用java代码写一个学生管理系统

好的，以下是示例Java代码：

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

public class StudentManagementSystem {

public static void main(String[] args) {
Scanner input = new Scanner(System.in);
ArrayList<Student> students = new ArrayList<Student>();

while (true) {
System.out.println("=== 学生管理系统 ===");
System.out.println("1. 添加学生信息");
System.out.println("2. 查询学生信息");
System.out.println("3. 修改学生信息");
System.out.println("4. 删除学生信息");
System.out.println("5. 显示所有学生信息");
System.out.println("0. 退出程序");

System.out.print("请输入您的选项：");
int choice = input.nextInt();

switch (choice) {
case 0:
System.out.println("程序已退出！");
System.exit(0);
break;
case 1:
System.out.print("请输入学生姓名：");
String name = input.next();
System.out.print("请输入学生学号：");
String id = input.next();
Student student = new Student(name, id);
students.add(student);
System.out.println("学生信息添加成功！");
break;
case 2:
System.out.print("请输入学生学号：");
String searchId = input.next();
for (Student s : students) {
if (s.getId().equals(searchId)) {
System.out.println(s);
break;
} else {
System.out.println("未找到该学生！");
break;
}
}
break;
case 3:
System.out.print("请输入要修改学生的学号：");
String modifyId = input.next();
for (Student s : students) {
if (s.getId().equals(modifyId)) {
System.out.print("请输入修改后的学生姓名：");
String modifyName = input.next();
s.setName(modifyName);
System.out.println("学生信息修改成功！");
break;
} else {
System.out.println("未找到该学生！");
break;
}
}
break;
case 4:
System.out.print("请输入要删除学生的学号：");
String deleteId = input.next();
for (Student s : students) {
if (s.getId().equals(deleteId)) {
students.remove(s);
System.out.println("学生信息删除成功！");
break;
} else {
System.out.println("未找到该学生！");
break;
}
}
break;
case 5:
System.out.println("所有学生信息如下：");
for (Student s : students) {
System.out.println(s);
}
break;
default:
System.out.println("输入选项有误，请重新输入！");
break;
}
}

}

}

class Student {

private String name;
private String id;

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

public String getName() {
return name;
}

public String getId() {
return id;
}

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

public String toString() {
return "姓名：" + name + "，学号：" + id;
}

}