Java实现学生管理系统(控制台版本)

2024-04-02 19:04:59 1026人浏览安东尼

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摘要

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

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<Student> array = new ArrayList<Student>();
        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<Student> 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<Student> 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<Student> 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

"C:\Program Files\Java\jdk1.8.0_51\bin\java" -Didea.launcher.port=7534 "-Didea.launcher.bin.path=D:\Program Files (x86)\JetBrains\IntelliJ IDEA 2016.3.6\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_51\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_51\jre\lib\ext\sunpkcs11.jar;C:\Program 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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---------