Java Proxy Base Class 1.0

1. The agent's writing, is more troublesome, writes the native agent, is also a bored and is easy to omit the thing. Write a simple proxy class that can be used to refer to errors as well.

1  Packagecn;2 3 ImportJava.lang.reflect.InvocationHandler;4 ImportJava.lang.reflect.Method;5 ImportJava.lang.reflect.Proxy;6 7 /**8 * The base of the proxy class, you must first set the object (must be the interface object assignment implementation Class), otherwise the obtained proxy object will be null pointer. 9  * @authorJxlysTen  * One  */ A  Public classProxybaseImplementsInvocationhandler { -     PrivateObject obj; -  the      Publicproxybase () { -     } -  -      Publicproxybase (Object obj) { +          This. obj =obj; -     } +  A      PublicObject getobj () { at         returnobj; -     } -  -      Public voidsetobj (Object obj) { -          This. obj =obj; -     } in  -     /** to * Get proxy object +      *  -      * @paramT the      * @return *      */ $      Public<T> T GetProxy (class<t>t) {Panax Notoginseng         returngetObject (T, GetProxy ()); -     } the  +     /** A * Get proxy object the      */ +      PublicObject GetProxy () { -         returnObj! =NULL? Proxy.newproxyinstance (Obj.getclass (). getClassLoader (), Obj.getclass (). Getinterfaces (), This) :NULL; $     } $  -     //Object Strong Turn -@SuppressWarnings ("Unchecked") the      Public<T> T GetObject (class<t>T, Object obj) { -         returnObj! =NULL? (T) obj:NULL;Wuyi     } the  　　  -      Public voidbeforeaction () { Wu     } -  About      Public voidafteraction () { $     } -  -      PublicObject Invoke (Object proxy, Method method, object[] args)throwsThrowable { - beforeaction (); AObject invoke =method.invoke (obj, args); + afteraction (); the         returninvoke; -     } $}

The call is as follows:

1 InterfaceA {2      Public voidsay ();3 }4 5 classBImplementsA {6 7      Public voidsay () {8System.out.print ("Love");9     }Ten } One  A  Public classTestmain { -  -      Public Static voidMain (string[] args) { theA = new B (); -A.say ();//non-agent -Proxybase Pbu =NewProxybase (a) { -              Public voidbeforeaction () { +System.out.print ("I"); -             } +  A              Public voidafteraction () { atA = GetObject (A.class, Getobj ()); -System.out.print ("you!"); -             } -         }; -A = Pbu.getproxy (A.class); -PBU =NULL;//This step is not important, also can not.  in A.say ();//agent can also be implemented in an inherited way.  -     } to}

Java Proxy Base Class 1.0