反射練習

首先創建一個Student實體類:

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;
	}

}

下面是通過PropertyDescriptor類利用反射對id屬性進行賦值。

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());//獲取student類中的id屬性
			Method method = null;
			method = pd.getWriteMethod();//獲取student類中的setId方法
			System.out.println(method);
			method.invoke(s, new Object[] { 1 });//爲student類進行id賦值
			System.out.println(s.getId());
		} catch (IntrospectionException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

}

努力努力！！！！