JAVA学生成绩管理系统-Toy模板网

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只写了最基本的增删改查，其中可能会有一些没考虑到的地方。结尾有完整代码

首先是main方法

    public static void main(String[] args) throws Exception {
        //创建Scanner对象和ArrayList集合
        Scanner sc = new Scanner(System.in);
        ArrayList<Student> students = new ArrayList<>();
        //放入死循环能一直运行
        while (true) {
            Welcome();
            Menu(sc, students);
        }
    }

然后是菜单和欢迎页面

   //欢迎界面
    private static void Welcome() {
        System.out.println("请选择您要进行的操作：");
        System.out.println("1.录入学生信息");
        System.out.println("2.删除学生信息");
        System.out.println("3.修改学生信息");
        System.out.println("4.查询学生信息");
        System.out.println("5.展示所有学生成绩信息");
        System.out.println("0.退出系统");
    }

    //真正的菜单
    private static void Menu(Scanner sc, ArrayList<Student> students) {
        switch (sc.next()) {
            case "1" -> add(sc, students);                //添加学生信息
            case "2" -> deleteMessage(sc, students);      //删除学生信息
            case "3" -> change(sc, students);            //修改学生信息
            case "4" -> Search(sc, students);             //查询学生信息
            case "5" -> show(students);                   //列出所有学生的成绩
            case "0" -> System.exit(0);
        }
    }

1：添加学生信息

private static void add(Scanner sc, ArrayList<Student> students) {

        Student s = new Student();
        StudentMessage(sc, s);
        students.add(s);
    }

2：删除学生信息

 //"2"->删除学生信息
    private static void deleteMessage(Scanner sc, ArrayList<Student> students) {
        if (judge(students)) {
            System.out.println("请输入要删除学生的姓名");
            String next = sc.next();
            for (int i = 0; i < students.size(); i++) {
                Student student = students.get(i);
                if (student.getName().equals(next)) {
                    System.out.println("学号\t\t姓名\t\t性别\t\t年龄\t\t语文\t\t数学\t\t英语");
                    showMessage(student);
                    System.out.println("确定要删除吗？Y/N");
                    if (sc.next().equalsIgnoreCase("Y")) {
                        students.remove(i);
                        System.out.println("删除成功！");
                    } else {
                        System.out.println("删除失败！退回菜单页");
                    }
                    return;
                }
            }
            System.out.println("没有找到该学生！");
        } else {
            System.out.println("操作失败！");
        }
    }

3：修改学生信息

//"3"->修改学生信息
    private static void change(Scanner sc, ArrayList<Student> students) {
        if (judge(students)) {
            System.out.println("请输入要修改信息的学生姓名");
            String n = sc.next();
            for (Student student : students) {
                if (student.getName().equals(n)) {
                    StudentMessage(sc, student);
                    return;
                }
            }
        } else {
            System.out.println("操作失败");
        }
    }

4：查询单个学生信息

 //  "4"->查询单个学生信息
    private static void Search(Scanner sc, ArrayList<Student> students) {
        if (judge(students)) {
            System.out.println("请输入要查询的学生姓名");
            String next = sc.next();
            for (Student student : students) {
                if (student.getName().equals(next)) {
                    System.out.println("学号\t\t姓名\t\t性别\t\t年龄\t\t语文\t\t数学\t\t英语");
                    showMessage(student);
                    return;
                }
            }
            System.out.println("没有找到该学生的信息！");
        } else {
            System.out.println("操作失败！");
        }
    }

5：列出所有学生信息

//  "5"->列出所有学生
    private static void show(ArrayList<Student> students) {
        if (judge(students)) {
            System.out.println("学号\t\t姓名\t\t性别\t\t年龄\t\t语文\t\t数学\t\t英语");
            for (Student student : students) {
                showMessage(student);
            }
        } else {
            System.out.println("操作失败！");
        }
    }

