设计模式示例-原型模式

package prototype;import java.util.Hashtable;/** *  * 专门用来生产可以克隆的对象,只要实现Product接口的都可以生产 *  * @author  Administrator * @version  [版本号, 2012-10-18] * @see  [相关类/方法] * @since  [产品/模块版本] */public class Manager{    private Hashtable showcase = new Hashtable();        /**     * 注册产品模板的方法     * @param name     * @param proto     * @see [类、类#方法、类#成员]     */    public void register(String name, Product proto)    {        showcase.put(name, proto);    }        /**     * 根据名称找到对应的产品模板,然后克隆出新产品     * @param protoname     * @return     * @see [类、类#方法、类#成员]     */    public Product create(String protoname)    {        Product p = (Product)showcase.get(protoname);        return p.createClone();    }}

package prototype;/** *  * 实现Product接口的具体产品类,可以在类的内部调用clone()方法产生一个新对象 *  * @author  Administrator * @version  [版本号, 2012-10-18] * @see  [相关类/方法] * @since  [产品/模块版本] */public class MessageBox implements Product{    private char decochar;        public MessageBox(char decochar)    {        this.decochar = decochar;    }        @Override    public Product createClone()    {        Product product = null;        try        {            product = (Product)clone();        }        catch (CloneNotSupportedException e)        {            e.printStackTrace();        }        return product;    }        @Override    public void use(String s)    {        int length = s.toCharArray().length;        for (int i = 0; i < length + 4; i++)        {            System.out.print(decochar);        }        System.out.println("");        System.out.println(decochar + " " + s + " " + decochar);        for (int i = 0; i < length + 4; i++)        {            System.out.print(decochar);        }        System.out.println("");    }    }

package prototype;/** *  * 产品接口，扩展了Cloneable接口，实现该接口的产品都可以克隆 *  * @author  Administrator * @version  [版本号, 2012-10-17] * @see  [相关类/方法] * @since  [产品/模块版本] */public interface Product extends Cloneable{    public abstract void use(String s);        public abstract Product createClone();}

package prototype;public class TestPrototype{        /** 测试原型模式的主函数     * @param args     * @see [类、类#方法、类#成员]     */    public static void main(String[] args)    {        Manager manager = new Manager();        Product p1 = new MessageBox('*');        manager.register("MessageBox", p1);        Product clone = manager.create("MessageBox");        clone.use("clone");        p1.use("origin");            }    }