字符流的小应用实现班级学生信息录入txt文件

把学生对象添加到集合里面去 再把集合里面的数据一行一行的放到文件里面去

学生类代码：

public class Student {

    private String id;
    private String name;
    private int age;
    private String address;

    public Student() {
    }

    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 void setId(String id) {
        this.id = id;
    }

    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 getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }


    @Override
    public String toString() {

        String data ;
        data = id+","+name+","+Integer.toString(age)+","+address;
        return data;

    }

main方法

 public static void main(String[] args) throws IOException {


        //创建学生对象
        Student s1 = new Student("001","海洋",22,"河南");
        Student s2 = new Student("002","大涛",23,"安徽");
        Student s3 = new Student("003","明明",24,"北京");
        Student s4 = new Student("004","飒飒",27,"上海");

        //创建集合
        ArrayList array = new ArrayList<>();

        array.add(s1);
        array.add(s2);
        array.add(s3);
        array.add(s4);

        //字符输出流
        FileWriter fw = new FileWriter("C:\Users\Administrator\IdeaProjects\Day07\a.txt");
        //自符缓冲流对象
        BufferedWriter bw = new BufferedWriter(fw);

        //开始写数据
        for (Student student : array){

            //写数据
            bw.write(student.toString());
            //换行
            bw.newline();
            //刷新
            bw.flush();

        }


        //释放资源
        bw.close();


    }

效果