使用java代码编写一个学生管理系统 一个
时间: 2024-02-10 22:42:34 浏览: 29
很棒的问题!一个学生管理系统可以包括学生信息的录入、查询、修改、删除等功能。以下是一个示例的Java代码:
```java
import java.util.ArrayList;
import java.util.Scanner;
public class StudentManagementSystem {
private ArrayList<Student> students;
public StudentManagementSystem() {
students = new ArrayList<>();
}
public void start() {
Scanner input = new Scanner(System.in);
while (true) {
System.out.println("请选择您要进行的操作:");
System.out.println("1.添加学生");
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");
System.out.println("5.退出");
System.out.println("请输入操作编号:");
int choice = input.nextInt();
switch (choice) {
case 1:
addStudent();
break;
case 2:
findStudent();
break;
case 3:
editStudent();
break;
case 4:
deleteStudent();
break;
case 5:
System.out.println("退出系统,谢谢使用!");
return;
default:
System.out.println("输入错误,请重新输入!");
break;
}
}
}
private void addStudent() {
Scanner input = new Scanner(System.in);
System.out.println("请输入学号:");
String id = input.nextLine();
System.out.println("请输入姓名:");
String name = input.nextLine();
System.out.println("请输入性别:");
String gender = input.nextLine();
System.out.println("请输入年龄:");
int age = input.nextInt();
students.add(new Student(id, name, gender, age));
System.out.println("添加成功!");
}
private void findStudent() {
Scanner input = new Scanner(System.in);
System.out.println("请选择查询方式:");
System.out.println("1.按学号查询");
System.out.println("2.按姓名查询");
int choice = input.nextInt();
switch (choice) {
case 1:
System.out.println("请输入学号:");
String id = input.nextLine();
for (Student student : students) {
if (student.getId().equals(id)) {
System.out.println(student);
return;
}
}
System.out.println("该学号不存在!");
break;
case 2:
System.out.println("请输入姓名:");
String name = input.nextLine();
for (Student student : students) {
if (student.getName().equals(name)) {
System.out.println(student);
return;
}
}
System.out.println("该姓名不存在!");
break;
default:
System.out.println("输入错误!");
break;
}
}
private void editStudent() {
Scanner input = new Scanner(System.in);
System.out.println("请输入要修改的学生的学号:");
String id = input.nextLine();
for (Student student : students) {
if (student.getId().equals(id)) {
System.out.println("请输入新的姓名(不修改请按回车):");
String name = input.nextLine();
if (!name.isEmpty()) {
student.setName(name);
}
System.out.println("请输入新的性别(不修改请按回车):");
String gender = input.nextLine();
if (!gender.isEmpty()) {
student.setGender(gender);
}
System.out.println("请输入新的年龄(不修改请按0):");
int age = input.nextInt();
if (age > 0) {
student.setAge(age);
}
System.out.println("修改成功!");
return;
}
}
System.out.println("该学号不存在!");
}
private void deleteStudent() {
Scanner input = new Scanner(System.in);
System.out.println("请输入要删除的学生的学号:");
String id = input.nextLine();
for (int i = 0; i < students.size(); i++) {
if (students.get(i).getId().equals(id)) {
students.remove(i);
System.out.println("删除成功!");
return;
}
}
System.out.println("该学号不存在!");
}
public static void main(String[] args) {
StudentManagementSystem system = new StudentManagementSystem();
system.start();
}
}
class Student {
private String id;
private String name;
private String gender;
private int age;
public Student(String id, String name, String gender, int age) {
this.id = id;
this.name = name;
this.gender = gender;
this.age = age;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "学号:" + id + " 姓名:" + name + " 性别:" + gender + " 年龄:" + age;
}
}
```