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<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---------
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