JavaAbstractFactory模式表格化版本
本文最后更新于：1 年前
将关联零件组装成产品
1 - 方便统一处理Link和Tray的类
public abstract class Item {
protected String caption;
public Item(String caption){
this.caption = caption;
}
public abstract String makeHTML();
}2 - 抽象零件: 表示HTML的链接的类
public abstract class Link extends Item{
protected String url;
public Link(String caption, String url) {
super(caption);
this.url = url;
}
}3 - 抽象零件: 表示含有Link和Tray的类
public abstract class Tray extends Item{
protected ArrayList tray = new ArrayList();
public Tray(String caption) {
super(caption);
}
public void add(Item item){
tray.add(item);
}
}4 - 抽象零件: 表示含有HTML页面的类
public abstract class Page {
protected String title;
protected String author;
protected ArrayList content = new ArrayList();
public Page(String title, String author){
this.title = title;
this.author = author;
}
public void add(Item item){
content.add(item);
}
public void output(){
try {
String filename = title + ".html";
Writer writer = new FileWriter(filename);
writer.write(this.makeHTML());
writer.close();
System.out.println(filename + "编写完成");
}catch (IOException e){
e.printStackTrace();
}
}
public abstract String makeHTML();
}5 - 表示抽象工厂的类(制作Link, Tray, Page)
public abstract class Factory {
public static Factory getFactory(String classname){
Factory factory = null;
try {
factory = (Factory)Class.forName(classname).newInstance();
}catch (ClassNotFoundException e){
e.printStackTrace();
System.out.println("没有找到 " + classname + "类");
}catch (Exception e){
e.printStackTrace();
}
return factory;
}
public abstract Link createLink(String caption, String url);
public abstract Tray createTray(String caption, String url);
public abstract Page createPage(String title, String auto);
}6 - 具体的工厂: TableFactory(制作TableLink, TableTray, TablePage)
public class TableFactory extends Factory {
@Override
public Link createLink(String caption, String url) {
return new TableLink(caption, url);
}
@Override
public Tray createTray(String caption) {
return new TableTray(caption);
}
@Override
public Page createPage(String title, String auto) {
return new TablePage(title, auto);
}
}7 - 具体零件: 表示HTML的链接的类
public class TableLink extends Link{
public TableLink(String caption, String url) {
super(caption, url);
}
@Override
public String makeHTML() {
return " <td><a href=\"" + url + "\">" + caption + "</a></td>\n";
}
}8 - 具体零件: 表示含有Link和Tray的类
public class TableTray extends Tray {
public TableTray(String caption) {
super(caption);
}
@Override
public String makeHTML() {
StringBuilder buffer = new StringBuilder();
buffer.append("<td>");
buffer.append("<table width=\"100%\" border=\"1\"><tr>");
buffer.append("<td bgcolor=\"#cccccc\" align=\"center\" colspan=\"").append(tray.size()).append("\"><b>").append(caption).append("</b></td>");
buffer.append("</tr>\n");
buffer.append("<tr>\n");
for (Item item : tray) {
buffer.append(item.makeHTML());
}
buffer.append("</tr></table>");
buffer.append("</td>\n");
return buffer.toString();
}
}9 - 具体零件: 表示HTML页面的类
public class TablePage extends Page{
public TablePage(String title, String author) {
super(title, author);
}
@Override
public String makeHTML() {
StringBuilder buffer = new StringBuilder();
buffer.append("<html><head><title>").append(title).append("</title></head>\n");
buffer.append("<body>\n");
buffer.append("<h1>").append(title).append("</h1>\n");
buffer.append("<table width=\"80%\" border=\"3\">\n");
for (Item item : content) {
buffer.append("<tr>").append(item.makeHTML()).append("</tr>");
}
buffer.append("</table>\n");
buffer.append("<hr><address>").append(author).append("</address>");
buffer.append("</body></html>\n");
return buffer.toString();
}
}10 - 测试程序行为的类
需要设置参数args[] = tablefactory.TableFactory
public class Main {
public static void main(String[] args) {
if (args.length != 1){
System.out.println("Usage: java Main class.name.of.ConcreteFactory");
System.out.println("Example 1: java Main listFactory.ListFactory");
System.out.println("Example 2: java Main tableFactory.TableFactory");
System.exit(0);
}
Factory factory = Factory.getFactory(args[0]);
Link people = factory.createLink("人民日报", "http://www.people.com.cn/");
Link gmw = factory.createLink("光明日报", "http://www.gmw.cn/");
Link us_yahoo = factory.createLink("Yahoo!", "http://www.yahoo.com/");
Link jp_yahoo = factory.createLink("Yahoo!Japan!", "http://www.yahoo.co.jp");
Link excite = factory.createLink("Excite", "http://www.excite.com/");
Link google = factory.createLink("Google", "http://www.google.com/");
Tray trayNews = factory.createTray("日报");
trayNews.add(people);
trayNews.add(gmw);
Tray trayYahoo = factory.createTray("Yahoo!");
trayYahoo.add(us_yahoo);
trayYahoo.add(jp_yahoo);
Tray traySearch = factory.createTray("检索引擎");
traySearch.add(trayYahoo);
traySearch.add(excite);
traySearch.add(google);
Page page = factory.createPage("LinkPage", "杨文轩");
page.add(trayNews);
page.add(traySearch);
page.output();
}
}11 - 输出示例
LinkPage.html编写完成
HTML文本效果图LinkPage
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杨文轩
具体源码
<html><head><title>LinkPage</title></head>
<body>
<h1>LinkPage</h1>
<table width="80%" border="3">
<tr><td><table width="100%" border="1"><tr><td bgcolor="#cccccc" align="center" colspan="2"><b>日报</b></td></tr>
<tr>
<td><a href="http://www.people.com.cn/">人民日报</a></td>
<td><a href="http://www.gmw.cn/">光明日报</a></td>
</tr></table></td>
</tr><tr><td><table width="100%" border="1"><tr><td bgcolor="#cccccc" align="center" colspan="3"><b>检索引擎</b></td></tr>
<tr>
<td><table width="100%" border="1"><tr><td bgcolor="#cccccc" align="center" colspan="2"><b>Yahoo!</b></td></tr>
<tr>
<td><a href="http://www.yahoo.com/">Yahoo!</a></td>
<td><a href="http://www.yahoo.co.jp">Yahoo!Japan!</a></td>
</tr></table></td>
<td><a href="http://www.excite.com/">Excite</a></td>
<td><a href="http://www.google.com/">Google</a></td>
</tr></table></td>
</tr></table>
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