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Commit ceff7c0

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anxppanxpp
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状态模式
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‎src/com/anxpp/designpattern/state/ISaveData.java‎

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package com.anxpp.designpattern.state;
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//抽象状态
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public interface ISaveData {
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void save(Object data);
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}
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‎src/com/anxpp/designpattern/state/SaveBigData.java‎

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package com.anxpp.designpattern.state;
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//具体状态
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public enum SaveBigData implements ISaveData{
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instance;
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@Override
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public void save(Object data) {
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System.out.println("保存到文件:" + data);
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}
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}
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‎src/com/anxpp/designpattern/state/SaveDataController.java‎

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package com.anxpp.designpattern.state;
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//环境（Context）
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public class SaveDataController {
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private ISaveData saveData;
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public void save(String data){
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//为了演示，此处的大的数据其实也是很小的
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if(data.length()<1<<2)
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saveData = SaveSmallData.instance;
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else if(data.length()<1<<4)
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saveData = SaveMiddleData.instance;
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else
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saveData = SaveBigData.instance;
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saveData.save(data);
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}
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}
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‎src/com/anxpp/designpattern/state/SaveMiddleData.java‎

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package com.anxpp.designpattern.state;
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//具体状态
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public enum SaveMiddleData implements ISaveData{
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instance;
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@Override
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public void save(Object data) {
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System.out.println("保存到Mysql:" + data);
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}
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}
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‎src/com/anxpp/designpattern/state/SaveSmallData.java‎

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package com.anxpp.designpattern.state;
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//具体状态
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public enum SaveSmallData implements ISaveData{
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instance;
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@Override
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public void save(Object data) {
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System.out.println("保存到Redis:" + data);
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}
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}
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‎src/com/anxpp/designpattern/state/TestUse.java‎

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package com.anxpp.designpattern.state;
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public class TestUse {
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public static void main(String args[]){
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String smallData = "小数据";
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String middleData = "介于小数据和大数据之间的数据";
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String bifgData = "这里就假定这是一个很大很大很大的数据";
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SaveDataController saveDataController = new SaveDataController();
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saveDataController.save(smallData);
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saveDataController.save(middleData);
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saveDataController.save(bifgData);
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}
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}
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‎src/com/anxpp/designpattern/state/package-info.java‎

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/**
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* @author Administrator
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* 状态模式
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*/
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package com.anxpp.designpattern.state;

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