package com.alex.ssh.tool;
import java.lang.reflect.Field; 
import java.lang.reflect.Method; 
 
/**
 * 用Java反射机制来调用private方法
 * @author WalkingDog
 *
 */ 
 
public class Reflect { 
     
    public static void main(String[] args) throws Exception { 
         
        //直接创建对象  
        Person person = new Person(); 
         
        Class<?> personType = person.getClass(); 
         
        //访问私有方法  
        //getDeclaredMethod可以获取到所有方法，而getMethod只能获取public  
        Method method = personType.getDeclaredMethod("say", String.class); 
         
        //压制Java对访问修饰符的检查  
        method.setAccessible(true); 
         
        //调用方法;person为所在对象  
        method.invoke(person, "Hello World !"); 
         
        //访问私有属性  
        Field field = personType.getDeclaredField("name"); 
         
        field.setAccessible(true); 
         
        //为属性设置值;person为所在对象  
        field.set(person, "WalkingDog"); 
         
        System.out.println("The Value Of The Field is : " + person.getName()); 
         
    } 
} 
 
//JavaBean  
class Person{ 
    private String name; 
     
    //每个JavaBean都应该实现无参构造方法  
    public Person() {} 
     
    public String getName() { 
        return name; 
    } 
 
    private void say(String message){ 
        System.out.println("You want to say : " + message); 
    } 
}