Spring Proxy mode

1. Static Proxy

Abstract topic: Subject

 Public Interface Subject {    public  String Add ();}

Target object: Resubject

 Public class Resubject implements Subject {    public  String Add () {        System. out. println ("ok! " );         return "" ;    }}

Proxy object: Psubject

 Public classPsubject implements Subject {PrivateSubject Resubject;  PublicSubject Getresubject () {returnResubject; }     Public voidSetresubject (Subject resubject) { This. Resubject =Resubject; }     PublicString Add () {System. out. println ("Open it! "); returnResubject.add (); }}

One side

// Static proxy     @Test    publicvoid  test12 () {        Subject Subject=new Resubject ();        Psubject psubject=new  psubject ();        Psubject.setresubject (subject);        Psubject.add ();    }

2. Dynamic Agent

Interface

 Public Interface Iuserdao {    public  String Add ();      Public String edit ();}

Class

 Public classUserdaoimpl implements iuserdao{ PublicString Add () {System. out. println ("Add"); return "Add"; }     PublicString edit () {System. out. println ("Edit"); return "Edit"; }}

One side

//Dynamic Agent@Test Public voidtest13 () {final Iuserdao dao=NewUserdaoimpl (); Iuserdao pp= (Iuserdao) proxy.newproxyinstance (Dao.getclass (). getClassLoader (), Dao.getclass (). Getinterfaces (),NewInvocationhandler () { Publicobject Invoke (Object proxy, Method method, object[] args) throws Throwable {System. out. println ("Open");               Method.invoke (Dao,args); return NULL;       }       });       Pp.add ();    Pp.edit (); }

3.cglib Dynamic Agent

 Public class UserService {    publicvoid  Delete () {        System. out. println ("OK");}    }

One side (two ways)

 /*cglib Dynamic Agent*/@Test Public voidtest14 () {Final UserService servive=NewUserService (); Enhancer Enhancer=Newenhancer ();        Enhancer.setsuperclass (Servive.getclass ()); Enhancer.setcallback (NewMethodinterceptor () { PublicObject Intercept (Object o, Method, object[] objects, Methodproxy methodproxy) throws Throwable { System. out. println ("Open");                Methodproxy.invoke (servive,objects); return NULL;       }        }); /*Enhancer.setcallback (New Org.springframework.cglib.proxy.InvocationHandler () {public object Invoke (object                O, method, object[] objects) throws Throwable {System.out.println ("open");                Method.invoke (servive,objects);            return null; }        });*/userservice AA=(UserService) enhancer.create ();    Aa.delete (); }

Spring Proxy mode