学生管理系统——ArrayList集合

此学生管理系统利用了集合ArrayList实现了对学生的增删改查；利用数组中的方法实现分数排序；运用String类的equals实现登录功能的字符串比较。

管理员类：

package data;

public class Manger {
    private String Manname;
    private String Manpassword;

    public Manger(String Manname, String Manpassword) {
        this.Manname = Manname;
        this.Manpassword = Manpassword;
    }

    public String getManname() {
        return Manname;
    }

    public void setManname(String manname) {
        Manname = manname;
    }

    public String getManpassword() {
        return Manpassword;
    }

    public void setManpassword(String manpassword) {
        Manpassword = manpassword;
    }

    @Override
    public String toString() {
        return "Manger [Manname=" + Manname + ", Manpassword=" + Manpassword
                + "]";
    }

}

学生类：

package data;

public class Student {
    private String name;
    private String stuno;
    private String classno;
    private double point;
    int age;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getStuno() {
        return stuno;
    }
    public void setStuno(String stuno) {
        this.stuno = stuno;
    }
    public String getClassno() {
        return classno;
    }
    public void setClassno(String classno) {
        this.classno = classno;
    }
    public double getPoint() {
        return point;
    }
    public void setPoint(double point) {
        this.point = point;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    @Override
    public String toString() {
        return "Student [name=" + name + ", stuno=" + stuno + ", classno="
                + classno + ", point=" + point + ", age=" + age + "]";
    }

}

方法类：

package Way;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;
import data.Student;
import data.Manger;

public class Stuway {
    ArrayList<Student> array = new ArrayList<Student>();

    // ******************************登录************************
    public void mainMenu() {
        System.out.println();
        System.out.println("============欢迎登录学生管理系统============");
        System.out.println("1:学生信息表 ");
        System.out.println("2:增加学生信息");
        System.out.println("3:删除学生信息");
        System.out.println("4:修改学生信息");
        System.out.println("5:分数排序");
        System.out.println("6:退出");
        System.out.println("请您输入要操作的功能序号:");
    }

    // ***************************功能选择*********************
    public int chooseFunction() {
        Scanner sc = new Scanner(System.in);
        return sc.nextInt();
    }

    // ****************************信息初始化*************************
    public void init(ArrayList<Student> array) {
        Student s1 = new Student();
        s1.setName("张彬彬");
        s1.setStuno("20171509");
        s1.setClassno("计科191");
        s1.setPoint(345.0);
        s1.setAge(23);
        array.add(s1);

        Student s2 = new Student();
        s2.setName("刘冰冰");
        s2.setStuno("20181234");
        s2.setClassno("通信181");
        s2.setPoint(567);
        s2.setAge(20);
        array.add(s2);

        Student s3 = new Student();
        s3.setName("张明敏");
        s3.setStuno("20181904");
        s3.setClassno("计科191");
        s3.setPoint(432);
        s3.setAge(13);
        array.add(s3);
    }

    // ***************************学生信息显示**************************
    public void showStudents(ArrayList<Student> array) {
        for (int i = 0; i < array.size(); i++) {
            Student s = array.get(i);
            System.out.println(s);// 运行的是类中的toString
        }
    }

    // **************************增加学生信息**************************
    public void addStudents(ArrayList<Student> array) {
        System.out.println("请输入要添加的学生的信息");
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入学生的姓名：");
        String name = sc.nextLine();
        System.out.println("请输入学生的学号");
        String stuno = sc.next();
        System.out.println("请输入学生的班级");
        String classno = sc.next();
        System.out.println("请输入学生的分数");
        double point = sc.nextDouble();
        System.out.println("请输入学生的年龄");
        int age = sc.nextInt();
        Student s = new Student();
        s.setName(name);
        s.setStuno(stuno);
        s.setClassno(classno);
        s.setPoint(point);
        s.setAge(age);
        array.add(s);
        System.out.println("添加学生信息成功");
    }

    // ****************************删除学生信息***********************
    public void delectStudents(ArrayList<Student> array) {
        System.out.println("选择的是删除功能");
        System.out.println("请输入学生的学号");
        Scanner sc = new Scanner(System.in);
        String stuno = sc.next();
        for (int i = 0; i < array.size(); i++) {// 遍历集合
            Student s = array.get(i);
            if (s.getStuno().equals(stuno)) {
                array.remove(i); // 集合的方法remove实现
                System.out.println("删除成功");
                return;
            }
        }
        System.out.println("你输入的编号不存在");
    }

    // ****************************修改学生信息************************
    public void updataStudents(ArrayList<Student> array) {
        System.out.println("选择的是修改功能");
        System.out.println("请输入学生的的学号");
        Scanner sc = new Scanner(System.in);
        String stuno = sc.next();
        for (int i = 0; i < array.size(); i++) {
            Student s = array.get(i);
            if (s.getStuno().equals(stuno)) {
                System.out.println("输入新的学生姓名");
                s.setStuno(sc.next());
                System.out.println("输入新的学生学号");
                s.setName(sc.next());
                System.out.println("输入新的学生班级");
                s.setClassno(sc.nextLine());
                System.out.println("输入新的学生分数");
                s.setPoint(sc.nextDouble());
                System.out.println("输入新的学生年龄");
                s.setAge(sc.nextInt());
                System.out.println("学生信息修改成功");
                return;
            }
        }
    }

    // *****************************分数排序***********************
    public void scoreSort(ArrayList<Student> array) {
        double[] score = new double[10];
        System.out.println("选择的是排序功能");
        for (int i = 0; i < array.size(); i++) {
            Student s = array.get(i);
            score[i] = s.getPoint();
            Arrays.sort(score);

        }
        for (int j = 0; j < score.length; j++) {
            for (int i = 0; i < array.size(); i++) {
                if (score[j] == array.get(i).getPoint()){
                    System.out.println(array.get(i));
                }

            }
        }
    }

    // ***************************用户登录************************
    public boolean Log() {
        while (true) {
            Manger Man = new Manger("manger", "123");
            System.out.println("***********欢迎进入学生管理系统**********");
            System.out.println("请输入用户名");// manger
            Scanner sc = new Scanner(System.in);
            String manger = sc.nextLine();
            System.out.println("请输入密码");
            String password = sc.next();

            if ((Man.getManname().equals(manger))
                    && (Man.getManpassword().equals(password))) {
                System.out.println("登陆成功");
                return true;
            } else {
                System.out.println("登陆失败");
                return false;

            }
        }

    }

}

测试类：

package main;

import java.util.ArrayList;
import Way.Stuway;
import data.Student;

public class Test {
    public static void main(String[] args) {
    ArrayList<Student> array = new ArrayList<Student>();
    Stuway way = new Stuway();
    way.init(array);
    boolean a=way.Log();
    while(a){
        way.mainMenu();
        int choose = way.chooseFunction();

        switch (choose) {
        case 1:
            way.showStudents(array);
        break;
        case 2:
            way.addStudents(array);
            break;
        case 3:
            way.delectStudents(array);
            break;
        case 4:
            way.updataStudents(array);
            break;
        case 5:
            way.scoreSort(array);
            break;
        default:
            System.out.println("输入有误");
            break;
        }

}

}

}

运行结果：

原文地址：https://www.cnblogs.com/zhai1997/p/11393356.html