Java设计模式代码，设计模式系列所有示例代码

/*Copyright (c) 2018. Haiwei Corporation. All Rights Reserved. Haiwei CONFIDENTIALITY The information in this file is confidential and privileged from Haiwei Corporation, which is intended only for use solely by Haiwei Corporation. Disclosure, copying, distribution, or use of the contents of this file by persons other than Haiwei Corporation is strictly prohibited and may violate applicable laws.*/ package com.haiwei.structure.flyweight; import java.util.HashMap; /** * 工厂类,控制Flyweight类创建对象 */ public class FlyweightFactory { /** * 享元池，用来存储共享的对象 */ private HashMap<String,Flyweight> flyweightPoolMap = new HashMap<>(); /** * 工厂类使用单例 */ private static FlyweightFactory INSTANCE = null; private FlyweightFactory(){} public static FlyweightFactory Instanct(){ if(INSTANCE == null){ INSTANCE = new FlyweightFactory(); } return INSTANCE; } /** * 获取flyweight对象 * @param key 分类标识字符串 * @param intrisicState 内部状态 * @param extrisicState 外包状态 * @return */ public Flyweight getFlyweight(String key,String intrisicState,String extrisicState){ if(!flyweightPoolMap.containsKey(key)){ flyweightPoolMap.put(key, new Flyweight(intrisicState)); } //获取flyweight对象并设置外部状态 return flyweightPoolMap.get(key).setExtrisicState(extrisicState); } /** * Flyweight对象 */ public class Flyweight { /** * 内部状态：同一个key 共享的数据 */ private String intrisicState; /** * 外部状态：同一个key，数据不同 */ private String extrisicState; /** * 私有化 构造函数,用户不可自己new * @param intrisicState */ private Flyweight(String intrisicState){ this.intrisicState = intrisicState; } /** * 设置 外部数据 * @param extrisicState * @return */ private Flyweight setExtrisicState(String extrisicState){ this.extrisicState = extrisicState; return this; } /** * 操作 */ public void operation(){ System.out.println("共享数据:"+intrisicState+" 非共享数据:"+extrisicState); } } }