1、JDK动态代理获取代理对象

接口 如下：

package com.ecut.mapper;

public interface ReactHouse {
public void reathouse();
}

实现类：

package com.ecut.mapper.impl;

import com.ecut.mapper.ReactHouse;

public class UserImpl implements ReactHouse{

@Override
public void reathouse() {
	System.out.println("我要买房子");
	
}

}

jdk动态代理获取类：

package com.ecut.service;

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

public class GetProxy {

private Object target;

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

public  Object getProxy() {
	
	
	
	ClassLoader loader = this.getClass().getClassLoader();
	
	Class[] interfaces = target.getClass().getInterfaces();
	
	InvocationHandler  h = new InvocationHandler () {

		@Override
		public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
			
			return null;
		}
		
	};
	Object agency = Proxy.newProxyInstance(loader, interfaces, h);
	return agency;
}

}

运行类：
package com.ecut.test;

import com.ecut.mapper.ReactHouse;
import com.ecut.mapper.impl.UserImpl;
import com.ecut.service.GetProxy;

public class Starter {
public static void main(String[] args) {

	ReactHouse target = new UserImpl();
	GetProxy getProxy = new GetProxy(target);
	ReactHouse reactHouse = (ReactHouse)getProxy.getProxy();
	reactHouse.reathouse();

// UserImpl userImpl = new UserImpl();
// CglibProxy proxy = new CglibProxy(userImpl);
// UserImpl user = (UserImpl)proxy.getProxy();
// user.reathouse();

}

}
从这获取的 reactHouse 对象为null ，问题所在我找到了但不知道如何解决
原因是获取的安全接口为null。。。System.getSecurityManager() == null

2、cglib动态代理获取代理对象

代理对象获取类：
package com.ecut.service;

import java.lang.reflect.Method;

import org.springframework.cglib.proxy.Enhancer;
import org.springframework.cglib.proxy.MethodInterceptor;
import org.springframework.cglib.proxy.MethodProxy;

public class CglibProxy {
private Object target;

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

public Object getProxy() {
	
	Enhancer enhancer = new Enhancer();
	
	enhancer.setSuperclass(target.getClass());
	
	MethodInterceptor methodInterceptor = new MethodInterceptor() {

		@Override
		public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
			System.out.println("intercept..");
			
			return null;
		}
		
	};
	enhancer.setCallback(methodInterceptor);
	Object object = enhancer.create();
	return object;
}

}

运行:

UserImpl userImpl = new UserImpl();
CglibProxy proxy = new CglibProxy(userImpl);
UserImpl user = (UserImpl)proxy.getProxy();
user.reathouse();

运行结果：
intercept..
intercept..
null

获取的user 对象依旧为null想不明白。
刚学，对着视频一步一步来的，有点自闭了。求大神解惑是哪一步出错了，该如何解决呢。