Java设计模式之建造者模式实例详解

package org.test.design.build;/** * 影视，书籍等作品 * @author lushuaiyin * */public abstract class Product {  public String author;//作者  public int funds=0;//耗资  public String workName;//作品名称  public String workType;//作品类型  public String content;//其他信息  public String getAuthor() {    return author;  }  public void setAuthor(String author) {    this.author = author;  }  public int getFunds() {    return funds;  }  public void setFunds(int funds) {    this.funds = funds;  }  public String getWorkName() {    return workName;  }  public void setWorkName(String workName) {    this.workName = workName;  }  public String getWorkType() {    return workType;  }  public void setWorkType(String workType) {    this.workType = workType;  }  public String getContent() {    return content;  }  public void setContent(String content) {    this.content = content;  }  public String printString() {    return "Product [author=" + author + ", funds=" + funds + ", workName="        + workName + ", workType=" + workType + ", content=" + content        + "]";  }}

package org.test.design.build;public class Movie extends Product{  private String actor;//主演  private String director;//导演  public String getActor() {    return actor;  }  public void setActor(String actor) {    this.actor = actor;  }  public String getDirector() {    return director;  }  public void setDirector(String director) {    this.director = director;  }}

package org.test.design.build;public class Book extends Product {  private int price=0;  public int getPrice() {    return price;  }  public void setPrice(int price) {    this.price = price;  }}

package org.test.design.build;/** * 对象的构建逻辑描述 * 影视，书籍等作品创建步骤 * @author lushuaiyin * */public interface Builder {  void recruiting();//人员招募  void writeScript();//写剧本，书  void raiseFunds();//筹集资金  void propagate();//宣传  void released();//出版，发行，上映  Product buildProduct();}

package org.test.design.build;/** * Movie对象的构建逻辑具体实施 * @author lushuaiyin * */public class MovieBuilder implements Builder {  public Product movie=new Movie();//这里是上转型对象的使用  /*   假如我们创建的对象只关心行为特征，那么就可以使用父类或者接口来声明对象。  这样就不会在创建的时候就不会涉及到具体对象类的其他私有属性。  如果我们在创建的时候，关心这些属性。那么就直接使用子类new出对象。  Movie movie=new Movie();   */  public void recruiting() {    movie.setAuthor("詹姆斯・卡梅隆");  }  public void writeScript() {    movie.setWorkName("阿凡达");  }  public void raiseFunds() {    movie.setFunds(200000);  }  public void propagate() {    movie.setContent("首部3D科幻巨作！");  }  public void released() {    movie.setWorkType("3D电影");  }  public Product buildProduct() {    return movie;  }}

package org.test.design.build;/** * Book对象的构建逻辑具体实施 * @author lushuaiyin * */public class BookBuilder implements Builder {  public Product book=new Book();//这里是上转型对象的使用  public void recruiting() {    book.setAuthor("J.K.罗琳著小说");  }  public void writeScript() {    book.setWorkName("哈利・波特与魔法石");  }  public void raiseFunds() {    book.setFunds(10000);  }  public void propagate() {    book.setContent("最畅销的的魔幻小说！");  }  public void released() {    book.setWorkType("小说");  }  public Product buildProduct() {    return book;  }}

package org.test.design.build;/** * 指挥者角色 * @author lushuaiyin * */public class Director {  public Product bulidProduct(Builder builder){    builder.raiseFunds();//筹集资金    builder.recruiting();//招募人员    builder.propagate();//宣传    builder.released();//发行，上映    return builder.buildProduct();  }}

package org.test.design.build;public class TestMain {  /**   * @param args   */  public static void main(String[] args) {    Director director=new Director();//指挥者角色    //一部电影的产生    MovieBuilder movieBuilder=new MovieBuilder();    Product movie=director.bulidProduct(movieBuilder);    System.out.println(movie.printString());    // 一部小说的产生    BookBuilder bookBuilder=new BookBuilder();    Product book=director.bulidProduct(bookBuilder);    System.out.println(book.printString());  }}/*打印Product [author=詹姆斯・卡梅隆, funds=200000, workName=null, workType=3D电影, content=首部3D科幻巨作！]Product [author=J.K.罗琳著小说, funds=10000, workName=null, workType=小说, content=最畅销的的魔幻小说！]*/