通用设置属性反射方法

public class Demo_Reflect {
    public static void main(String[] args) throws Exception {
        Person person = new Person("张三",23);
        System.out.println(person);
        
        setProperty(person,"name","李四");
        System.out.println(person);
        
        setProperty(person,"age",24);
        System.out.println(person);
    }
    
    private static void setProperty(Object Obj, String PropertyName, Object Value) throws Exception {
        Class cls = Obj.getClass();
        Field field = cls.getDeclaredField(PropertyName);// 通过暴力反射获取字段
        field.setAccessible(true);// 去掉私有权限
        field.set(Obj, Value);
    }

}

class Person {
    private String name;
    private int age;
    
    @Override
    public String toString() {
        return "Person [name=" + name + ", age=" + age + "]";
    }
    
    public Person() {
        super();
    }
    
    public Person(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }

}