Java设计模式之简单工厂模式

2020-12-24 18:02:10 阅读：191 来源： 互联网

标签：Java ratheuapo 工厂 teteighprcjwh collections https dribbble 设计模式 com

Java设计模式之简单工厂模式

- 简单工厂模式
  
  使用参数或者配置文件等事先定义好的变量，然后利用分支判断初始化具体产品类并返回；
  不符合“开发-封闭”原则，每次增加产品，都需要修改类方法。工厂类单一，不用维护大量的工厂类；
  工厂方法模式和抽象工厂模式规避了不符合“开发-封闭”原则，同时支持更灵活的增加产品；
- 适用性
  
  1）当一个类不知道它所必须创建的对象的类的时候。
  2）当一个类希望由它的子类来指定它所创建的对象的时候。
- 举例
  
  如哈佛汽车加工厂既可以生产跑车又可以生产卡车。
- UML类图
- 代码示例
  - 定义哈佛汽车接口（或抽象类）
```
package com.jin.demo.DesignPatterns.Factory.SimpleFactory;

/**
 * 定义哈佛汽车接口（或抽象类）
 * @auther jinsx
 * @date 2019-05-15 08:58
 */
public interface HFCar {
	// 什么汽车都可以跑
	void run();
}
```
    - 1
    - 2
    - 3
    - 4
    - 5
    - 6
    - 7
    - 8
    - 9
    - 10
    - 11
  - 哈佛跑车
```
package com.jin.demo.DesignPatterns.Factory.SimpleFactory;

/**
 * 哈佛跑车
 * @auther jinsx
 * @date 2019-05-15 09:00
 */
public class HFRoadster implements HFCar{
	@Override
	public void run() {
		System.out.println("哈佛小跑车，起步就是快");
	}
}
```
    - 1
    - 2
    - 3
    - 4
    - 5
    - 6
    - 7
    - 8
    - 9
    - 10
    - 11
    - 12
    - 13
  - 哈佛卡车
```
package com.jin.demo.DesignPatterns.Factory.SimpleFactory;

/**
 * 哈佛卡车
 * @auther jinsx
 * @date 2019-05-15 09:03
 */
public class HFTruck implements HFCar {
	@Override
	public void run() {
		System.out.println("哈佛小卡车，运输能力就是强");
	}
}
```
    - 1
    - 2
    - 3
    - 4
    - 5
    - 6
    - 7
    - 8
    - 9
    - 10
    - 11
    - 12
    - 13
  - 声明简单工厂，有一个返回Car对象的静态类
```
package com.jin.demo.DesignPatterns.Factory.SimpleFactory;

/**
 * 简单工厂
 * @auther jinsx
 * @date 2019-05-15 09:06
 */
public class CarSimpleFactory {
	// 需要使用定义好的参数获取产品对象，没增加产品都需要修改次工厂方法
	public static HFCar createHFCar(String type){
		HFCar car = null;
		switch (type){
			case "roadster" :
				car = new HFRoadster();
				break;
			case "truck" :
				car = new HFTruck();
				break;
		}
		return car;
	}
}
```
    - 1
    - 2
    - 3
    - 4
    - 5
    - 6
    - 7
    - 8
    - 9
    - 10
    - 11
    - 12
    - 13
    - 14
    - 15
    - 16
    - 17
    - 18
    - 19
    - 20
    - 21
    - 22
  - 测试类https://dribbble.com/sanaslatvmcb/collections/4201092
    https://dribbble.com/nesmaoxclul/collections/4201094
    https://dribbble.com/sanaslatvmcb/collections/4201098
    https://dribbble.com/nesmaoxclul/collections/4201100
    https://dribbble.com/sanaslatvmcb/collections/4201103
    https://dribbble.com/nesmaoxclul/collections/4201105
    https://dribbble.com/sanaslatvmcb/collections/4201109
    https://dribbble.com/nesmaoxclul/collections/4201110
    https://dribbble.com/nesmaoxclul/collections/4201115
    https://dribbble.com/sanaslatvmcb/collections/4201117
    https://dribbble.com/nesmaoxclul/collections/4201119
    https://dribbble.com/sanaslatvmcb/collections/4201120
    https://dribbble.com/sanaslatvmcb/collections/4201123
    https://dribbble.com/nesmaoxclul/collections/4201124
    https://dribbble.com/sanaslatvmcb/collections/4201128
    https://dribbble.com/nesmaoxclul/collections/4201130
    https://dribbble.com/sanaslatvmcb/collections/4201132
    https://dribbble.com/nesmaoxclul/collections/4201134
    https://dribbble.com/sanaslatvmcb/collections/4201136
    https://dribbble.com/nesmaoxclul/collections/4201138
    https://dribbble.com/sanaslatvmcb/collections/4201141
    https://dribbble.com/nesmaoxclul/collections/4201142
    https://dribbble.com/sanaslatvmcb/collections/4201144
    https://dribbble.com/nesmaoxclul/collections/4201145
    https://dribbble.com/sanaslatvmcb/collections/4201150
    https://dribbble.com/nesmaoxclul/collections/4201151
    https://dribbble.com/sanaslatvmcb/collections/4201154
    https://dribbble.com/nesmaoxclul/collections/4201155
    https://dribbble.com/sanaslatvmcb/collections/4201158
    https://dribbble.com/nesmaoxclul/collections/4201160
    https://dribbble.com/sanaslatvmcb/collections/4201164
    https://dribbble.com/nesmaoxclul/collections/4201165
    https://dribbble.com/sanaslatvmcb/collections/4201167
    https://dribbble.com/nesmaoxclul/collections/4201168
    https://dribbble.com/sanaslatvmcb/collections/4201171
    https://dribbble.com/nesmaoxclul/collections/4201174
    https://dribbble.com/sanaslatvmcb/collections/4201176
    https://dribbble.com/nesmaoxclul/collections/4201179
    https://dribbble.com/sanaslatvmcb/collections/4201183
