将List<Class>转换为List<Class.property>

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Student> students = new ArrayList<>();
        students.add(new Student("Alice", 18));
        students.add(new Student("Bob", 20));
        students.add(new Student("Charlie", 22));

        List<String> names = convertToPropertyList(students, "name");
        System.out.println(names); // 输出：[Alice, Bob, Charlie]

        List<Integer> ages = convertToPropertyList(students, "age");
        System.out.println(ages); // 输出：[18, 20, 22]
    }

    public static <T, P> List<P> convertToPropertyList(List<T> list, String propertyName) {
        List<P> result = new ArrayList<>();
        try {
            for (T item : list) {
                Field field = item.getClass().getDeclaredField(propertyName);
                field.setAccessible(true);
                P propertyValue = (P) field.get(item);
                result.add(propertyValue);
            }
        } catch (NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }
        return result;
    }

    static class Student {
        private String name;
        private int age;

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

        public String getName() {
            return name;
        }

        public int getAge() {
            return age;
        }
    }
}