Java通過反射修改屬性值，屬性是引用對象

package com.example.demo.model;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;

public class Dog {
    private Name dogName;

    public Name getName() {
        return dogName;
    }

    public void setName(Name name) {
        this.dogName = name;
    }

    @Override
    public String toString() {
        return "Dog{" +
                "dogName=" + dogName +
                '}';
    }

    public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException, NoSuchMethodException, InvocationTargetException {
　　　　　//設置復雜對象
        Dog dog = new Dog();
        Name name = new Name();
        name.setMiddleName("WW");
        dog.setName(name);
　　　　　//獲取到dog的屬性dogName
        Field dogName = dog.getClass().getDeclaredField("dogName");
　　　　　//設置權限為可修改
        dogName.setAccessible(true);
　　　　　//獲取dogName對象
        Object dogNameObj = dogName.get(dog);
　　　　　//獲取doName的屬性middleName
        Field middleName = dogNameObj.getClass().getDeclaredField("middleName");
　　　　　//設置權限為可修改
        middleName.setAccessible(true);
　　　　　//修改middleName的值
        middleName.set(dogNameObj,"kk");
        System.out.println(dog);
    }
}

package com.example.demo.model;

public class Name {
    private String middleName;

    public String getMiddleName() {
        return middleName;
    }

    public void setMiddleName(String middleName) {
        this.middleName = middleName;
    }

    @Override
    public String toString() {
        return "Name{" +
                "middleName='" + middleName + '\'' +
                '}';
    }
}