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This article mainly explains the "Java agent pattern example analysis", the article explains the content is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "Java agent pattern example analysis" bar!

Define

Proxy pattern (Proxy Parttern) provides a stand-in for an object to control access to the object, that is, to access the target object through the proxy object, which has the advantage of extending additional functions on the basis of the implementation of the target object.

Case requirement

Apple sells phones through Apple agents.

Solution: static proxy mode

Define an abstract interface class, which plays the role of an abstract function in the agent pattern, in this case, the sale of the mobile phone is abstracted as an interface

/ * the interface for selling mobile phones (proxy mode-abstract roles) * @ author:liyajie * @ createTime:2022/2/22 14:42 * @ version:1.0 * / public interface IPhone {/ * selling mobile phones * @ author:liyajie * @ date: 2022-2-22 14:44 * @ param * @ return void * @ exception: * @ update: * @ updatePerson: * / void sellPhone () }

Defines the iPhone company class, which plays a target role in the agent mode, implements the IPhone interface, and rewrites the method of selling the phone.

/ * Apple (proxy mode-target role) * @ author:liyajie * @ createTime:2022/2/22 14:46 * @ version:1.0 * / public class TargetPhone implements IPhone {@ Override public void sellPhone () {System.out.println ("Apple is selling phones");}}

Define the proxy class, then call the method of selling the phone of the target class through the proxy class, and add your own extension function.

/ * * Agent (agency mode-agent role) * @ author:liyajie * @ createTime:2022/2/22 14:50 * @ version:1.0 * / public class ProxyPhone implements IPhone {private IPhone iPhone; public ProxyPhone (IPhone iPhone) {this.iPhone = iPhone;} @ Override public void sellPhone () {System.out.println ("agents are running ads in a loop to earn advertisers' advertising fees") System.out.println ("agents are recommending their own electronic peripherals to earn fees"); iPhone.sellPhone (); System.out.println ("agents are selling iPhones to earn a price difference");}}

The secret of making money for agents is in the red box below, selling iPhones to make money, selling other things to make money, and advertising fees to make money

Define test classes

/ * author:liyajie * @ createTime:2022/2/22 14:55 * @ version:1.0 * / public class Test {public static void main (String [] args) {TargetPhone targetPhone = new TargetPhone (); ProxyPhone proxyPhone = new ProxyPhone (targetPhone); proxyPhone.sellPhone ();}}

View the result

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