Simple example of dynamic proxy for interface JavaSE8 Base Proxy

Source: Internet
Author: User
Tags stub

Li Wu:
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Os:windows7 x64
Ide:eclipse Oxygen Release (4.7.0)

Interface class:

Package blog.jizuiku6;/** * * *  @author Jizuiku * @version V17.10.03 */public interface Userdao {void play (); void Sleep ();}

Interface Implementation class:

Package blog.jizuiku6;/** * * *  @author Jizuiku * @version V17.10.03 */public class Userdaoimpl implements Userdao {@Overridepublic void Play () {//TODO auto-generated method StubSystem.out.println ("Play");} @Overridepublic void Sleep () {//TODO auto-generated method StubSystem.out.println ("Sleep");}}

The key classes appear:

Package Blog.jizuiku6;import Java.lang.reflect.invocationhandler;import java.lang.reflect.method;/** * * *  @author Jizuiku * @version V17.10.03 */public class Myinvocationhandler implements Invocationhandler {private Object Targe t = null;//Cancel parameterless construction Private Myinvocationhandler () {//TODO auto-generated constructor stub}public Myinvocationhandler (obje CT target) { = target;} @Overridepublic object Invoke (Object proxy, Method method, object[] args) throws Throwable {//TODO auto-generated Method stub//Prepare part SYSTEM.OUT.PRINTLN ("Reading document");//This line of code is equivalent//result = Target.method (AGRS); Object result = Method.invoke (target, args);//Closing part System.out.println ("Archiving"); return result;}}

Test class:

Package Blog.jizuiku6;import java.lang.reflect.proxy;/** * * *  @author Jizuiku * @version V17.10.03 */public Class Demo {public static void main (string[] args) {Userdao ud = new Userdaoimpl (); Myinvocationhandler handler = new Myinvocationhandler (UD); ClassLoader loader = Ud.getclass (). getClassLoader (); Class[] interfaces = Ud.getclass (). getinterfaces ();//The method in the interface Userdao proxy = (Userdao) proxy.newproxyinstance (loader, interfaces, handler); Execution of all methods, there will be an additional action before execution, there will be additional action after execution//sometimes use the agent is: Before executing the permission check, after executing the log record//And this program, just for a simple demonstration. Do not have practical value//If you want to use in the work, there is a mature framework can be used. But original aim, pierced will return to the Pope! ();p roxy.sleep ();p roxy.hashcode ();}}


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Simple example of dynamic proxy for interface JavaSE8 Base Proxy

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