Java学习--学生管理系统(残破版)

代码

Main.java

import java.util.ArrayList;import java.util.Scanner;public class Main {    public static void main(String[] args) {        ArrayList list = new ArrayList();        loop:        while (true) {            System.out.println("-----欢迎来到阿宝院校学生管理系统-----");            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.查询学生");            System.out.println("5.退出系统");            System.out.println("请输入您的选择:");            Scanner sc = new Scanner(System.in);            String choose = sc.next();            switch (choose) {                case "1" -> AddStudent(list);                case "2" -> DeleteStudent(list);                case "3" -> UpdateStudent(list);                case "4" -> LookStudent(list);                case "5" -> {                    System.out.println("退出!");                    break loop;                }                default -> System.out.println("没有这个选项!");            }        }    }    // 添加学生    public static void AddStudent(ArrayList list) {        System.out.println("添加学生!");        Student s = new Student();        Scanner sc = new Scanner(System.in);        System.out.println("请录入id:");        while (true) {            String id = sc.next();            boolean soleIds = soleId(list, id);            if (soleIds) {                System.out.println("该id已经存在!");            } else {                s.setId(id);                break;            }        }        System.out.println("请输入姓名:");        String name = sc.next();        s.setName(name);        System.out.println("请输入年龄:");        int age = sc.nextInt();        s.setAge(age);        System.out.println("请输入家庭住址:");        String address = sc.next();        s.setAddress(address);        list.add(s);    }    //删除学生的信息    public static void DeleteStudent(ArrayList list) {        System.out.println("请输入要删除的学生id:");        Scanner sc = new Scanner(System.in);        String id = sc.next();        // 查询有没有这个学生        int indexValue = getIndex(list, id);        if (indexValue >= 0) {            list.remove(indexValue);            System.out.println("删除成功!");        } else {            System.out.println("该id不存在!");        }    }    //修改学生的信息    public static void UpdateStudent(ArrayList list) {        System.out.println("请输入要修改的学生id:");        Scanner sc = new Scanner(System.in);        String id = sc.next();        // 查询有没有这个学生        Boolean values = soleId(list, id);        int indexValue = getIndex(list, id);        if (values) {            Student stu = list.get(indexValue);            System.out.println("请输入要修改的姓名:");            String name = sc.next();            stu.setName(name);            System.out.println("请输入要修改的年龄:");            int age = sc.nextInt();            stu.setAge(age);            System.out.println("请输入要修改的家庭住址:");            String address = sc.next();            stu.setAddress(address);            System.out.println("修改成功!");        } else {            System.out.println("该id不存在!");        }    }    //查询学生的信息    public static void LookStudent(ArrayList list) {        //如果没有学生        if (list.isEmpty()) {            System.out.println("当前暂无学生,请先添加后再查询!");            return;        }        System.out.println("id\t姓名\t年龄\t家庭住址");        for (int i = 0; i    
Student.java
  
public class Student {    private String id;    private String name;    private int age;    private String address;    public Student() {    }    public Student(String id, String name, int age, String address) {        this.id = id;        this.name = name;        this.age = age;        this.address = address;    }    /**     * 获取     * @return id     */    public String getId() {        return id;    }    /**     * 设置     * @param id     */    public void setId(String id) {        this.id = id;    }    /**     * 获取     * @return name     */    public String getName() {        return name;    }    /**     * 设置     * @param name     */    public void setName(String name) {        this.name = name;    }    /**     * 获取     * @return age     */    public int getAge() {        return age;    }    /**     * 设置     * @param age     */    public void setAge(int age) {        this.age = age;    }    /**     * 获取     * @return address     */    public String getAddress() {        return address;    }    /**     * 设置     * @param address     */    public void setAddress(String address) {        this.address = address;    }}
 
效果图
 
主界面
  
增加和查询
  
删除