【GOF23设计模式】建造者模式

来源：http://www.bjsxt.com/ 
一、【GOF23设计模式】建造者模式详解类图关系

建造飞船

 package com.test.Builder;

 public class AirShip {
     private OrbitalModule orbitalModule;//轨道舱
     private Engine engine;//发动机
     private EscapeTower escapeTower;//逃逸塔

     public void launch(){
         System.out.println("发射！");
     }

     public OrbitalModule getOrbitalModule() {
         return orbitalModule;
     }
     public void setOrbitalModule(OrbitalModule orbitalModule) {
         this.orbitalModule = orbitalModule;
     }
     public Engine getEngine() {
         return engine;
     }
     public void setEngine(Engine engine) {
         this.engine = engine;
     }
     public EscapeTower getEscapeTower() {
         return escapeTower;
     }
     public void setEscapeTower(EscapeTower escapeTower) {
         this.escapeTower = escapeTower;
     }
 }

 class OrbitalModule{
     private String name;

     public OrbitalModule(String name) {
         super();
         this.name = name;
     }

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }
 }
 class Engine{
     private String name;

     public Engine(String name) {
         super();
         this.name = name;
     }

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }
 }
 class EscapeTower{
     private String name;

     public EscapeTower(String name) {
         super();
         this.name = name;
     }

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }
 }

构造接口

 package com.test.Builder;

 public interface AirShipBuilder {
     OrbitalModule buildOrbitalModule();
     Engine builderEngine();
     EscapeTower builderEscapeTower();
 }

组装接口

 package com.test.Builder;

 public interface AirShipDirector {
     /**
      * 组装飞船对象
      */
     AirShip directAirShip();
 }

构造实现类

 package com.test.Builder;
 /**
  * StringBuilder，以后学习XML解析中，JDOM库中的类：DomBuilder,SaxBuilder
  */
 public class SxtAirShipBuilder implements AirShipBuilder{

     @Override
     public OrbitalModule buildOrbitalModule() {
         System.out.println("构建sxt轨道舱");
         return new OrbitalModule("sxt轨道舱");
     }

     @Override
     public Engine builderEngine() {
         System.out.println("构建sxt发动机");
         return new Engine("sxt发动机");
     }

     @Override
     public EscapeTower builderEscapeTower() {
         System.out.println("构建sxt逃逸塔");
         return new EscapeTower("sxt逃逸塔");
     }
 }

组装实现类

 package com.test.Builder;

 public class SxtAirShipDirector implements AirShipDirector{

     private AirShipBuilder builder;

     public SxtAirShipDirector(AirShipBuilder builder) {
         super();
         this.builder = builder;
     }

     @Override
     public AirShip directAirShip() {
         OrbitalModule o = builder.buildOrbitalModule();
         Engine e = builder.builderEngine();
         EscapeTower et = builder.builderEscapeTower();

         AirShip ship = new AirShip();
         ship.setOrbitalModule(o);
         ship.setEngine(e);
         ship.setEscapeTower(et);
         return ship;
     }
 }

 package com.test.Builder;

 public class Client {
     public static void main(String[] args) {
         AirShipDirector director = new SxtAirShipDirector(new SxtAirShipBuilder());
         AirShip ship = director.directAirShip();
         System.out.println(ship.getEngine().getName());
         ship.launch();
     }
 }