构造者模式其实就是这个目的——某些类创建实例的时候，过程是一样的，但由于过程繁琐，很容易缺东少西组件没构造全。为了防止这种情况，我们将构造过程抽出来，统一管理，避免该问题发生。

首先，我们定义这个统一的过程：

package interfaze; / * 所有游戏人物的套装均需遵守的约束 * * @author lxp * */ public interface ISkin { / * 获取头盔 */ void gainHelmet(); / * 获取战衣 */ void gainBattleSuit(); / * 获取坐骑 */ void gainMount(); } 

讯享网

讯享网package impl; import bean.BattleSuit; import bean.Helmet; import bean.Mount; import interfaze.ISkin; import supper.Person; / * 软妹型游戏人物 * * @author lxp * */ public class SoftGirl extends Person implements ISkin { / * 获得头盔 */ @Override public void gainHelmet() { System.out.println("我有了" + this.getHelmet().getName()); } @Override public void gainBattleSuit() { System.out.println("我有了" + this.getBattleSuit().getName()); } @Override public void gainMount() { System.out.println("我有了" + this.getMount().getName()); } public SoftGirl(Helmet helmet, BattleSuit battleSuit, Mount mount) { super(helmet, battleSuit, mount); } } 

package impl; import bean.BattleSuit; import bean.Helmet; import bean.Mount; import interfaze.ISkin; import supper.Person; / * 五大三粗型游戏人物 * * @author lxp * */ public class Strong extends Person implements ISkin { @Override public void gainHelmet() { System.out.println("我有了" + this.getHelmet().getName()); } @Override public void gainBattleSuit() { System.out.println("我有了" + this.getBattleSuit().getName()); } @Override public void gainMount() { System.out.println("我有了" + this.getMount().getName()); } public Strong(Helmet helmet, BattleSuit battleSuit, Mount mount) { super(helmet, battleSuit, mount); } } 

讯享网package common; import interfaze.ISkin; import supper.Person; public class Builder { / * 创建的任务 */ private Person p; / * 所有的人物的组装都在这里，不会遗漏某一环节。 */ public void createPerson() { ((ISkin) p).gainHelmet(); ((ISkin) p).gainBattleSuit(); ((ISkin) p).gainMount(); } public Builder(Person p) { super(); this.p = p; } } 

package supper; / * 装备的父类 * * @author lxp * */ public class Equpment { / * 装备名称 */ private String name; public String getName() { return name; } public void setName(String name) { this.name = name; } } 

讯享网package supper; import bean.BattleSuit; import bean.Helmet; import bean.Mount; / * 人物类共用的 * * @author lxp * */ public class Person { / * 头盔 */ private Helmet helmet; / * 战衣 */ private BattleSuit battleSuit; / * 坐骑 */ private Mount mount; public Helmet getHelmet() { return helmet; } public void setHelmet(Helmet helmet) { this.helmet = helmet; } public BattleSuit getBattleSuit() { return battleSuit; } public void setBattleSuit(BattleSuit battleSuit) { this.battleSuit = battleSuit; } public Mount getMount() { return mount; } public void setMount(Mount mount) { this.mount = mount; } public Person(Helmet helmet, BattleSuit battleSuit, Mount mount) { super(); this.helmet = helmet; this.battleSuit = battleSuit; this.mount = mount; } } 

package bean; import supper.Equpment; / * 坐骑类 * * @author lxp * */ public class Mount extends Equpment { / * 设置坐骑名称 * * @param mount */ public Mount(String mount) { this.setName(mount); } } 

讯享网package bean; import supper.Equpment; / * 头盔类 * * @author lxp * */ public class Helmet extends Equpment { / * 设置头盔名称 * * @param helmet */ public Helmet(String helmet) { this.setName(helmet); } } 

package bean; import supper.Equpment; / * 战衣类 * * @author lxp * */ public class BattleSuit extends Equpment { / * 设置战衣名称 * * @param battleSuit */ public BattleSuit(String battleSuit) { this.setName(battleSuit); } } 

讯享网package test; import bean.BattleSuit; import bean.Helmet; import bean.Mount; import common.Builder; import impl.SoftGirl; import impl.Strong; public class TestBuilder { public static void main(String[] args) { Helmet softHelmet = new Helmet("粉红头盔"); Helmet strongHelmet = new Helmet("飞天头盔"); BattleSuit softSuit = new BattleSuit("粉色战衣"); BattleSuit strongSuit = new BattleSuit("侠盗战衣"); Mount softMount = new Mount("粉红坐骑"); Mount strongMount = new Mount("瀚海麒麟"); Builder softGirl = new Builder(new SoftGirl(softHelmet, softSuit, softMount)); Builder strong = new Builder(new Strong(strongHelmet, strongSuit, strongMount)); // 无论是哪种任务的构建过程都是统一控制的，不会出现缺东少西，尤其是组件多的情况下。 // 缺点是，稍有这种情况，某些实例有相同的构建过程。 // 故只将共同的提取出来为好。 softGirl.createPerson(); strong.createPerson(); } }