设计模式实战：内容管理系统的设计与实现
// 内容抽象类
abstract class Content {
protected String title;
protected String body;
public String getTitle() {
return title;
}
public String getBody() {
return body;
}
@Override
public String toString() {
return "Title: " + title + "\nBody: " + body;
}
}
// 文章内容类
class Article extends Content {
private String author;
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
}
// 页面内容类
class Page extends Content {
private String layout;
public String getLayout() {
return layout;
}
public void setLayout(String layout) {
this.layout = layout;
}
}
// 媒体内容类
class Media extends Content {
private String mediaType;
public String getMediaType() {
return mediaType;
}
public void setMediaType(String mediaType) {
this.mediaType = mediaType;
}
}
// 内容建造者接口
interface ContentBuilder {
void buildTitle(String title);
void buildBody(String body);
Content getContent();
}
// 文章建造者
class ArticleBuilder implements ContentBuilder {
private Article article = new Article();
@Override
public void buildTitle(String title) {
article.title = title;
}
@Override
public void buildBody(String body) {
article.body = body;
}
public void buildAuthor(String author) {
article.setAuthor(author);
}
@Override
public Content getContent() {
return article;
}
}
// 页面建造者
class PageBuilder implements ContentBuilder {
private Page page = new Page();
@Override
public void buildTitle(String title) {
page.title = title;
}
@Override
public void buildBody(String body) {
page.body = body;
}
public void buildLayout(String layout) {
page.setLayout(layout);
}
@Override
public Content getContent() {
return page;
}
}
// 媒体建造者
class MediaBuilder implements ContentBuilder {
private Media media = new Media();
@Override
public void buildTitle(String title) {
media.title = title;
}
@Override
public void buildBody(String body) {
media.body = body;
}
public void buildMediaType(String mediaType) {
media.setMediaType(mediaType);
}
@Override
public Content getContent() {
return media;
}
}