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anxppanxpp
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适配器模式
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‎src/com/anxpp/designpattern/adapter/Adaptee.java‎

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package com.anxpp.designpattern.adapter;
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//被适配者
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class Adaptee{
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void playMp3(Object src){
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System.out.println("播放MP3：" + src);
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}
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}

‎src/com/anxpp/designpattern/adapter/ClassAdapter.java‎

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package com.anxpp.designpattern.adapter;
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//类适配器
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public class ClassAdapter extends Adaptee implements Target {
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@Override
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public void playFlac(Object src) {
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//可能需要对src作处理
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playMp3(src);
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}
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}

‎src/com/anxpp/designpattern/adapter/List/Book.java‎

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package com.anxpp.designpattern.adapter.List;
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import java.util.Enumeration;
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import java.util.Vector;
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//被适配者
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public class Book{
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private Vector<String> books;
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public Book(){
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books = new Vector<String>();
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}
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public void add(String book){
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books.add(book);
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}
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public Enumeration<String> getEnum(){
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return books.elements();
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}
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}

‎src/com/anxpp/designpattern/adapter/List/BookAdapter.java‎

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package com.anxpp.designpattern.adapter.List;
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import java.util.Iterator;
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//适配器
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public class BookAdapter extends Book implements Iterable<String>{
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@Override
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public Iterator<String> iterator() {
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return new IteratorAdapter(getEnum());
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}
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}

‎src/com/anxpp/designpattern/adapter/List/IteratorAdapter.java‎

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package com.anxpp.designpattern.adapter.List;
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import java.util.Enumeration;
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import java.util.Iterator;
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//适配器，目标就是Iterator，被适配者是Enumeration
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public class IteratorAdapter implements Iterator<String> {
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Enumeration<String> myEnum;
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public IteratorAdapter(Enumeration<String> myEnum){
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this.myEnum = myEnum;
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}
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@Override
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public boolean hasNext() {
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return myEnum.hasMoreElements();
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}
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@Override
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public String next() {
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return myEnum.nextElement();
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}
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}

‎src/com/anxpp/designpattern/adapter/List/TestUse.java‎

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package com.anxpp.designpattern.adapter.List;
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import java.util.Iterator;
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public class TestUse {
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public static void main(String args[]){
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BookAdapter books = new BookAdapter();
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books.add("think in java");
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books.add("c++ primer");
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books.add("伊索寓言");
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Iterator<String> iterator = books.iterator();
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while(iterator.hasNext()){
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System.out.println(iterator.next());
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}
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}
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}

‎src/com/anxpp/designpattern/adapter/List/package-info.java‎

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/**
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* @author Administrator
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*/
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package com.anxpp.designpattern.adapter.List;

‎src/com/anxpp/designpattern/adapter/ObjectAdapter.java‎

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package com.anxpp.designpattern.adapter;
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//对象适配器
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public class ObjectAdapter implements Target{
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private Adaptee adaptee;
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public ObjectAdapter(){
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super();
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adaptee = new Adaptee();
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}
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@Override
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public void playFlac(Object src) {
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//可能需要对src作处理
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adaptee.playMp3(src);
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}
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}

‎src/com/anxpp/designpattern/adapter/Target.java‎

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package com.anxpp.designpattern.adapter;
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//目标，也就是用户所希望使用的
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interface Target{
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void playFlac(Object src);
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}

‎src/com/anxpp/designpattern/adapter/TestUse.java‎

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package com.anxpp.designpattern.adapter;
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public class TestUse {
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public static void main(String args[]){
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Adaptee adaptee = new Adaptee();
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adaptee.playMp3("mp3");
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Target target = new ClassAdapter();
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target.playFlac("flac");
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target = new ObjectAdapter();
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target.playFlac("flac");
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}
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}

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