设计模式----模板方法模式（template method pattern）
HummerModel.java代码如下：
package com.designPattern.templateMethod; public abstract class HummerModel {protected abstract void start();protected abstract void stop();protected abstract void alarm();protected abstract void engineBoom();/** * 这就是模板方法：run()定义了其他方法的顺序，并且子类不能修改这个run()方法(修饰符为final) * 在模板方法中按照一定的规则和顺序调用抽象方法，抽象方法在不同的子类中内容不同 */final public void run(){this.start();this.engineBoom();if(this.isAlarm()){this.alarm();}this.stop();}protected boolean isAlarm(){return true;}}package com.designPattern.templateMethod;public class HummerH1Model extends HummerModel{private boolean alarmFlag = true;@Overrideprotected void start() {System.out.println("悍马1启动！");}@Overrideprotected void stop() {System.out.println("悍马1停车！");}@Overrideprotected void alarm() {System.out.println("悍马1鸣笛！");}@Overrideprotected void engineBoom() {System.out.println("悍马1引擎启动！");}protected boolean isAlarm(){return this.alarmFlag;}public void setAlarm(boolean isAlarm){this.alarmFlag = isAlarm;}}package com.designPattern.templateMethod;public class HummerH2Model extends HummerModel{@Overrideprotected void start() {System.out.println("悍马2发动!");}@Overrideprotected void stop() {System.out.println("悍马2停车！");}@Overrideprotected void alarm() {System.out.println("悍马2鸣笛！");}@Overrideprotected void engineBoom() {System.out.println("悍马2引擎启动！");}public boolean isAlarm(){return false;}}package com.designPattern.templateMethod;public class Client {public static void main(String[] args) {HummerModel h1 = new HummerH1Model();h1.run();HummerModel h2 = new HummerH2Model();h2.run();}}悍马1启动！悍马1引擎启动！悍马1鸣笛！悍马1停车！悍马2发动!悍马2引擎启动！悍马2停车！