java项目，实现简单的学生成绩管理系统

刺骨的言语ヽ痛彻心扉 2023-10-04 21:17 70阅读 0赞

package com.xuecheng.base.exception;
    
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.Map;
    import java.util.Scanner;
    
    public class StudentScoreManager {
        public static void main(String[] args) {
            // 定义一个map集合，用于存储学生成绩
            Map<String, ArrayList<Integer>> scoreMap = new HashMap<>();
    
            while (true) {
                System.out.println("-----欢迎来到学生成绩管理系统-----");
                System.out.println("1.录入学生成绩");
                System.out.println("2.查询学生成绩");
                System.out.println("3.退出");
                System.out.println("请选择（1-3）");
    
                Scanner sc = new Scanner(System.in);
                int choose = sc.nextInt();
    
                switch (choose) {
                    case 1:
                        inputScore(scoreMap);
                        break;
                    case 2:
                        queryScore(scoreMap);
                        break;
                    case 3:
                        System.out.println("欢迎下次使用！");
                        System.exit(0);
                }
    
            }
    
    
        }
    
        public static void inputScore(Map<String, ArrayList<Integer>> scoreMap) {
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入学生姓名：");
            String name = sc.next();
            System.out.println("请输入该学生的三门课程成绩：");
            int score1 = sc.nextInt();
            int score2 = sc.nextInt();
            int score3 = sc.nextInt();
    
            // 将三门课成绩放到list中
            ArrayList<Integer> scoreList = new ArrayList<>();
            scoreList.add(score1);
            scoreList.add(score2);
            scoreList.add(score3);
    
            // 将学生成绩放入Map中
            scoreMap.put(name, scoreList);
            System.out.println("录入成功！");
    
        }
    
        public static void queryScore(Map<String, ArrayList<Integer>> scoreMap) {
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入要查询的学生姓名：");
            String name = sc.next();
            if(scoreMap.containsKey(name)) {
                ArrayList<Integer> list = scoreMap.get(name);
                System.out.println("该学生的成绩如下：");
                System.out.println("科目1：" + list.get(0));
                System.out.println("科目2：" + list.get(1));
                System.out.println("科目3：" + list.get(2));
            } else {
                System.out.println("查无此人！");
            }
        }
    
    }