Java实现学生管理系统(控制台版本)

目录

• 前言介绍
• 创建学生类Student 
• main方法实现CRUD
• 查询方法
• 添加方法
• 删除方法
• 修改方法
• 控制台打印

前言介绍

最近很多同学找我帮忙做一些课程设计或Web前端大作业、其中控制台项目应该是初学者必须经历的一个过程、作为java初学者这个控制台版本的学生信息管理系统十分合适、用到的技术也是最简单的JavaList集合、变量的声明、对象的创建、一些基本的while语句、switch语句、循环遍历等基础语法。一个最基础版本的控制台学生管理系统也就是CRUD功能、 直接上完整代码

创建学生类Student 

public class Student {
    private String id;
    private String name;
    private String arg;
    private String 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 getArg() {
        return arg;
    }

    public void setArg(String arg) {
        this.arg = arg;
    }

    public String getAddress() {
        return address;
    }

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

main方法实现CRUD

package com.railway.modules.base.test;

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

public class TestStudent {
    public static void main(String[] args) {
        ArrayList array = new ArrayList();
        while (true) {
            System.out.println("----------学生管理系统-----------");
            System.out.println("---------1.查询学生信息---------");
            System.out.println("---------2.添加学生信息---------");
            System.out.println("---------3.删除学生信息---------");
            System.out.println("---------4.修改学生信息---------");
            System.out.println("---------5.输入你的选择---------");
            Scanner input = new Scanner(System.in);
            int a = input.nextInt();
            switch (a) {
                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;
            }
        }
    }
    
}

查询方法

public static void findAllStudent(ArrayList array) {
        // TODO Auto-generated method stub
        if (array.size() == 0) {
            System.out.println("对不起，没有学生信息");
            System.out.println("请重新选择");
            return;
        }
        System.out.println("学号\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.getId() + "\t" + s.getName() + "\t"
                    + s.getArg() + "\t" + s.getAddress());
        }
    }
    

添加方法

public static void addStudent(ArrayList array) {
        Scanner input = new Scanner(System.in);
        String id;
        while(true){
            System.out.println("请输入你的学号");
            id = input.nextLine();
            // 判断ID是否重复；
            boolean flag = false;

            // 遍历集合信息
            for (int x = 0; x < array.size(); x++) {
                Student st = array.get(x);
                // 取得该学生id与数组中id进行对比
                if (st.getId().equals(id)) {
                    flag = true;
                    break;

                }

            }
            if (flag) {
                System.out.println("对不起，学号被占用");
            }else{
                break;
            }
        }
        System.out.println("请输入你的姓名");
        String name = input.nextLine();
        System.out.println("请输入你的年龄");
        String arg = input.nextLine();
        System.out.println("请输入你的地址");
        String address = input.nextLine();

        Student s = new Student();
        s.setId(id);
        s.setName(name);
        s.setArg(arg);
        s.setAddress(address);
        array.add(s);
        System.out.println("添加成功");

    }

删除方法

public static void deleteStudent(ArrayList array) {
        System.out.println("请输入你想删除学生的学号");
        Scanner input = new Scanner(System.in);
        String id = input.nextLine();
        int index = -1;
        for (int i = 0; i < array.size(); i++) {
            Student s = (Student) array.get(i);
            if (s.getId().equals(id)) {
                index = i;
            }
        }
    }

修改方法

public static void updateStudent(ArrayList array) {

        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("请输入你要修改的学号");
        String id = input.nextLine();
        int index = -1;
        //变量集合
        for (int i = 0; i < array.size(); i++) {
            //获取所有学生对象
            Student s = array.get(i);
            if (s.getId().equals(id)) {
                index = i;
                break;
            }
        }
        if (index == -1) {
            System.out.println("不好意思，你要修改的学生信息不存在");
        } else {
            System.out.println("请输入学生姓名");
            String name = input.nextLine();
            System.out.println("请输入学生年龄");
            String arg = input.nextLine();
            System.out.println("请输入学生地址");
            String address = input.nextLine();

            //创建学生对象
            Student s = new Student();
            s.setId(id);
            s.setId(name);
            s.setArg(arg);
            s.setAddress(address);

            //修改集合中的学生对象
            array.set(index, s);

            System.out.println("修改学生成功");
        }

    }

控制台打印

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Files (x86)\JetBrains\IntelliJ IDEA 2016.3.6\lib\idea_rt.jar" com.intellij.rt.execution.application.AppMain com.railway.modules.base.test.TestStudent
----------学生管理系统-----------
---------1.查询学生信息---------
---------2.添加学生信息---------
---------3.删除学生信息---------
---------4.修改学生信息---------
---------5.输入你的选择---------
1
对不起，没有学生信息
请重新选择
----------学生管理系统-----------
---------1.查询学生信息---------
---------2.添加学生信息---------
---------3.删除学生信息---------
---------4.修改学生信息---------
---------5.输入你的选择---------
2
请输入你的学号
1
请输入你的姓名
2
请输入你的年龄

3请输入你的地址

4添加成功
----------学生管理系统-----------
---------1.查询学生信息---------
---------2.添加学生信息---------
---------3.删除学生信息---------
---------4.修改学生信息---------
---------5.输入你的选择---------

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