用java编写程序实现学生信息管理系统

好的，这里提供一个简单的学生信息管理系统的Java代码实现，包括添加学生、修改学生、查询学生和删除学生等功能。

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

public class StudentManagementSystem {

    static ArrayList<Student> students = new ArrayList<Student>();

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        while (true) {

            System.out.println("请选择操作：");
            System.out.println("(1)添加学生信息");
            System.out.println("(2)修改学生信息");
            System.out.println("(3)查询学生信息");
            System.out.println("(4)删除学生信息");
            System.out.println("(5)退出程序");

            int choice = input.nextInt();

            switch (choice) {
                case 1:
                    addStudent();
                    break;
                case 2:
                    updateStudent();
                    break;
                case 3:
                    searchStudent();
                    break;
                case 4:
                    deleteStudent();
                    break;
                case 5:
                    System.exit(0);
                default:
                    System.out.println("输入错误，请重新输入！");
                    break;
            }
        }
    }

    // 添加学生
    public static void addStudent() {

        Scanner input = new Scanner(System.in);

        System.out.println("请输入学生姓名：");
        String name = input.next();

        System.out.println("请输入学生学号：");
        String id = input.next();

        System.out.println("请输入学生年龄：");
        int age = input.nextInt();

        System.out.println("请输入学生性别：");
        String sex = input.next();

        Student student = new Student(name, id, age, sex);
        students.add(student);

        System.out.println("学生信息添加成功！");
    }

    // 修改学生
    public static void updateStudent() {

        Scanner input = new Scanner(System.in);

        System.out.println("请输入要修改的学生学号：");
        String id = input.next();

        Student student = findStudentById(id);

        if (student != null) {

            System.out.println("请输入学生姓名：");
            String name = input.next();

            System.out.println("请输入学生年龄：");
            int age = input.nextInt();

            System.out.println("请输入学生性别：");
            String sex = input.next();

            student.setName(name);
            student.setAge(age);
            student.setSex(sex);

            System.out.println("学生信息修改成功！");
        } else {
            System.out.println("未找到该学生信息！");
        }
    }

    // 查询学生
    public static void searchStudent() {

        Scanner input = new Scanner(System.in);

        System.out.println("请输入要查询的学生学号：");
        String id = input.next();

        Student student = findStudentById(id);

        if (student != null) {
            System.out.println(student);
        } else {
            System.out.println("未找到该学生信息！");
        }
    }

    // 删除学生
    public static void deleteStudent() {

        Scanner input = new Scanner(System.in);

        System.out.println("请输入要删除的学生学号：");
        String id = input.next();

        Student student = findStudentById(id);

        if (student != null) {
            students.remove(student);
            System.out.println("学生信息删除成功！");
        } else {
            System.out.println("未找到该学生信息！");
        }
    }

    // 根据学号查找学生
    public static Student findStudentById(String id) {

        for (Student student : students) {
            if (student.getId().equals(id)) {
                return student;
            }
        }

        return null;
    }
}

class Student {

    private String name;
    private String id;
    private int age;
    private String sex;

    public Student(String name, String id, int age, String sex) {
        this.name = name;
        this.id = id;
        this.age = age;
        this.sex = sex;
    }

    public String getName() {
        return name;
    }

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

    public String getId() {
        return id;
    }

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

    public int getAge() {
        return age;
    }

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

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    @Override
    public String toString() {
        return "学生姓名：" + name + "，学号：" + id + "，年龄：" + age + "，性别：" + sex;
    }
}

可以通过运行该程序，选择不同的操作来添加、修改、查询和删除学生信息。