Java-學生信息管理系統

一：項目結構（Eclipse）

功能實現：基本的增刪改查

 

二：代碼

package student;

public class Student {
    private String sno; //學號
    private String name;//姓名
    private String age;//年齡
    private String sex;//性別
    private String score;//成績
    public String getSno() {
        return sno;
    }
    public void setSno(String sno) {
        this.sno = sno;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getAge() {
        return age;
    }
    public void setAge(String age) {
        this.age = age;
    }
    public String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public String getScore() {
        return score;
    }
    public void setScore(String score) {
        this.score = score;
    }
    public Student() {
        super();
        // TODO Auto-generated constructor stub
    }
}

package student;

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

public class Main {
    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {
        zhuye();
    }

    private static void zhuye() {
        ArrayList<Student> list = new ArrayList<Student>();
        for (;;) {
            // TODO Auto-generated method stub
            System.out.println("-----歡迎進入學生管理系統-----");
            System.out.println("-----請輸入數字代號進行操作-----");
            System.out.println("1:所有學生信息");
            System.out.println("2:添加學生信息");
            System.out.println("3:刪除學生信息");
            System.out.println("4:修改學生信息");
            System.out.println("5:查詢學生信息");
            System.out.println("6:退出系統");
            int choice = sc.nextInt();
            if (choice == 1) {
                showallstudent(list);
            } else if (choice == 2) {
                addstudent(list);
            } else if (choice == 3) {
                deletestudent(list);
            } else if (choice == 4) {
                updatestudent(list);
            } else if (choice == 5) {
                selectstudent(list);
            } else if (choice == 6) {
                System.out.println("-----退出系統成功-----");
                break;
            } else {
                System.out.println("-----請輸入正確代號-----");
            }
        }
    }

    private static void updatestudent(ArrayList<Student> list) {
        // TODO Auto-generated method stub
        if (list.size() == 0) {
            System.out.println("-----當前沒有學生信息-----");
        } else {
            System.out.println("請輸入修改學生的學號:");
            String id = sc.next();
            for (int i = 0; i < list.size(); i++) {
                if (id.equals(list.get(i).getSno())) {
                    System.out.println("姓名:");
                    String name = sc.next();
                    System.out.println("年齡:");
                    String age = sc.next();
                    System.out.println("性別:");
                    String sex = sc.next();
                    System.out.println("成績:");
                    String score = sc.next();
                    Student student = new Student();
                    student.setSno(id);
                    student.setName(name);
                    student.setAge(age);
                    student.setSex(sex);
                    student.setScore(score);
                    list.set(i, student);
                    System.out.println("-----修改成功-----");
                } else {
                    System.out.println("-----沒有找到該學生，請重新輸入-----");
                    updatestudent(list);
                }
            }
        }

    }

    private static void addstudent(ArrayList<Student> list) {
        // TODO Auto-generated method stub
        System.out.println("學號:");
        String sno = sc.next();
        System.out.println("姓名:");
        String name = sc.next();
        System.out.println("年齡:");
        String age = sc.next();
        System.out.println("性別:");
        String sex = sc.next();
        System.out.println("成績:");
        String score = sc.next();
        Student student = new Student();
        student.setSno(sno);
        student.setName(name);
        student.setAge(age);
        student.setSex(sex);
        student.setScore(score);
        if (list.add(student)) {
            // System.out.println(list);
            System.out.println(name + "學生信息添加成功");
        } else {
            System.out.println(name + "學生信息添加失敗");
        }
    }

    private static void selectstudent(ArrayList<Student> list) {
        // TODO Auto-generated method stub
        if (list.size() == 0) {
            System.out.println("-----當前沒有學生信息-----");
        } else {
            System.out.println("請輸入您想查詢的學生學號：");
            String id = sc.next();
            for (int i = 0; i < list.size(); i++) {
                if (id.equals(list.get(i).getSno())) {
                    System.out.println("學號:" + list.get(i).getSno() + " 姓名:" + list.get(i).getName() + " 年齡:"
                            + list.get(i).getAge() + " 性別:" + list.get(i).getSex() + " 成績:" + list.get(i).getScore());
                } else {
                    System.out.println("沒有找到該學生，請重新輸入");
                    selectstudent(list);
                }
            }
        }

    }

    private static void deletestudent(ArrayList<Student> list) {
        // TODO Auto-generated method stub
        if (list.size() == 0) {
            System.out.println("-----當前沒有學生信息-----");
        } else {
            System.out.println("請輸入您想要刪除的學生學號：");
            String id = sc.next();
            for (int i = 0; i < list.size(); i++) {
                if (id.equals(list.get(i).getSno())) {
                    list.remove(i);
                    System.out.println("學生信息刪除成功");
                } else {
                    System.out.println("未找到您想要刪除的學生信息，請重新輸入");
                    deletestudent(list);
                }
            }
        }

    }

    private static void showallstudent(ArrayList<Student> list) {
        // TODO Auto-generated method stub
        if (list.size() == 0) {
            System.out.println("-----當前沒有學生信息-----");
        } else {
            //System.out.println(list);
            for (Student stu : list) {
                System.out.println("學號:" + stu.getSno() + " 姓名:" + stu.getName() + "年齡:" + stu.getAge() + " 性別:"
                        + stu.getSex() + " 成績:" + stu.getScore());
            }
        }
    }
}

三：運行截圖