java案例学生管理系统
时间: 2023-07-09 17:18:56 浏览: 49
学生管理系统是一个基础的Java项目,以下是一个简单的案例:
1. 首先,需要设计学生类,包括学生的姓名、学号、年龄、性别等基本信息。
```java
public class Student {
private String name;
private int id;
private int age;
private String gender;
public Student(String name, int id, int age, String gender) {
this.name = name;
this.id = id;
this.age = age;
this.gender = gender;
}
// getter and setter methods
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
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 "Student{" +
"name='" + name + '\'' +
", id=" + id +
", age=" + age +
", gender='" + gender + '\'' +
'}';
}
}
```
2. 接下来,需要设计一个学生管理类,用于实现对学生的增加、删除、查询和修改等操作。
```java
import java.util.ArrayList;
import java.util.List;
public class StudentManager {
private List<Student> students;
public StudentManager() {
students = new ArrayList<>();
}
// 添加学生
public void addStudent(Student student) {
students.add(student);
}
// 删除学生
public void deleteStudent(Student student) {
students.remove(student);
}
// 根据学号查询学生
public Student getStudentById(int id) {
for (Student student : students) {
if (student.getId() == id) {
return student;
}
}
return null;
}
// 修改学生信息
public void updateStudent(Student student) {
Student s = getStudentById(student.getId());
if (s != null) {
s.setName(student.getName());
s.setAge(student.getAge());
s.setGender(student.getGender());
}
}
// 获取所有学生
public List<Student> getAllStudents() {
return students;
}
}
```
3. 最后,可以编写一个测试类,用于测试学生管理系统的功能。
```java
public class TestStudentManager {
public static void main(String[] args) {
StudentManager manager = new StudentManager();
// 添加学生
manager.addStudent(new Student("张三", 1001, 18, "男"));
manager.addStudent(new Student("李四", 1002, 19, "女"));
manager.addStudent(new Student("王五", 1003, 20, "男"));
// 查询学生
Student s = manager.getStudentById(1001);
System.out.println(s);
// 修改学生信息
s.setAge(20);
manager.updateStudent(s);
System.out.println(s);
// 删除学生
manager.deleteStudent(s);
// 获取所有学生
List<Student> students = manager.getAllStudents();
System.out.println(students);
}
}
```
以上就是一个简单的学生管理系统的Java实现。当然,实际应用中还需要考虑更多的功能和异常处理等问题。