用到的其他方法：

 private static void StudentMessage(Scanner sc, Student s) {
        System.out.println("请输入学生的学号：");
        s.setId(sc.next());
        System.out.println("请输入学生的姓名：");
        s.setName(sc.next());
        System.out.println("请输入学生的年龄：");
        s.setAge(sc.nextInt());
        while (true) {
            System.out.println("请输入学生的性别：");
            String next = sc.next();
            if (next.equals("女") || next.equals("男")) {
                s.setGender(next);
                break;
            } else {
                System.out.println("性别只有男女，没有你说的这个，请重新输入");
            }
        }

        while (true) {
            System.out.println("请输入学生的语文成绩：");
            double v = scanScore(sc);
            if (v != -1) {
                s.setChinese_score(v);
                break;
            }
        }
        while (true) {
            System.out.println("请输入学生的数学成绩：");
            double v = scanScore(sc);
            if (v != -1) {
                s.setMath_score(v);
                break;
            }
        }
        while (true) {
            System.out.println("请输入学生的英语成绩：");
            double v = scanScore(sc);
            if (v != -1) {
                s.setEnglish_score(v);
                break;
            }
        }
    }

    //根据Student对象展示单个学生的信息
    private static void showMessage(Student student) {
        System.out.println(student.getId() + "\t\t" + student.getName() + "\t\t" + student.getGender() +
                "\t\t" + student.getAge() + "\t\t" + student.getChinese_score() + "\t\t" + student.getMath_score() +
                "\t\t" + student.getEnglish_score());
    }

    //判断系统中是否有学生信息
    private static boolean judge(ArrayList<Student> students) {
        if (students.size() == 0) {
            System.out.println("还没有学生信息呢，请添加后再进行后续操作");
            return false;
        }
        return true;
    }


    private static double scanScore(Scanner sc) {
        double v = sc.nextDouble();
        if (v > 100 || v < 0) {
            System.out.println("输入成绩不在允许范围内，请重新输入");
            return -1;
        }
        return v;
    }

完整发一下代码：

学生类：



public class Student {
    private String id;
    private String name;
    private int age;
    private String gender;
    private double Math_score;
    private double Chinese_score;
    private double English_score;

    public Student() {
    }

    public Student(String id, String name, int age, String gender, double math_score, double chinese_score, double english_score) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.gender = gender;
        Math_score = math_score;
        Chinese_score = chinese_score;
        English_score = english_score;
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public double getMath_score() {
        return Math_score;
    }

    public void setMath_score(double math_score) {
        Math_score = math_score;
    }

    public double getChinese_score() {
        return Chinese_score;
    }

    public void setChinese_score(double chinese_score) {
        Chinese_score = chinese_score;
    }

    public double getEnglish_score() {
        return English_score;
    }

    public void setEnglish_score(double english_score) {
        English_score = english_score;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }
}

StudentSystem类：



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

//学生信息管理系统
//功能：增、删、改、查
public class StudentSystem {

    public static void main(String[] args) throws Exception {
        //创建Scanner对象和ArrayList集合
        Scanner sc = new Scanner(System.in);
        ArrayList<Student> students = new ArrayList<>();
        //放入死循环能一直运行
        while (true) {
            Welcome();
            Menu(sc, students);
        }
    }

    //欢迎界面
    private static void Welcome() {
        System.out.println("请选择您要进行的操作：");
        System.out.println("1.录入学生信息");
        System.out.println("2.删除学生信息");
        System.out.println("3.修改学生信息");
        System.out.println("4.查询学生信息");
        System.out.println("5.展示所有学生成绩信息");
        System.out.println("0.退出系统");
    }

    //真正的菜单
    private static void Menu(Scanner sc, ArrayList<Student> students) {
        switch (sc.next()) {
            case "1" -> add(sc, students);                //添加学生信息
            case "2" -> deleteMessage(sc, students);      //删除学生信息
            case "3" -> change(sc, students);            //修改学生信息
            case "4" -> Search(sc, students);             //查询学生信息
            case "5" -> show(students);                   //列出所有学生的成绩
            case "0" -> System.exit(0);
        }
    }

    //  "1"->添加学生信息
    private static void add(Scanner sc, ArrayList<Student> students) {

        Student s = new Student();
        StudentMessage(sc, s);
        students.add(s);
    }

