无法使用spring 的复制功能？

Question

  @Override    public String toString() {        return "Player{" +                "name='" + name + '\'' +                ", age='" + age + '\'' +                ", email='" + email + '\'' +                ", ff=" + ff +                '}';
    }    public static void main(String[] args) throws InstantiationException, IllegalAccessException {
        Player player = new Player();
        player.age = "234";
        player.name = "asd";
        player.email = "qq";
        player.ff = 34;
        Player player2 = new Player();
        BeanUtils.copyProperties(player, player2);
        BeanUtils.copyProperties(player2, player);
        System.out.println(player2.toString());
        System.out.println(player.toString());
    }
}

Player{name='null', age='null', email='null', ff=null}
Player{name='asd', age='234', email='qq', ff=34}

Process finished with exit code 0

Answer 1

private属性全部加上getter和setter方法试试，另外第一个参数应该是目标对象。