java Proxy

package spring.aop02_Proxy;

public class TimeBook implements TimeBookInterface
{
	public void doAuditing(String name)
	{
		System.out.println(name);
	}
}

package spring.aop02_Proxy;

public interface TimeBookInterface
{
	public void doAuditing(String name);
}

package spring.aop02_Proxy;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;

public class TimeBookProxy
{
	private Logger logger = Logger.getLogger(this.getClass().getName());

	private TimeBookInterface timeBookInterface;
	
	public TimeBookProxy (TimeBookInterface timeBookInterface)
	{
		this.timeBookInterface = timeBookInterface;
	}

	public TimeBookInterface getTimeBookInterface()
	{
		return timeBookInterface;
	}

	public void setTimeBookInterface(TimeBookInterface timeBookInterface)
	{
		this.timeBookInterface = timeBookInterface;
	}

	public void doAuditing(String name)
	{
		logger.log(Level.INFO, "start auditing..");
		timeBookInterface.doAuditing(name);
		logger.log(Level.INFO, "end   auditing..");
	}
}

package spring.aop02_Proxy;

/**
 * 静态代理
 *
 * @author ZengWenFeng
 */
public class TimeBookTest
{
	public static void main(String[] args)
	{
		TimeBookProxy proxy = new TimeBookProxy(new TimeBook());
		proxy.doAuditing("ZengWenFeng");
	}
}

package spring.aop03_Proxy;

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

import org.apache.log4j.Level;
import org.apache.log4j.Logger;

public class LogProxy implements InvocationHandler
{
	private Logger logger = Logger.getLogger(this.getClass().getName());

	private Object delegate;

	// 2
	public Object bind(Object delegate)
	{
		this.delegate = delegate;

		return Proxy.newProxyInstance(delegate.getClass().getClassLoader(), delegate.getClass().getInterfaces(), this);
	}

	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
	{
		Object result = null;

		try
		{
			logger.log(Level.INFO, "start auditing..");
			
			result = method.invoke(delegate, args);
			
			logger.log(Level.INFO, "end   auditing..");
		}
		catch (Exception e)
		{
			logger.log(Level.INFO, e.toString());
		}

		return result;
	}
}

package spring.aop03_Proxy;

public class TimeBook implements TimeBookInterface
{
	public void doAuditing(String name)
	{
		System.out.println(name);
	}
}

package spring.aop03_Proxy;

public interface TimeBookInterface
{
	public void doAuditing(String name);
}

package spring.aop03_Proxy;

/**
 * 动态代理模式
 * 
 *
 * @author ZengWenFeng
 */
public class TimeBookTest
{
	public static void main(String[] args)
	{
		LogProxy proxy = new LogProxy();
		
		// 1
		TimeBookInterface tbi = (TimeBookInterface)proxy.bind(new TimeBook());
		
		tbi.doAuditing("ZengWenFeng");
	}
}

package java_proxy.jdk.demo02;

public class TargetObject
{
	public void say()
	{
		System.out.println("hello world.");
	}
}

package java_proxy.jdk.demo02;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

import java.lang.reflect.Method;

public class ZwfMethodInterceptor implements MethodInterceptor
{
	private Object target;//目标类  

	public ZwfMethodInterceptor(Object target)
	{
		this.target = target;
	}

	public Object createProxy()
	{
		Enhancer enhancer = new Enhancer();
		enhancer.setCallback(this);

		enhancer.setSuperclass(this.target.getClass());
		return enhancer.create();
	}

	public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable
	{
		System.out.println("aaaaa");//切面方法a();  
		//。。。  
		method.invoke(this.target, objects);//调用目标类的目标方法  
		//。。。  
		System.out.println("bbbbb");//切面方法f();  
		return null;
	}
}

package java_proxy.jdk.demo02;

public class ZwfMethodInterceptorTest
{
	public static void main(String[] args)
	{
		TargetObject target = new TargetObject();

		ZwfMethodInterceptor myInterceptor = new ZwfMethodInterceptor(target);

		TargetObject proxyObj = (TargetObject) myInterceptor.createProxy();
		proxyObj.say();
	}
}