    //"2"->删除学生信息
    private static void deleteMessage(Scanner sc, ArrayList<Student> students) {
        if (judge(students)) {
            System.out.println("请输入要删除学生的姓名");
            String next = sc.next();
            for (int i = 0; i < students.size(); i++) {
                Student student = students.get(i);
                if (student.getName().equals(next)) {
                    System.out.println("学号\t\t姓名\t\t性别\t\t年龄\t\t语文\t\t数学\t\t英语");
                    showMessage(student);
                    System.out.println("确定要删除吗？Y/N");
                    if (sc.next().equalsIgnoreCase("Y")) {
                        students.remove(i);
                        System.out.println("删除成功！");
                    } else {
                        System.out.println("删除失败！退回菜单页");
                    }
                    return;
                }
            }
            System.out.println("没有找到该学生！");
        } else {
            System.out.println("操作失败！");
        }
    }

    //"3"->修改学生信息
    private static void change(Scanner sc, ArrayList<Student> students) {
        if (judge(students)) {
            System.out.println("请输入要修改信息的学生姓名");
            String n = sc.next();
            for (Student student : students) {
                if (student.getName().equals(n)) {
                    StudentMessage(sc, student);
                    return;
                }
            }
        } else {
            System.out.println("操作失败");
        }
    }


    //  "4"->查询单个学生信息
    private static void Search(Scanner sc, ArrayList<Student> students) {
        if (judge(students)) {
            System.out.println("请输入要查询的学生姓名");
            String next = sc.next();
            for (Student student : students) {
                if (student.getName().equals(next)) {
                    System.out.println("学号\t\t姓名\t\t性别\t\t年龄\t\t语文\t\t数学\t\t英语");
                    showMessage(student);
                    return;
                }
            }
            System.out.println("没有找到该学生的信息！");
        } else {
            System.out.println("操作失败！");
        }
    }

    //  "5"->列出所有学生
    private static void show(ArrayList<Student> students) {
        if (judge(students)) {
            System.out.println("学号\t\t姓名\t\t性别\t\t年龄\t\t语文\t\t数学\t\t英语");
            for (Student student : students) {
                showMessage(student);
            }
        } else {
            System.out.println("操作失败！");
        }
    }

    private static void StudentMessage(Scanner sc, Student s) {
        System.out.println("请输入学生的学号：");
        s.setId(sc.next());
        System.out.println("请输入学生的姓名：");
        s.setName(sc.next());
        System.out.println("请输入学生的年龄：");
        s.setAge(sc.nextInt());
        while (true) {
            System.out.println("请输入学生的性别：");
            String next = sc.next();
            if (next.equals("女") || next.equals("男")) {
                s.setGender(next);
                break;
            } else {
                System.out.println("性别只有男女，没有你说的这个，请重新输入");
            }
        }

        while (true) {
            System.out.println("请输入学生的语文成绩：");
            double v = scanScore(sc);
            if (v != -1) {
                s.setChinese_score(v);
                break;
            }
        }
        while (true) {
            System.out.println("请输入学生的数学成绩：");
            double v = scanScore(sc);
            if (v != -1) {
                s.setMath_score(v);
                break;
            }
        }
        while (true) {
            System.out.println("请输入学生的英语成绩：");
            double v = scanScore(sc);
            if (v != -1) {
                s.setEnglish_score(v);
                break;
            }
        }
    }

    //根据Student对象展示单个学生的信息
    private static void showMessage(Student student) {
        System.out.println(student.getId() + "\t\t" + student.getName() + "\t\t" + student.getGender() +
                "\t\t" + student.getAge() + "\t\t" + student.getChinese_score() + "\t\t" + student.getMath_score() +
                "\t\t" + student.getEnglish_score());
    }

    //判断系统中是否有学生信息
    private static boolean judge(ArrayList<Student> students) {
        if (students.size() == 0) {
            System.out.println("还没有学生信息呢，请添加后再进行后续操作");
            return false;
        }
        return true;
    }


    private static double scanScore(Scanner sc) {
        double v = sc.nextDouble();
        if (v > 100 || v < 0) {
            System.out.println("输入成绩不在允许范围内，请重新输入");
            return -1;
        }
        return v;
    }


}

这就是所有内容了，这篇文章可用于学校作业(*^_^*)，但主要学习思路，我的代码也不是最简单的，其中有很多地方还可以简化，这只是我学习Java的练手作品，请酌情观看。

占位置的文字，用于消除改进质量的提醒文章来源地址https://www.toymoban.com/news/detail-531450.html

占位置的文字，用于消除改进质量的提醒