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来源：互联网发布：指纹校准软件编辑：程序博客网时间：2024/06/05 20:15

内容

让每个窗口各负责一个业务，同时委任了一位访问者，负责在客户进门时，询问他要办理的业务，告诉他应该去哪个窗口办理。这样，每个窗口的业务员就只负责一项业务，减少了在不同业务之间切换的时间耗费，当某项业务的处理流程发生变更时，不需要同时麻烦三个窗口的业务员，而只需要让处理这项业务的业务员进行修改就可以了。

代码

public interface Service {    public void accept(Visitor visitor);}

public class Saving implements Service {    public void accept(Visitor visitor) {        ((Visitor) visitor).process(this);    }}

public class Fund implements Service {    public void accept(Visitor visitor) {        visitor.process(this);    }}

public class Draw implements Service{    public void accept(Visitor visitor) {        visitor.process(this);    }}

public class Visitor {    public void process(Service service) {        System.out.println("基本业务");    }    public void process(Saving service) {        // TODO Auto-generated method stub        System.out.println("存款 ");    }    public void process(Draw service) {        // TODO Auto-generated method stub        System.out.println("提款");    }    public void process(Fund service) {        // TODO Auto-generated method stub        System.out.println("基金");    }}

public class Test {    public static void main(String[] args) {        // TODO Auto-generated method stub        Service s1 = (Service) new Saving();        Service s2 = (Service) new Draw();        Service s3 = (Service) new Fund();        Visitor visitor = new Visitor();        ((Service) s1).accept(visitor);        s2.accept(visitor);        s3.accept(visitor);    }}

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