Java设计模式之代理模式原理及实现代码分享

//1.抽象主题接口public interface Manager {  void doSomething();}//2.真实主题类public class Admin implements Manager {  public void doSomething() {    System.out.println("Admin do something.");  }}//3.以聚合方式实现的代理主题public class AdminPoly implements Manager{  private Admin admin;    public AdminPoly(Admin admin) {    super();    this.admin = admin;  }   public void doSomething() {    System.out.println("Log:admin操作开始");    admin.doSomething();    System.out.println("Log:admin操作结束");  }}//4.测试代码    Admin admin = new Admin();    Manager m = new AdminPoly(admin);    m.doSomething();//方式二：继承式静态代理//与上面的方式仅代理类和测试代码不同//1.代理类public class AdminProxy extends Admin {  @Override  public void doSomething() {    System.out.println("Log:admin操作开始");    super.doSomething();    System.out.println("Log:admin操作开始");  }}//2.测试代码    AdminProxy proxy = new AdminProxy();    proxy.doSomething();