reflecttest.java

来自「各种数据保存：字符型」· Java 代码 · 共 40 行

package cn.itcast.jdbc;

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

public class ReflectTest {

	/**
	 * @param args
	 * @throws Exception
	 * @throws NoSuchMethodException
	 */
	public static void main(String[] args) throws NoSuchMethodException,
			Exception {
		TestBean oa = new TestBean("test");
		refl(oa, "showMessage");

	}

	static void refl(Object obj, String methodName)
			throws IllegalArgumentException, IllegalAccessException,
			InvocationTargetException, InstantiationException, Exception,
			NoSuchMethodException {
		Class clazz = obj.getClass();
		Method[] ms = clazz.getDeclaredMethods();
		for (int i = 0; i < ms.length; i++) {
			System.out.println(ms[i].getName());
			if (ms[i].getName().equals(methodName)) {
				ms[i].invoke(obj, null);
			}
		}

		Constructor con = clazz.getConstructor(new Class[] { String.class,
				int.class });
		Object instance = con.newInstance(new Object[] { "Hello, World", 30 });
		System.out.println(instance);
	}
}