How to use the Cglib agent in java

This article mainly explains "how to use the Cglib agent in java". The content in the article is simple and clear, easy to learn and understand. Please follow the editor's train of thought to study and learn "how to use the Cglib agent in java".

Description

1. Cglib agent can be called subclass agent, which builds subclass objects in memory so as to expand the function of target objects.

Both static and JDK proxies require an object to implement an interface. Sometimes the proxy object is just a single object, and the Cglib proxy can be used at this time.

2. Cglib generates the proxy class through Enhancer and implements the intercept method by implementing the MethodInterceptor interface.

You can add an enhanced method to this method, and you can use a reflective Method or MethodProxy inherited class to call the original method.

Example

Public class TVProxyCglib implements MethodInterceptor {/ / create a proxy object public Object getProxyInstance (Class c) {/ / 1 for the target object. Tool class Enhancer enhancer = new Enhancer (); / / 2. Set the parent class enhancer.setSuperclass (c); / / 3. Set the callback function enhancer.setCallback (this); / / 4. Create a subclass (proxy object) return enhancer.create ();} @ Override public Object intercept (Object o, Method method, Object [] objects, MethodProxy methodProxy) throws Throwable {System.out.println ("TVProxyFactory enhancement."); Object object = methodProxy.invokeSuper (o, objects); return object }} Thank you for your reading, the above is the content of "how to use Cglib Agent in java". After the study of this article, I believe you have a deeper understanding of how to use Cglib Agent in java, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!