标签：rgs cglib str intercept set handle vat tom new
spring中提供了两种动态代理的方式，分别是Java Proxy以及cglib
JavaProxy只能代理接口，而cglib是通过继承的方式，实现对类的代理
添加一个接口以及对应的实现类
public interface HelloInterface { void sayHello(); }
public class HelloInterfaceImpl implements HelloInterface { @Override public void sayHello() { System.out.println("hello"); } }
JavaProxy通过实现InvocationHandler实现代理
public class CustomInvocationHandler implements InvocationHandler { private HelloInterface helloInterface; public CustomInvocationHandler(HelloInterface helloInterface) { this.helloInterface = helloInterface; } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { System.out.println("before hello for proxy"); Object result = method.invoke(helloInterface, args); System.out.println("after hello for proxy"); return result; } }
而cglib实现MethodInterceptor进行方法上的代理
public class CustomMethodInterceptor implements MethodInterceptor { @Override public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable { System.out.println("before hello for cglib"); Object result = methodProxy.invokeSuper(o, objects); System.out.println("after hello for cglib"); return result; } }
分别实现调用代码
public static void main(String[] args) { Enhancer enhancer = new Enhancer(); enhancer.setSuperclass(HelloInterfaceImpl.class); enhancer.setCallback(new CustomMethodInterceptor()); HelloInterface target = (HelloInterface) enhancer.create(); target.sayHello(); CustomInvocationHandler invocationHandler = new CustomInvocationHandler(new HelloInterfaceImpl()); HelloInterface target2 = (HelloInterface) Proxy.newProxyInstance(Demo.class.getClassLoader(), new Class[]{HelloInterface.class}, invocationHandler); target2.sayHello(); }
可以看到对于的代理信息输出
before hello for cglib hello after hello for cglib before hello for proxy hello after hello for proxy
标签：rgs cglib str intercept set handle vat tom new
原文地址：https://www.cnblogs.com/yytxdy/p/13167719.html
