标签：建造者模式

Builder Pattern 

BenzBuilder类中有一个私有属性BenzModel，一个设置序列方法和获得BenzModel方法，通过建造者Builder设置序列并且获得对象。

产品

public abstract class CarModel {
 private ArrayList<String> sequence = new ArrayList<String>();

 public abstract void start();

 public abstract void stop();

 public abstract void alarm();

 public abstract void engineBoom();

 public void run() {
  for (int i = 0; i < sequence.size(); i++) {
   String actionName = sequence.get(i);
   if (actionName.equalsIgnoreCase("start")) {
    this.start();
   } else if (actionName.equalsIgnoreCase("stop")) {
    this.stop();
   } else if (actionName.equalsIgnoreCase("alarm")) {
    this.alarm();
   } else if (actionName.equalsIgnoreCase("engineBoom")) {
    this.engineBoom();
   }
  }
 }

 final public void setSequence(ArrayList<String> sequence) {
  this.sequence = sequence;
 }
}

public class BenzModel extends CarModel {

 @Override
 public void alarm() {
  System.out.println("奔驰叫");
 }

 @Override
 public void engineBoom() {
  System.out.println("奔驰轰轰轰");
 }

 @Override
 public void start() {
  System.out.println("奔驰启动");
 }

 @Override
 public void stop() {
  System.out.println("奔驰停止");
 }
}

建造者

public abstract class CarBuilder {
 
 public abstract void setSequence(ArrayList<String> sequence);
 
 public abstract CarModel getCarModel();
}

//奔驰组装者
public class BenzBuilder extends CarBuilder {
 private BenzModel benz=new BenzModel();  //这里是关键
 
 @Override
 public CarModel getCarModel() {
  return this.benz;
 }

 @Override
 public void setSequence(ArrayList<String> sequence) {
  this.benz.setSequence(sequence);
 }
}

这里就可以随便组装啦

public static void main(String[] args) {
   ArrayList<String> sequence=new ArrayList<String>();
   sequence.add("start");
   sequence.add("stop");
   sequence.add("engineBoom");
   BenzBuilder builder=new BenzBuilder();
   builder.setSequence(sequence);
   BenzModel benzModel=(BenzModel) builder.getCarModel();
   benzModel.run();
 }

设计模式_建造者模式

标签：建造者模式

原文地址：http://blog.csdn.net/cjvs9k/article/details/46945813