java實現類似spring的可配置AOP框架

Advice接口

import java.lang.reflect.Method;

public interface Advice
{
 
	public void beforProxy(Method method);
	public void afterProxy(Method method);
}

Myadvice

import java.lang.reflect.Method;


public class MyAdvice implements Advice
{

	 long beginTime = 0;
	 long endTime = 0;
	@Override
	public void beforProxy(Method method)
	{
		beginTime = System.currentTimeMillis();

	}

	@Override
	public void afterProxy(Method method)
	{
		endTime = System.currentTimeMillis();
		System.out.println(endTime - beginTime);

	}

}

ProxyFactory

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class ProxyFactory
{
	private Object target;
	private Advice advice;
	public Object getTarget()
	{
		return target;
	}
	public void setTarget(Object target)
	{
		this.target = target;
	}
	public Advice getAdvice()
	{
		return advice;
	}
	public void setAdvice(Advice advice)
	{
		this.advice = advice;
	}
	public Object getProxy()
	{
		Object proxys = Proxy.newProxyInstance(target.getClass().getClassLoader(), 
				target.getClass().getInterfaces(), 
				new InvocationHandler()
				{
					
					@Override
					public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
					{
						advice.beforProxy(method);
						Object reval = method.invoke(target, args);
						advice.afterProxy(method);
						return reval;
					}
				});
		return proxys;
	}
}

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class BeanFactoryTest
{
	Properties properties = new Properties();
	public BeanFactoryTest(InputStream inStream)
	{
		try
		{
			properties.load(inStream);
		} catch (IOException e)
		{
			// TODO 自動生成的 catch 塊
			e.printStackTrace();
		}
	}
	public Object getBean(String name)
	{
		String className = properties.getProperty(name);
		Object bean = null;
		try
		{
			Class clazz = Class.forName(className);
			bean = clazz.newInstance();
			if(bean instanceof ProxyFactory)
			{
				ProxyFactory proxyFactoryBean = (ProxyFactory) bean;
				Advice advice = (Advice) Class.forName(properties.getProperty(name + ".advice")).newInstance();
				Object target = (Object) Class.forName(properties.getProperty(name + ".target")).newInstance(); 
				proxyFactoryBean.setAdvice(advice);
				proxyFactoryBean.setTarget(target);
				Object proxy = proxyFactoryBean.getProxy();
				return proxy;
			}
			
		} catch (Exception e)
		{
			// TODO 自動生成的 catch 塊
			e.printStackTrace();
		}
		return bean;
	}

}

BeanFactoryTest

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

public class BeanFactoryTest
{
	Properties properties = new Properties();
	public BeanFactoryTest(InputStream inStream)
	{
		try
		{
			properties.load(inStream);
		} catch (IOException e)
		{
			// TODO 自動生成的 catch 塊
			e.printStackTrace();
		}
	}
	public Object getBean(String name)
	{
		String className = properties.getProperty(name);
		Object bean = null;
		try
		{
			Class clazz = Class.forName(className);
			bean = clazz.newInstance();
			if(bean instanceof ProxyFactory)
			{
				ProxyFactory proxyFactoryBean = (ProxyFactory) bean;
				Advice advice = (Advice) Class.forName(properties.getProperty(name + ".advice")).newInstance();
				Object target = (Object) Class.forName(properties.getProperty(name + ".target")).newInstance(); 
				proxyFactoryBean.setAdvice(advice);
				proxyFactoryBean.setTarget(target);
				Object proxy = proxyFactoryBean.getProxy();
				return proxy;
			}
			
		} catch (Exception e)
		{
			// TODO 自動生成的 catch 塊
			e.printStackTrace();
		}
		return bean;
	}

}

Test

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

public class test
{

	public static void main(String[] args) throws FileNotFoundException
	{
		InputStream inputStream = new FileInputStream("src\\ReflectTest.properties");
		BeanFactoryTest beanFactoryTest = new BeanFactoryTest(inputStream);
		Object bean = beanFactoryTest.getBean("xxx");
		System.out.println(bean.getClass().getName());
		

	}

}

ReflectTest.properties配置文件

xxx = java.util.ArrayList
#xxx = ProxyBeanFactory.ProxyFactory
xxx.advice = ProxyBeanFactory.MyAdvice
xxx.target = java.util.ArrayList