Java桥接模式实例详解【简单版与升级版】

2019-11-26 08:46:20

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本文实例讲述了Java桥接模式。分享给大家供大家参考，具体如下：

桥接模式简单版

一代码

class Meal{  protected MealImp imp;  public Meal()  {    imp = new AmericanMealImp();  }  public Meal(String type)  {    if (type.equals("American"))      imp = new AmericanMealImp();    if (type.equals("Italian"))      imp = new ItalianMealImp();  }  public void getFirstCourse() {    imp.getAppetizer();  }  public void getSecondCourse() {    imp.getMeat();  }  public void getBeverage() {    imp.getBeverage();  }  public void getDessert() {    imp.getDessert();  }}interface MealImp {  public abstract void getAppetizer();  public abstract void getSoup();  public abstract void getSalad();  public abstract void getFish();  public abstract void getMeat();  public abstract void getSorbet();  public abstract void getPasta();  public abstract void getBeverage();  public abstract void getDessert();  public abstract void getSandwich();}class AmericanMealImp implements MealImp {  public void getAppetizer()  {    System.out.println("开胃菜  : 烤干酪"); }  public void getSoup()    {}  public void getSalad()    {}  public void getFish()    {}  public void getMeat()    {    System.out.println("肉食    :牛排"); }  public void getPasta()    {}  public void getBeverage()  {    System.out.println("酒水    :啤酒"); }  public void getDessert()   {    System.out.println("餐后甜点:苹果派"); }  public void getSorbet()   {}  public void getSandwich()  {}}class ItalianMealImp implements MealImp {  public void getAppetizer()  {    System.out.println("开胃菜: 意大利蔬菜拼盘"); }  public void getSoup()    {}  public void getSalad()    {}  public void getFish()    {}  public void getMeat()    {    System.out.println("肉食:   意大利柠檬香煎鸡排"); }  public void getPasta()    {}  public void getCheesePlate() {}  public void getBeverage()  {    System.out.println("酒水: 卡布奇诺咖啡"); }  public void getDessert()   {    System.out.println("餐后甜点:  冰淇淋"); }  public void getSorbet()   {}  public void getSandwich()  {}}public class CustomerBridgeDemo {  private Meal meal;  public CustomerBridgeDemo(Meal aMeal) { meal = aMeal; }  public void eat() {    meal.getFirstCourse();    meal.getSecondCourse();    meal.getBeverage();    meal.getDessert();  }  public static void main(String[] args) {    Meal aMeal = null;    if (args.length == 0) {      aMeal = new Meal();    }    else if (args.length == 1) {      if (!(args[0].equals("American")) && !(args[0].equals("Italian")) ) {        System.err.println("输入参数有误！");        System.err.println("正确用法: java Customer [American|Italian]");        System.exit(1);      }      else {        aMeal = new Meal(args[0]);      }    }    else { // error      System.err.println("输入参数有误！");      System.err.println("正确用法: java Customer [American|Italian]");      System.exit(1);    }    CustomerBridgeDemo cus = new CustomerBridgeDemo(aMeal);    cus.eat();  }}

二运行

开胃菜    : 烤干酪
肉食        :牛排
酒水        :啤酒
餐后甜点:苹果派

三类图

桥接模式升级版

一代码

class Meal {  protected MealImp imp;  public Meal() {    imp = new AmericanMealImp();  }  public Meal( String type ) {    if (type.equals("American"))      imp = new AmericanMealImp();    if (type.equals("Italian"))      imp = new ItalianMealImp();  }  public void getFirstCourse() {    imp.getAppetizer();  }  public void getSecondCourse() {    imp.getMeat();  }  public void getBeverage() {    imp.getBeverage();  }  public void getDessert() {    imp.getDessert();  }}interface MealImp {  public abstract void getAppetizer();  public abstract void getSoup();  public abstract void getSalad();  public abstract void getFish();  public abstract void getMeat();  public abstract void getSorbet();  public abstract void getPasta();  public abstract void getBeverage();  public abstract void getDessert();  public abstract void getSandwich();}class AmericanMealImp implements MealImp {  public void getAppetizer() {    System.out.println("开胃菜  : 烤干酪");  }  public void getSoup() {  }  public void getSalad() {  }  public void getFish() {  }  public void getMeat() {    System.out.println("肉食    :牛排");  }  public void getPasta() {  }  public void getBeverage() {    System.out.println("酒水    :啤酒");  }  public void getDessert() {    System.out.println("餐后甜点:苹果派");  }  public void getSorbet() {  }  public void getSandwich() {  }}class ItalianMealImp implements MealImp {  public void getAppetizer() {    System.out.println("开胃菜: 意大利蔬菜拼盘");  }  public void getSoup() {  }  public void getSalad() {  }  public void getFish() {  }  public void getMeat() {    System.out.println("肉食:   意大利柠檬香煎鸡排");  }  public void getPasta() {  }  public void getCheesePlate() {  }  public void getBeverage() {    System.out.println("酒水: 卡普齐诺咖啡");  }  public void getDessert() {    System.out.println("餐后甜点:  冰淇淋");  }  public void getSorbet() {  }  public void getSandwich() {  }}class Snack extends Meal {  Snack() {    super();  }  Snack( String type ) {    super(type);  }  public void getSnack() {  //甜点    imp.getAppetizer();  }}class Lunch extends Meal {  Lunch() {    super();  }  Lunch( String type ) {    super(type);  }  public void getLunch() {  //午餐    imp.getSandwich();   //三明治    imp.getBeverage();   //饮品  }}class FiveCourseMeal extends Meal {  FiveCourseMeal() {    super();  }  FiveCourseMeal( String type ) {    super(type);  }  public void getEnormousDinner() {  //大餐    imp.getAppetizer();  //开胃菜    imp.getSorbet();   //果汁冰水    imp.getSoup();    //汤    imp.getSorbet();   //果汁冰水    imp.getSalad();    //沙拉    imp.getSorbet();   //果汁冰水    imp.getFish();    //鱼    imp.getSorbet();   //果汁冰水    imp.getMeat();    //肉    imp.getDessert();   //果汁冰水    imp.getBeverage();  //酒水  }}public class CustomerBridgeDemo2 {  private FiveCourseMeal bigMeal;  public CustomerBridgeDemo2( FiveCourseMeal meal ) {    this.bigMeal = meal;  }  public void eat() {    bigMeal.getEnormousDinner();    bigMeal.getDessert(); //单点一个甜点，老菜谱依然有效  }  public static void main( String[] args ) {    FiveCourseMeal aMeal = null;    if (args.length == 0) {      aMeal = new FiveCourseMeal();    } else if (args.length == 1) {      if (!(args[0].equals("American")) && !(args[0].equals("Italian"))) {        System.err.println("输入参数有误！");        System.err.println("正确用法: java Customer [American|Italian]");        System.exit(1);      } else {        aMeal = new FiveCourseMeal(args[0]);      }    } else {      System.err.println("输入参数有误！");      System.err.println("正确用法: java Customer [American|Italian]");      System.exit(1);    }    CustomerBridgeDemo2 cus = new CustomerBridgeDemo2(aMeal);    cus.eat();  }}

二运行