成绩绩点管理系统《基于案例的软件构造教程》作业

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成绩绩点管理系统《基于案例的软件构造教程》作业

三个文件在同一级目录即可

jsd.txt 原始数据用于初始化绩点表
ScoreClass.java 成绩绩点基类
Main.java 主文件所有逻辑代码

jsd.txt

4 ,   90 ,      100, A（优）
3.7 ,       87 ,     89.9, A－3.3 ,       84 ,     86.9 ,B＋
3 ,       81 ,     83.9 ,B（良）
2.7 ,       78 ,     80.9 ,B－
2.3 ,       75 ,     77.9 ,C＋
2 ,       72 ,     74.9 ,C（中）
1.7 ,       69 ,      71.9 ,C－
1.3 ,       66 ,     68.9 ,D＋
1 ,       60 ,     65.9 ,D
0 ,        0 ,     59.9 ,F（不及格)

ScoreClass

import lombok.Data;@Data
public class ScoreClass {private String scoreNumber;private String scoreDown;private String scoreUp;private String scoreGrade;@Overridepublic String toString() {return  "  " +scoreNumber.trim() + "     \t" +scoreDown.trim() + "   \t" +scoreUp.trim() + "       " +scoreGrade.trim();}
}

Main

import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;public class Main {public static void main(String[] args) throws IOException {initStudentSystem();}/*** 初始化程序* @throws IOException*/public static void initStudentSystem() throws IOException {ArrayList<ScoreClass> scoreClasses = initScoreTable();while (true) {menu();try {Scanner scanner = new Scanner(System.in);int number = scanner.nextInt();chooseMenu(scoreClasses, number);} catch (IOException e) {System.out.println("请输入正确的指令！");}}}/*** 基础菜单*/public static void menu() {System.out.println("--- 学生成绩绩点表管理系统 ---");System.out.println("--- 1.查询当前绩点表 ---");System.out.println("--- 2.增加一条记录 ---");System.out.println("--- 3.删除一条记录 ---");System.out.println("--- 4.修改一条记录 ---");System.out.println("--- 0.退出操作 ---");}/*** 选择菜单* @param arr* @param number* @throws IOException*/public static void chooseMenu(ArrayList<ScoreClass> arr, int number) throws IOException {switch (String.valueOf(number)) {case "1":showScoreTable(arr);break;case "2":arr.add(addScore());break;case "3":showScoreTable(arr);deleteScore(arr);break;case "4":showScoreTable(arr);editScore(arr);break;case "0":System.exit(0);break;}}/*** 初始化绩点表** @return* @throws IOException*/public static ArrayList<ScoreClass> initScoreTable() throws IOException {ArrayList<ScoreClass> scoreTables = new ArrayList<>();String filePath = "src/jds.txt";FileInputStream fin = new FileInputStream(filePath);InputStreamReader reader = new InputStreamReader(fin);BufferedReader buffReader = new BufferedReader(reader);String strTmp;while ((strTmp = buffReader.readLine()) != null) {ScoreClass scoreTable = new ScoreClass();String[] arrScoreTable = strTmp.split(",");Arrays.stream(arrScoreTable).forEach(x -> x.replaceAll(" ", ""));scoreTable.setScoreNumber(arrScoreTable[0]);scoreTable.setScoreDown(arrScoreTable[1]);scoreTable.setScoreUp(arrScoreTable[2]);scoreTable.setScoreGrade(arrScoreTable[3]);scoreTables.add(scoreTable);}buffReader.close();return scoreTables;}/*** 查询当前绩点表** @param arr 绩点表*/public static void showScoreTable(ArrayList<ScoreClass> arr) {System.out.println("序号  绩点    最低成绩    最高成绩    成绩等级");for (int i = 0; i < arr.size(); i++) {System.out.print(" " + (i + 1) + "  ");System.out.println(arr.get(i));}}/*** 增加一条记录** @return*/public static ScoreClass addScore() {ScoreClass scoreTable = new ScoreClass();Scanner scanner = new Scanner(System.in);try {System.out.println("请输入绩点：");double x = scanner.nextDouble();System.out.println("请输入最低成绩：");double y = scanner.nextDouble();System.out.println("请输入最高成绩：");double z = scanner.nextDouble();System.out.println("请输成绩等级：");String w = scanner.next();scoreTable.setScoreNumber(String.valueOf(x));scoreTable.setScoreDown(String.valueOf(y));scoreTable.setScoreUp(String.valueOf(z));scoreTable.setScoreGrade(w);System.out.println("新增成功！");} catch (Exception e) {System.out.println("请输入纯数字！");}return scoreTable;}/*** 删除一条记录* @param arr*/public static void deleteScore(ArrayList<ScoreClass> arr) {System.out.println("请输入序号进行删除：");Scanner scanner = new Scanner(System.in);try {int index = scanner.nextInt();arr.remove(index - 1);System.out.println("删除成功！");} catch (Exception e) {System.out.println("请输入纯数字！");}}/*** 修改一条记录* @param arr*/public static void editScore(ArrayList<ScoreClass> arr) {System.out.println("请输入序号进行修改：");Scanner scanner = new Scanner(System.in);try {int index = scanner.nextInt();System.out.println("请输入绩点：");double x = scanner.nextDouble();System.out.println("请输入最低成绩：");double y = scanner.nextDouble();System.out.println("请输入最高成绩：");double z = scanner.nextDouble();System.out.println("请输成绩等级：");String w = scanner.next();arr.get(index - 1).setScoreNumber(String.valueOf(x));arr.get(index - 1).setScoreDown(String.valueOf(y));arr.get(index - 1).setScoreUp(String.valueOf(z));arr.get(index - 1).setScoreGrade(w);System.out.println("修改成功！");} catch (Exception e) {System.out.println("请输入纯数字！");}}}