用Java编写一个学生管理系统(添加、删除、修改、查询学生信息)。
时间: 2023-08-08 09:14:06 浏览: 65
以下是一个简单的学生管理系统的Java代码示例,其中包括添加、删除、修改和查询学生信息等功能:
```java
import java.util.ArrayList;
import java.util.Scanner;
public class StudentManagementSystem {
private ArrayList<Student> studentList;
public StudentManagementSystem() {
studentList = new ArrayList<Student>();
}
public void addStudent() {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入学生姓名:");
String name = scanner.nextLine();
System.out.println("请输入学生年龄:");
int age = scanner.nextInt();
System.out.println("请输入学生性别:");
String gender = scanner.next();
Student student = new Student(name, age, gender);
studentList.add(student);
System.out.println("学生信息添加成功!");
}
public void deleteStudent() {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入要删除的学生姓名:");
String name = scanner.nextLine();
for (Student student : studentList) {
if (student.getName().equals(name)) {
studentList.remove(student);
System.out.println("学生信息删除成功!");
return;
}
}
System.out.println("未找到该学生信息,请重新输入!");
}
public void updateStudent() {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入要修改的学生姓名:");
String name = scanner.nextLine();
for (Student student : studentList) {
if (student.getName().equals(name)) {
System.out.println("请输入学生年龄:");
int age = scanner.nextInt();
System.out.println("请输入学生性别:");
String gender = scanner.next();
student.setAge(age);
student.setGender(gender);
System.out.println("学生信息修改成功!");
return;
}
}
System.out.println("未找到该学生信息,请重新输入!");
}
public void queryStudent() {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入要查询的学生姓名:");
String name = scanner.nextLine();
for (Student student : studentList) {
if (student.getName().equals(name)) {
System.out.println(student);
return;
}
}
System.out.println("未找到该学生信息,请重新输入!");
}
public void printAllStudent() {
for (Student student : studentList) {
System.out.println(student);
}
}
}
```
其中,我们定义了一个`Student`类来表示学生信息,包括姓名、年龄和性别,代码如下:
```java
public class Student {
private String name;
private int age;
private String gender;
public Student(String name, int age, String gender) {
this.name = name;
this.age = age;
this.gender = gender;
}
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;
}
@Override
public String toString() {
return "姓名:" + name + ",年龄:" + age + ",性别:" + gender;
}
}
```
在主函数中,我们可以使用以下代码来测试学生管理系统的功能:
```java
public static void main(String[] args) {
StudentManagementSystem system = new StudentManagementSystem();
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println("请选择操作:1.添加学生信息 2.删除学生信息 3.修改学生信息 4.查询学生信息 5.显示所有学生信息 6.退出系统");
int choice = scanner.nextInt();
switch (choice) {
case 1:
system.addStudent();
break;
case 2:
system.deleteStudent();
break;
case 3:
system.updateStudent();
break;
case 4:
system.queryStudent();
break;
case 5:
system.printAllStudent();
break;
case 6:
System.out.println("感谢使用学生管理系统!");
System.exit(0);
default:
System.out.println("输入有误,请重新选择!");
break;
}
}
}
```
这样,我们就实现了一个简单的学生管理系统,可以方便地添加、删除、修改和查询学生信息。