键盘录入学生成绩写入文件中

题目

键盘录入学生信息按照总分排序并写入文本文件

分析

录入学生信息，因为需要排序，因此将学生对象存储在 TreeSet 集合中来进行排序；
最后使用高效字符流来打印写入文件中

程序代码

学生类
package com.company.test;


public class Student {
    private String name;
    private int chineseScore;
    private int mathScore;
    private int englishScore;
    private int totalScore;

    public Student() {

    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getChineseScore() {
        return chineseScore;
    }

    public void setChineseScore(int chineseScore) {
        this.chineseScore = chineseScore;
    }

    public int getMathScore() {
        return mathScore;
    }

    public void setMathScore(int mathScore) {
        this.mathScore = mathScore;
    }

    public int getEnglishScore() {
        return englishScore;
    }

    public void setEnglishScore(int englishScore) {
        this.englishScore = englishScore;
    }

    public int getTotalScore() {
        return chineseScore+mathScore+englishScore;
    }

    public void setTotalScore(int totalScore) {
        this.totalScore = totalScore;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", chineseScore=" + chineseScore +
                ", mathScore=" + mathScore +
                ", englishScore=" + englishScore +
                ", totalScore=" + totalScore +
                '}';
    }
}

测试类
package com.company.test;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Comparator;
import java.util.Scanner;
import java.util.TreeSet;

public class Test {
    public static void main(String[] args) throws IOException {
        //需要排序，使用 TreeSet集合
        TreeSet<Student> set = new TreeSet<>(new Comparator<Student>() {
            @Override
            public int compare(Student s1, Student s2) {
                //比较总分
                int num = s2.getTotalScore() - s1.getTotalScore();
                //总分相同，比较名字
                int num2 = (num == 0) ? s2.getName().compareTo(s1.getName()) : num;
                return num2;
            }
        });
        Scanner sc = new Scanner(System.in);
        //使用循环来录入学生成绩
        for (int i = 1; i < 5; i++) {
            System.out.println("开始录入第" + i + "个学生信息------");
            System.out.println("请您输入第" + i + "个学生的姓名: ");
            String name = sc.nextLine();
            System.out.println("请您输入第" + i + "个学生的语文成绩: ");
            String chineseScore = sc.nextLine();
            System.out.println("请您输入第" + i + "个学生的数学成绩: ");
            String mathScore = sc.nextLine();
            System.out.println("请您输入第" + i + "个学生的英语成绩: ");
            String englishScore = sc.nextLine();
            //创建学生对象
            Student stu = new Student();
            stu.setName(name);
            stu.setChineseScore(Integer.parseInt(chineseScore));
            stu.setMathScore(Integer.parseInt(mathScore));
            stu.setEnglishScore(Integer.parseInt(englishScore));
            //添加学生对象
            set.add(stu);
        }
        BufferedWriter bw = new BufferedWriter(new FileWriter("Student.config"));
        bw.write("姓名    语文成绩    数学成绩    英语成绩");
        bw.newLine();
        bw.flush();
        for (Student s : set) {
            bw.write(s.getName()+"      "+s.getChineseScore()+"           "+s.getMathScore()+"        "+s.getEnglishScore());
            bw.newLine();
            bw.flush();
        }
        bw.close();
    }
}

运行结果

这个是文件上的内容