Spring Proxy mode

1. Static Proxy

Subject object: Student

 Public Interface Student {    public  String Add ();}

Target object: realstudent

 Public class Realstudent implements Student {    public  String Add () {        System. out. println ("add OK");         return NULL ;    }}

Proxy object: Proxstudent

 Public classProxstudent implements Student {//Interaction between Objects    PrivateStudent realstudent;  PublicStudent getrealstudent () {returnrealstudent; }     Public voidsetrealstudent (Student realstudent) { This. realstudent =realstudent;  This. realstudent=realstudent; }     PublicString Add () {System. out. println ("The transaction is open! "); returnRealstudent.add (); }}

Single Test

// Static proxy     @Test    publicvoid  test01 () {        // Real Theme Object        Student student=New  realstudent ();         // proxy Object        Proxstudent proxstudent=New  proxstudent ();        Proxstudent.setrealstudent (student);        Proxstudent.add ();    }

2.JDK Dynamic Agent

Interface: Iuserdao

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

Class: Userdaoimpl

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

Single Test

//JDK Dynamic Agent@Test Public voidtest02 () {final Iuserdao dao=NewUserdaoimpl (); Iuserdao Proxy= (Iuserdao) proxy.newproxyinstance (Dao.getclass (). getClassLoader (), Dao.getclass (). Getinterfaces (),NewInvocationhandler () { Publicobject Invoke (Object proxy, Method method, object[] args) throws Throwable {System. out. println ("The transaction is open .");                Method.invoke (Dao,args); return NULL;        }        }); //proxy Object Add () edit ()Proxy.add ();    Proxy.edit (); }

3.CGLIB Dynamic Agent

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

Single test mode one

//CGLIB Dynamic Agent one@Test Public voidtest03 () {Final UserService service=NewUserService (); Enhancer Enhancer=Newenhancer (); //building subclasses of business classes in memoryEnhancer.setsuperclass (Service.getclass ()); Enhancer.setcallback (NewOrg.springframework.cglib.proxy.InvocationHandler () { Publicobject Invoke (Object O, Method method, object[] objects) throws Throwable {System. out. println ("The transaction is open .");                Method.invoke (service,objects); return NULL;        }        }); UserService Proxy=(UserService) enhancer.create ();    Proxy.dalete (); }

Single test mode two

//CGLIB Dynamic Agent two@Test Public voidtest04 () {Final UserService service=NewUserService (); Enhancer Enhancer=Newenhancer (); //building subclasses of business classes in memoryEnhancer.setsuperclass (Service.getclass ()); Enhancer.setcallback (NewMethodinterceptor () { PublicObject Intercept (Object o, Method, object[] objects, Methodproxy methodproxy) throws Throwable { System. out. println ("The transaction is open .");                Methodproxy.invoke (service,objects); return NULL;        }        }); UserService Proxy=(UserService) enhancer.create ();        Proxy.dalete (); }

Spring Proxy mode