// JDK方式：PersonService為接口，PersonServiceBean為實(shí)現(xiàn)類， 
 
 public class JDKProxyFactory implements InvocationHandler { 
  private Object targetObject; 
   
  public Object createProxyIntance(Object targetObject) 
  { 
  this.targetObject=targetObject; 
  return Proxy.newProxyInstance(this.targetObject.getClass().getClassLoader(),  
   this.targetObject.getClass().getInterfaces(), this); 
  } 
 
public Object invoke(Object proxy, Method method, Object[] args) 
 throws Throwable { 
  PersonServiceBean person=(PersonServiceBean)this.targetObject; 
  Object result=null; 
   if(person.getUser()!=null) 
   {  
   result = method.invoke(targetObject, args); 
   } 
  return result; 
} 
} 

//使用CGlib包實(shí)現(xiàn)：PersonServiceBean為實(shí)現(xiàn)類，  而沒(méi)有PersonService接口，      
 
public class CGlibProxyFactory implements MethodInterceptor{ 
 private Object targetObject; 
  
 public Object createProxyInstance(Object targetObject) 
 {  
  this.targetObject=targetObject; 
  Enhancer enhancer=new Enhancer(); 
  enhancer.setSuperclass(this.targetObject.getClass());//設(shè)置目標(biāo)類的子類，該子類會(huì)覆蓋所有父類中的非final方法 
  enhancer.setCallback(this);//設(shè)置回調(diào) 
 return enhancer.create(); 
 } 
 
public Object intercept(Object proxy, Method method, Object[] args, 
 MethodProxy methodProxy) throws Throwable { 
 PersonServiceBean person=(PersonServiceBean)this.targetObject; 
  Object result=null; 
   if(person.getUser()!=null) 
   {  
   result = methodProxy.invoke(targetObject, args); 
   } 
 return null; 
} 
}