1. public abstract class WebSite {
    3. //    使用方法需要传递用户对象，外部状态
    4.     public abstract void Use(User user);
    5. }
    6. // 需要共享
    7. public class ConcreteWebSite extends WebSite {
    9.     private String name="";
    11.     public ConcreteWebSite(String name){
    13.         this.name=name;
    14.     }
    16.     @Override
    17.     public void Use(User user) {
    18.         System.out.println("网站分类："+this.name+"用户："+user.getName());
    19.     }
    21. }
    22. public class User {
    24.     private String name;
    26.     public User(String name) {
    27.         this.name = name;
    28.     }
    30.     public String getName() {
    31.         return name;
    32.     }
    34. }
    35. // WebSite享元工厂
    36. public class WebSiteFactory {
    38.     private HashMap<String, WebSite> flyweights=new HashMap<>();
    40.     public WebSite GetWebSiteCategory(String key){
    41.         if(!flyweights.containsKey(key)){
    42.             flyweights.put(key, new ConcreteWebSite(key));
    43.         }
    44.         return ((WebSite)flyweights.get(key));
    45.     }
    47.     public int GetWebSiteCount(){
    48.         return flyweights.size();
    49.     }
    51. }
    52. public class Test {
    54.     public static void main(String[] args) {
    56.         WebSiteFactory factory = new WebSiteFactory();
    58.         WebSite fx = factory.GetWebSiteCategory("产品展示");
    59.         fx.Use(new User("小菜"));
    61.         WebSite fy = factory.GetWebSiteCategory("产品展示");
    62.         fy.Use(new User("大鸟"));
    64.         WebSite fz = factory.GetWebSiteCategory("产品展示");
    65.         fz.Use(new User("李四"));
    67.         WebSite fa = factory.GetWebSiteCategory("博客");
    68.         fa.Use(new User("王五"));
    70.         WebSite fb = factory.GetWebSiteCategory("博客");
    71.         fb.Use(new User("张三"));
    73.         WebSite fc = factory.GetWebSiteCategory("博客");
    74.         fc.Use(new User("小飞"));
    76.     }
    77. }