个人aop框架

个人aop框架

Advice.java

package com.cn.aop.advice;

import java.lang.reflect.Method;

public interface Advice {
 public void beginMethod(Object proxy,Method method,Object[] args);
 public void afterMethod(Object proxy,Method method,Object[] args);
 public void calculateTime(Object proxy, Method method, Object[] args);
}

Myadvice.java

package com.cn.aop.advice.impl;

import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import com.cn.aop.advice.Advice;

public class MyAdvice implements Advice {
 private long beginTime;
 private long endTime;
 @Override
 public void afterMethod(Object proxy, Method method, Object[] args) {
  // TODO Auto-generated method stub
  beginTime = System.currentTimeMillis();
  System.out.println(method.getName()+"方法在第"+beginTime+"秒开始运行");
 }

 @Override
 public void beginMethod(Object proxy, Method method, Object[] args) {
  // TODO Auto-generated method stub
  endTime = System.currentTimeMillis();
  System.out.println(method.getName()+"方法在第"+endTime+"秒运行运行结束");
 }

 @Override
 public void calculateTime(Object proxy, Method method, Object[] args) {
  // TODO Auto-generated method stub
  System.out.println(method.getName()+"方法运行了"+(endTime-beginTime)+"秒");
 }

}

Subject.java

package com.cn.aop.subject;

public interface Subject {
 public void sayBye(String name);
}

Myadvice.java

package com.cn.aop.subject.impl;

import com.cn.aop.subject.Subject;

public class RealSubject implements Subject {

 @Override
 public void sayBye(String name) {
  // TODO Auto-generated method stub
  System.out.println(name+"Good Bye");
 }
}
BeanFactory.java

package com.cn.aop.factory;

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

import com.cn.aop.advice.Advice;

public class BeanFactory {
 private Properties ppt = new Properties();
 public BeanFactory(InputStream input){
  try {
   ppt.load(input);
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
 public Object getBean(String name){
  String className = ppt.getProperty(name);
  Class clazz = null;
  Object bean = null;
  try {
   clazz = Class.forName(className);
   bean=clazz.newInstance();
   if(bean instanceof BeanProxyFactory){
    Object proxy = null;
    Advice advice = (Advice)Class.forName(ppt.getProperty(name+".advice")).newInstance();
    Object target = Class.forName(ppt.getProperty(name+".target")).newInstance();
    BeanProxyFactory proxyFactory =(BeanProxyFactory)bean;
    proxyFactory.setTarget(target);
    proxyFactory.setAdvice(advice);
    proxy = proxyFactory.getProxy();
    return proxy;
   }
   
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return bean;
 }
}

BeanProxyFactory.java

package com.cn.aop.factory;

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

import com.cn.aop.advice.Advice;

public class BeanProxyFactory {
 private Advice advice;
 private Object target;
 public Advice getAdvice() {
  return advice;
 }
 public Object getTarget() {
  return target;
 }

 public void setAdvice(Advice advice) {
  // TODO Auto-generated method stub
  this.advice = advice;
 }
 public void setTarget(Object target) {
  // TODO Auto-generated method stub
  this.target = target;
 }
 public Object getProxy() {
  // TODO Auto-generated method stub
  Object proxy =null;
  System.out.println(getTarget());
  proxy = Proxy.newProxyInstance(target.getClass().getClassLoader(), target.getClass().getInterfaces(),
    new InvocationHandler(){
   Advice advice = getAdvice();
   @Override
   public Object invoke(Object proxy, Method method, Object[] args)
     throws Throwable {
    // TODO Auto-generated method stub
    advice.beginMethod(proxy, method, args);
    Object returnValue = method.invoke(target, args);
    advice.afterMethod(proxy, method, args);
    advice.calculateTime(proxy, method, args);
    return returnValue;
   }
  });
  return proxy;
 }

}

DynamicProxyTest.java

package com.cn.aop;

import java.io.InputStream;

import com.cn.aop.factory.BeanFactory;
import com.cn.aop.subject.Subject;

public class DynamicProxyTest {
 public static void main(String[] args){
  InputStream input = DynamicProxyTest.class.getResourceAsStream("config.properties");
  //System.out.println(input);
  BeanFactory factory = new BeanFactory(input);
//  System.out.println(factory);
  Subject suject = factory.getBean("bean");
 }
}
属性文件：config.properties

bean.advice=com.cn.aop.advice.impl.MyAdvice
bean=com.cn.aop.factory.BeanProxyFactory
bean.target=com.cn.aop.subject.impl.RealSubject
#bean=com.cn.aop.subject.impl.RealSubject