反射练习

首先创建一个Student实体类:

public class Student {

	private int id;
	private String name;

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

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

}

下面是通过PropertyDescriptor类利用反射对id属性进行赋值。

import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class ReflectTest {

	public static void main(String[] args) throws IllegalAccessException,IllegalArgumentException, InvocationTargetException {
		Student s = new Student();
		try {
			PropertyDescriptor pd = new PropertyDescriptor("id", s.getClass());//获取student类中的id属性
			Method method = null;
			method = pd.getWriteMethod();//获取student类中的setId方法
			System.out.println(method);
			method.invoke(s, new Object[] { 1 });//为student类进行id赋值
			System.out.println(s.getId());
		} catch (IntrospectionException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

}

努力努力！！！！