在我们日常生活中，如构建一个飞船，一个手机，一栋建筑，都会有非常复杂的组装，这时候应该用到建造者模式
以建造一个飞船为例
案例：造小页飞船
1.飞船各部分元件
package com.littlepage.BuilderPattern;
public interface AirShipBuilder {
Engine builderEngine();
OrbitalModule builderOrbitalModule();
Escape builderEscape();
}
2.飞船实体用来组装
package com.littlepage.BuilderPattern;
public class AirShip {
private OrbitalModule orbitalModule;
private Engine engine;
private Escape escape;
public void lauch(){
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 Escape getEscape() {
return escape;
}
public void setEscape(Escape escape) {
this.escape = escape;
}
}
class OrbitalModule{
private String name;
public OrbitalModule(String name) {
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) {
this.name=name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
class Escape{
private String name;
public Escape(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
3.创造方法的接口
package com.littlepage.BuilderPattern;
/*
*组装飞船对象
*/
public interface AirShipDirector {
AirShip createAirship();
}
4.实现组件（小页飞船组件）
package com.littlepage.BuilderPattern;
public class LittlePageShipBuilder implements AirShipBuilder{
@Override
public Engine builderEngine() {
System.out.println("页牌发动机");
return new Engine("页牌发动机");
}
@Override
public OrbitalModule builderOrbitalModule() {
System.out.println("页牌逃逸塔");
return new OrbitalModule("页牌逃逸塔");
}
@Override
public Escape builderEscape() {
System.out.println("页牌轨道舱");
return new Escape("页牌轨道舱");
}
}
5.实体实现装配
package com.littlepage.BuilderPattern;
public class LittlePageAirshipDirector implements AirShipDirector{
private AirShipBuilder builder;
public LittlePageAirshipDirector(AirShipBuilder builder) {
this.builder = builder;
}
@Override
public AirShip createAirship() {
Engine e=builder.builderEngine();
OrbitalModule om=builder.builderOrbitalModule();
Escape et=builder.builderEscape();
AirShip ship=new AirShip();
ship.setEngine(e);
ship.setOrbitalModule(om);
ship.setEscape(et);
return ship;
}
}
6.客户端的串接（测试）
package com.littlepage.BuilderPattern;
public class Client {
public static void main(String[] args) {
AirShipDirector dir=new LittlePageAirshipDirector(new LittlePageShipBuilder());
AirShip air=dir.createAirship();
System.out.println(air.getEngine());
air.lauch();
}
}