java反射

一些零碎知识的小计：

java反射，一共两个类，完成一个简单的反射实现：

比较简单，注释什么就不写了

入口类：TestReflect.java

 

  

package com.javasd.reflect;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;

public class TestReflect {
	
	
	public static Maker initByReflect() throws Exception{
		
		ClassLoader loader = Thread.currentThread().getContextClassLoader();
		
		Class<?> clazz = loader.loadClass("com.javasd.reflect.Maker");
		
		Constructor<?> c = clazz.getDeclaredConstructor(String.class);
		
		Maker maker = (Maker)c.newInstance(new String("zhangluping"));
		
		Method setName = clazz.getMethod("setName", String.class);
		
		Method setProduct = clazz.getMethod("setProduct", String.class);
		
		
		setName.invoke(maker, "zhangluping");
		setProduct.invoke(maker, "xingminna");
		
		
		return maker;
		
	}
	
	
	
	
	public static void main(String args[]) throws Exception{
		Maker maker = initByReflect();
		
		System.out.println(maker.say());
		
		
		
	}
	
	
}

 

 

 

 

Maker.java

 

 

package com.javasd.reflect;

public class Maker {

	
	public  Maker(){
		
	}
	
	
	public  Maker(String name){
		this.name=name;
	}
	
	private String name;
	
	private String product;

	public String getName() {
		return name;
	}

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

	public String getProduct() {
		return product;
	}

	public void setProduct(String product) {
		this.product = product;
	}
	
	
	public String say(){
		return new String(name + " makes " + product);
	}
}