设计模式 - 创建者模式

// Person
public class Person {
private String head;
private String body;
private String foot;
public String getHead() {
return head;
}
public void setHead(String head) {
this.head= head;
}
public String getBody() {
return body;
}
public String getFoot() {
return foot;
}
public void setFoot(String foot) {
this.foot= foot;
}
public void setBody(String body) {
this.body= body;
}
}
//Builder接口
public interface PersonBuilder
{
   void buildHead();
   void buildBody();
   void buildFoot();
   Person buildPerson();
}
//Builder实现:人类
publicclass HumanBuilder implements PersonBuilder
{
   private Person person;
   public HumanBuilder()
   {
      this.person=new Person();
   }
   public void buildBody() 
   {
      this.person.setBody("创建 人类 身体！");
   }
publicvoid buildFoot() 
{
   this.person.setFoot("创建 人类 脚！");
}
publicvoid buildHead() {
this.person.setHead("创建 人类 头！");
}
public Person buildPerson() {
return person;
}
}
//Builder实现:变形金刚
publicclass TransformerBuilder implements PersonBuilder {
private Person person;
public TransformerBuilder(){
this.person=newPerson();
}
publicvoid buildBody() {
this.person.setBody("创建 变形金刚 身体！");
}
public void buildFoot() {
this.person.setFoot("创建 变形金刚 脚！");
}
publicvoid buildHead() {
this.person.setHead("创建 变形金刚 头！");
}
public Person buildPerson() {
return person;
}
}
//Director构建向导
publicclass PersonDirector 
{
   public Person constructPerson(PersonBuilder pb)
   {
      pb.buildHead();
      pb.buildBody();
      pb.buildFoot();
      return pb.buildPerson();
   }
}
//测试
publicclass Test 
{
   publicstaticvoid main(String[] args) 
   {
   PersonDirector pd = new PersonDirector();
   Person person = pd.constructPerson(new HumanBuilder());
   System.out.println(person.getBody());
   System.out.println(person.getFoot());
   System.out.println(person.getHead() +" \n");
   Person transformer = pd.constructPerson(newTransformerBuilder());
   System.out.println(transformer.getBody());
   System.out.println(transformer.getFoot());
   System.out.println(transformer.getHead());
   }
}