Java简单学生信息管理系统

import java.io.;
import java.nio.file.;
import java.util.;
import java.util.stream.;

class Student {
    private String id;
    private String name;
    private int age;
    private String address;

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

public String getId() {
        return id;
    }

public String getName() {
        return name;
    }

public int getAge() {
        return age;
    }

public String getAddress() {
        return address;
    }
}

interface StudentService {
    void addStudent(Student student) throws IOException;
    List listStudents() throws IOException;
    Optional findStudentById(String id) throws IOException;
    void deleteStudentById(String id) throws IOException;
}

class FileStudentService implements StudentService {
    private static final String FILE_PATH = “students.txt”;

@Override
    public void addStudent(Student student) throws IOException {
        try (BufferedWriter writer = Files.newBufferedWriter(Paths.get(FILE_PATH), StandardOpenOption.CREATE, StandardOpenOption.APPEND)) {
            writer.write(student.getId() + “,” + student.getName() + “,” + student.getAge() + “,” + student.getAddress());
            writer.newLine();
        }
    }

@Override
    public List listStudents() throws IOException {
        return Files.lines(Paths.get(FILE_PATH))