java的内省（introspector）

package com.wzh.test.introspector;

import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;

import org.junit.Test;

//使用内省API操作Bean的属性
public class Demo1 {

	@Test
	public void test() throws Exception{
//		BeanInfo info=Introspector.getBeanInfo(Person.class);
//		BeanInfo info=Introspector.getBeanInfo(Class.forName("com.wzh.test.introspector.Person"));
		BeanInfo info=Introspector.getBeanInfo(Person.class,Object.class);
		PropertyDescriptor[] pds=info.getPropertyDescriptors();
		for(PropertyDescriptor pd : pds){
			System.out.println(pd.getName());
		}
	}

	@Test
	public void test2() throws Exception{
		Person p=new Person();
		PropertyDescriptor pd=new PropertyDescriptor("age", Person.class);
		Method m=pd.getWriteMethod();
		m.invoke(p,45);

		System.out.println("getAge:"+p.getAge());
	}

	//获取当前操作的属性的类型
	@Test
	public void test3() throws IntrospectionException{
		Person p=new Person();
		PropertyDescriptor pd=new PropertyDescriptor("age", Person.class);
		System.out.println(pd.getPropertyType());
	}
}