知道屬性名稱，可以用java 反射機(jī)制動(dòng)態(tài)獲取屬性值

public class People {
    private String name;
    private Integer age;

    /* 省略getter and setter*/
}

public class JavaReflectTest {
    public static void main(String[] args) {
        People people = new People();
        people.setName("dgq");
        people.setAge(26);

        try {
            Field field = people.getClass().getDeclaredField("name");
            field.setAccessible(true);
            System.out.println(field.get(people));
        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

如果是用groovy 就特別簡(jiǎn)單了

class People {
    String name;
    Integer age;
}

class ReflecTest {

    public static void main(String[] args) {
        People people = new People()
        people.name = "dgq"
        people.age = 26

        println(people.getProperty("name"))

        String property = "age";
        println(people."$property")

    }
}