用JAVA编写一个程序实现简单的学生成绩管理，每个学生包括5门课程的成绩，从键盘输入学生信息。学生信息包括学号、姓名、五门课程成绩（语文、数学、外语、物理、化学），计算出每个学生的平均成绩，按照学生平均成绩排序（从高到低排序），输出显示。并输出每门课程所有学生的成绩单。

好的，以下是一个简单的Java程序实现学生成绩管理系统，包括学生信息输入、计算平均成绩、按平均成绩排序输出、每门课程成绩单输出等功能。

import java.util.Arrays;
import java.util.Scanner;

public class StudentScoreManagement {
    // 定义每个学生的成绩信息
    static class Student {
        String id; // 学号
        String name; // 姓名
        double[] scores; // 五门课程成绩

        public Student(String id, String name, double[] scores) {
            this.id = id;
            this.name = name;
            this.scores = scores;
        }

        // 计算平均成绩
        public double getAverageScore() {
            double sum = 0;
            for (double score : scores) {
                sum += score;
            }
            return sum / scores.length;
        }
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("请输入学生数量：");
        int n = scanner.nextInt();

        Student[] students = new Student[n];
        for (int i = 0; i < n; i++) {
            System.out.printf("请输入第%d个学生的信息：\n", i + 1);
            System.out.print("学号：");
            String id = scanner.next();
            System.out.print("姓名：");
            String name = scanner.next();
            double[] scores = new double[5];
            System.out.print("语文成绩：");
            scores[0] = scanner.nextDouble();
            System.out.print("数学成绩：");
            scores[1] = scanner.nextDouble();
            System.out.print("外语成绩：");
            scores[2] = scanner.nextDouble();
            System.out.print("物理成绩：");
            scores[3] = scanner.nextDouble();
            System.out.print("化学成绩：");
            scores[4] = scanner.nextDouble();
            students[i] = new Student(id, name, scores);
        }

        // 按平均成绩排序
        Arrays.sort(students, (s1, s2) -> Double.compare(s2.getAverageScore(), s1.getAverageScore()));

        // 输出学生信息
        System.out.println("按平均成绩排序后的学生列表：");
        for (Student student : students) {
            System.out.printf("学号：%s，姓名：%s，平均成绩：%.2f\n", student.id, student.name, student.getAverageScore());
        }

        // 输出每门课程成绩单
        System.out.println("每门课程成绩单：");
        System.out.println("语文成绩单");
        for (Student student : students) {
            System.out.printf("%s\t%.2f\n", student.name, student.scores[0]);
        }
        System.out.println("数学成绩单");
        for (Student student : students) {
            System.out.printf("%s\t%.2f\n", student.name, student.scores[1]);
        }
        System.out.println("外语成绩单");
        for (Student student : students) {
            System.out.printf("%s\t%.2f\n", student.name, student.scores[2]);
        }
        System.out.println("物理成绩单");
        for (Student student : students) {
            System.out.printf("%s\t%.2f\n", student.name, student.scores[3]);
        }
        System.out.println("化学成绩单");
        for (Student student : students) {
            System.out.printf("%s\t%.2f\n", student.name, student.scores[4]);
        }
    }
}

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