用java制作一个具有增删改查的简单的学生管理系统

1、学生成员类
 

package mystudentManage;

public class Student {
    private String name;
    private String stdId;
    private String age;
    private String place;
    public Student() {

    }
    public Student(String name, String stdId, String age, String place) {
        super();
        this.name = name;
        this.stdId = stdId;
        this.age = age;
        this.place = place;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getStdId() {
        return stdId;
    }
    public void setStdId(String stdId) {
        this.stdId = stdId;
    }
    public String getAge() {
        return age;
    }
    public void setAge(String age) {
        this.age = age;
    }
    public String getPlace() {
        return place;
    }
    public void setPlace(String place) {
        this.place = place;
    }
    
}

2、学生管理类（主类）

package mystudentManage;

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

public class StudentManage {
	public static void main(String[] args) {
		ArrayList<Student> arry = new ArrayList<>();
		while(true) {
			//这是成绩管理系统的主界面
			System.out.println("------学生管理系统------");
			System.out.println(" 1.查看所有学生");
			System.out.println(" 2.增加学生");
			System.out.println(" 3.删除学生");
			System.out.println(" 4.修改学生");
			System.out.println(" 5.退出");
			Scanner sc =new Scanner(System.in);
			System.out.println("请输入序号选择相应的功能：");
			String stufunction = sc.nextLine();
			switch (stufunction) {
			case "1":
				//查看所有学生
				findstudent(arry);
				break;
			case "2":
				//增加学生
				addstudent(arry);
				break;
			case "3":
				//删除学生
				deletestudent(arry);
				break;
			case "4":
				//修改学生
				changestudent(arry);
				break;
			case "5":
				//退出
			default:
				System.out.println("谢谢你的使用.");
				System.exit(0);//退出JVM
				break;
			}
		}
	}
	//查找类
	public static void findstudent(ArrayList<Student> arry) {
		if(arry.size()==0) {
			System.out.println("不好意思，目前还没有学生的信息可供查询，请返回重新操作！");
			return;
		}
		System.out.println("学号\t姓名\t年龄\t居住地");
		for(int i=0;i<arry.size();i++) {
			Student s = arry.get(i);
			System.out.println(s.getStdId()+"\t"+s.getName()+"\t"+s.getAge()+"\t"+s.getPlace());
		}
	}
	//添加类
	public static void addstudent(ArrayList<Student> arry) {
		//创建键盘录入对象
		Scanner sc= new Scanner(System.in);
		String stuId;
		while(true) {
			System.out.println("请输入学号：");
			stuId = sc.nextLine();
			boolean flag = false;
			for(int i=0;i<arry.size();i++) {
				Student s = arry.get(i);
				if(s.getStdId().equals(stuId)) {		
					flag = true;			
					break;
				}
			}
			if(flag) {
				System.out.println("您输入的账号被占用！！！");
			}else {
				break;
			}
		}
		System.out.println("请输入姓名：");
		String name = sc.nextLine();
		System.out.println("请输入年龄：");
		String age = sc.nextLine();
		System.out.println("请输入居住地：");
		String place = sc.nextLine();
		//创建学生对象
		Student s = new Student();
		s.setStdId(stuId);
		s.setName(name);
		s.setAge(age);
		s.setPlace(place);
		//把学生对象添加到集合
		arry.add(s);
		System.out.println("添加学生成功！");
	}
	//删除类
	public static void deletestudent(ArrayList<Student> arry) {
		Scanner sc= new Scanner(System.in);
		System.out.print("请输入要删除的学号：");
		String deleId = sc.nextLine();
		int index = -1;
		for(int i=0;i<arry.size();i++) {
			Student s = arry.get(i);
			if(s.getStdId().equals(deleId)) {		
				index=i;					
			}			
			if (index == -1) {
				System.out.println("你要删除的学生不存在，请重新选择！");
			} else {
				arry.remove(index);
				System.out.println("删除学生成功！！");
			}
		} 
	}
	//修改类
	public static void changestudent(ArrayList<Student> arry) {
		Scanner sc= new Scanner(System.in);
		System.out.print("请输入要改变的学号：");
		String changeId = sc.nextLine();
		int index = -1;
		for(int i=0;i<arry.size();i++) {
			Student s = arry.get(i);
			if(s.getStdId().equals(changeId)) {		
				index = i;				
			}
		}
		if (index == -1) {
			System.out.println("您要改变的学生不存在，请重新操作！");
		} else {
			System.out.println("请输入新姓名：");
			String name = sc.nextLine();
			System.out.println("请输入新年龄：");
			String age = sc.nextLine();
			System.out.println("请输入新居住地：");
			String place = sc.nextLine();
			//创建学生对象
			Student s = new Student();
			s.setStdId(changeId);
			s.setName(name);
			s.setAge(age);
			s.setPlace(place);
			//修改学生对象
			arry.set(index,s);
			System.out.println("修改学生成功！！！");
		}
	}
}

3、效果图

添加：

更改：

删除：