
            System.out.println("不好意思,你要修改的学号对应的学生信息不存在，请回去重新选择你的操作");
            return;
        }
    }

    private static void deleteStudent(ArrayList<Student> array) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入你要删除学生的学号：");
        String sid = sc.nextLine();
        int index = -1;
        for (int x = 0; x < array.size(); x++) {
            Student s = array.get(x);
            if (s.getSid().equals(sid)) {
                index = x;
                break;
            }
        }
        if (index != -1) {
            array.remove(index);
            System.out.println("删除学生成功");
        } else {
            System.out.println("不好意思,你要删除的学号对应的学生信息不存在，请回去重新选择你的操作");
            return;
        }
    }

    private static void addStudent(ArrayList<Student> array) {
        Scanner sc = new Scanner(System.in);
        String sid;
        while (true) {
            System.out.println("请输入学号：");
            sid = sc.nextLine();

            boolean flag = false;
            for (int x = 0; x < array.size(); x++) {
                Student s = array.get(x);
                if (s.getSid().equals(sid)) {
                    flag = true;
                }
            }

            if (flag == true) {
                System.out.println("你输入的学号已经被占用,请重新输入");
            } else {
                break;
            }
        }

        System.out.println("请输入姓名：");
        String name = sc.nextLine();
        System.out.println("请输入年龄：");
        String age = sc.nextLine();
        System.out.println("请输入地址：");
        String address = sc.nextLine();
        Student s = new Student();
        s.setSid(sid);
        s.setName(name);
        s.setAge(age);
        s.setAddress(address);
        array.add(s);
        System.out.println("添加学生成功");
    }

    private static void findAllStudent(ArrayList<Student> array) {
        if (array.size() == 0) {
            System.out.println("不好意思,目前没有学生信息可供查看,请回去重新选择你的操作");
            return;
        }
        System.out.println("学号\t\t姓名\t年龄\t居住地");
        for (int x = 0; x < array.size(); x++) {
            Student s = array.get(x);
            System.out.println(s.getSid() + "\t" + s.getName() + "\t" + s.getAge() + "\t" + s.getAddress());
        }
    }
}