1 定义一个学员类有以下 属性：姓名、性别、年龄、分数 无参、全参构造方法getset方法 2 定义main方法定义一个存储Student的集合并初始化一些数据： 1 ListStudent stuList = new ArrayList; 2 stuListaddnew Student迪丽热巴女1899; 3 stuListaddnew Student古力娜扎女1998; 4 st

学员类的代码：

public class Student { private String name; private String gender; private int age; private int score;

public Student() {}

public Student(String name, String gender, int age, int score) {
    this.name = name;
    this.gender = gender;
    this.age = age;
    this.score = score;
}

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;
}

public int getScore() {
    return score;
}

public void setScore(int score) {
    this.score = score;
}

}

main()方法中的代码：

import java.io.FileWriter; import java.io.IOException; import java.util.ArrayList; import java.util.List;

public class Main { public static void main(String[] args) { List stuList = new ArrayList<>(); stuList.add(new Student("迪丽热巴","女",18,99)); stuList.add(new Student("古力娜扎","女",19,98)); stuList.add(new Student("周杰伦","男",20,88)); stuList.add(new Student("蔡徐坤","男",19,78));

    try {
        FileWriter writer = new FileWriter("a.txt");
        for (Student student : stuList) {
            String line = student.getName() + "," + student.getGender() + "," + student.getAge() + "," + student.getScore();
            writer.write(line + "\n");
        }
        writer.close();
        System.out.println("写入成功！");
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}

程序会将学员信息写入到a.txt文件中，每个学员信息占一行，每个字段之间用,符号隔开