Java实现学生管理系统(控制台版本)

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

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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---------

来源：https://juejin.cn/post/7107030837878587422