创建型模式之原型模式

/**
 *  Prototype Class
 *  原型类
 */
public class Cookie implements Cloneable {
   
    @Override
    public Object clone() throws CloneNotSupportedException
    {
        //In an actual implementation of this pattern you would now attach references to
        //the expensive to produce parts from the copies that are held inside the prototype.
        return (Cookie) super.clone();
    }
 }

/**
 * Concrete Prototypes to clone
 * 具体原型
 **/
public class CoconutCookie extends Cookie {
}

/**
 * Client Class
 * 客户类
 **/
public class CookieMachine {

    private Cookie cookie;//cookie必须是可复制的

    public CookieMachine(Cookie cookie) {
        this.cookie = cookie;
    }

    public Cookie makeCookie() {
        try {
            return (Cookie) cookie.clone();
        } catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        return null;
    }


    public static void main(String args[]) {
        Cookie tempCookie = null;
        Cookie prot = new CoconutCookie();
        CookieMachine cm = new CookieMachine(prot); //设置原型
        for (int i = 0; i < 100; i++)
            tempCookie = cm.makeCookie();//通过复制原型返回多个cookie
    }
}