spring aop面向切面编程

package pidan.proxy;

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


/**
 * proxyTest:动态代理类
 * proxy：针对接口的
 * 媒婆：代理类
 * 女方：目标类
 * */
public class ProxyTest implements InvocationHandler {
	//目标类
	private Object obj;
	
	//获取代理类
	public Object getProxy(Object _obj){
		this.obj=_obj;
		//System.out.println(obj);
		
		//生成一个代理类
		//this.getClass().getClassLoader() ：代理类的构造器
		//obj.getClass().getInterfaces()   ：目标类的接口
		return Proxy.newProxyInstance(this.getClass().getClassLoader(), obj.getClass().getInterfaces(), this);
	}

	@Override
	public Object invoke(Object arg0, Method arg1, Object[] arg2)
			throws Throwable {

		Object result=null;
		System.out.println("---开始打开连接---");
		result=arg1.invoke(obj, arg2);
		System.out.println("---关闭连接---");
		return result;
	}
	
	
	
}

package pidan.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import pidan.dao.IUserService;
import pidan.dao.UserService;

public class SpringAopTest {
	public static void main(String[] args) throws Exception {
		ApplicationContext context=new ClassPathXmlApplicationContext("spring_application.xml");
		
		IUserService service=context.getBean(IUserService.class);
		
		service.add();
		service.delete();
	}
}

package pidan.aop;

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;

public class Before implements MethodBeforeAdvice{

	@Override
	public void before(Method arg0, Object[] arg1, Object arg2)
			throws Throwable {
		System.out.println("我是前置增强AOP-before");
	}

}

package pidan.aop;

import java.lang.reflect.Method;

import org.springframework.aop.AfterReturningAdvice;

public class AfterReturning implements AfterReturningAdvice{

	@Override
	public void afterReturning(Object arg0, Method arg1, Object[] arg2,
			Object arg3) throws Throwable {
		System.out.println("我是后置增强aop-afterreturning");
	}

}