    https://dribbble.com/nesmaoxclul/collections/4201184
    https://dribbble.com/ratheuapo/collections/4201189
    https://dribbble.com/nanoughhsdfb/collections/4201191
    https://dribbble.com/ratheuapo/collections/4201193
    https://dribbble.com/nanoughhsdfb/collections/4201197
    https://dribbble.com/ratheuapo/collections/4201200
    https://dribbble.com/nanoughhsdfb/collections/4201203
    https://dribbble.com/ratheuapo/collections/4201204
    https://dribbble.com/nanoughhsdfb/collections/4201207
    https://dribbble.com/ratheuapo/collections/4201209
    https://dribbble.com/nanoughhsdfb/collections/4201211
    https://dribbble.com/ratheuapo/collections/4201213
    https://dribbble.com/nanoughhsdfb/collections/4201216
    https://dribbble.com/ratheuapo/collections/4201218
    https://dribbble.com/nanoughhsdfb/collections/4201220
    https://dribbble.com/ratheuapo/collections/4201221
    https://dribbble.com/nanoughhsdfb/collections/4201222
    https://dribbble.com/ratheuapo/collections/4201225
    https://dribbble.com/nanoughhsdfb/collections/4201228
    https://dribbble.com/ratheuapo/collections/4201230
    https://dribbble.com/nanoughhsdfb/collections/4201232
    https://dribbble.com/ratheuapo/collections/4201235
    https://dribbble.com/nanoughhsdfb/collections/4201237
    https://dribbble.com/ratheuapo/collections/4201239
    https://dribbble.com/nanoughhsdfb/collections/4201242
    https://dribbble.com/ratheuapo/collections/4201243
    https://dribbble.com/nanoughhsdfb/collections/4201247
    https://dribbble.com/ratheuapo/collections/4201250
    https://dribbble.com/nanoughhsdfb/collections/4201252
    https://dribbble.com/ratheuapo/collections/4201254
    https://dribbble.com/nanoughhsdfb/collections/4201257
    https://dribbble.com/ratheuapo/collections/4201258
    https://dribbble.com/nanoughhsdfb/collections/4201261
    https://dribbble.com/ratheuapo/collections/4201265
    https://dribbble.com/nanoughhsdfb/collections/4201267
    https://dribbble.com/ratheuapo/collections/4201271
    https://dribbble.com/nanoughhsdfb/collections/4201273
    https://dribbble.com/ratheuapo/collections/4201275
    https://dribbble.com/nanoughhsdfb/collections/4201278
    https://dribbble.com/ratheuapo/collections/4201282
    https://dribbble.com/nanoughhsdfb/collections/4201283
    https://dribbble.com/teteighprcjwh/collections/4201286
    https://dribbble.com/shirebvxpbn/collections/4201287
    https://dribbble.com/teteighprcjwh/collections/4201290
    https://dribbble.com/shirebvxpbn/collections/4201291
    https://dribbble.com/teteighprcjwh/collections/4201294
    https://dribbble.com/shirebvxpbn/collections/4201295
    https://dribbble.com/teteighprcjwh/collections/4201299
    https://dribbble.com/shirebvxpbn/collections/4201301
    https://dribbble.com/teteighprcjwh/collections/4201304
    https://dribbble.com/shirebvxpbn/collections/4201306
    https://dribbble.com/teteighprcjwh/collections/4201310
    https://dribbble.com/shirebvxpbn/collections/4201314
    https://dribbble.com/teteighprcjwh/collections/4201316
    https://dribbble.com/shirebvxpbn/collections/4201318
    https://dribbble.com/teteighprcjwh/collections/4201321
    https://dribbble.com/shirebvxpbn/collections/4201323
    https://dribbble.com/teteighprcjwh/collections/4201324
    https://dribbble.com/shirebvxpbn/collections/4201325
    https://dribbble.com/teteighprcjwh/collections/4201327
    https://dribbble.com/shirebvxpbn/collections/4201330
    https://dribbble.com/teteighprcjwh/collections/4201333
    https://dribbble.com/shirebvxpbn/collections/4201335
    https://dribbble.com/teteighprcjwh/collections/4201339
    https://dribbble.com/shirebvxpbn/collections/4201341
    https://dribbble.com/teteighprcjwh/collections/4201343
    https://dribbble.com/shirebvxpbn/collections/4201344
    https://dribbble.com/teteighprcjwh/collections/4201348
    https://dribbble.com/shirebvxpbn/collections/4201349
    https://dribbble.com/teteighprcjwh/collections/4201352
    https://dribbble.com/shirebvxpbn/collections/4201354
    https://dribbble.com/teteighprcjwh/collections/4201356
    https://dribbble.com/shirebvxpbn/collections/4201357
    https://dribbble.com/teteighprcjwh/collections/4201359
    https://dribbble.com/shirebvxpbn/collections/4201360
    https://dribbble.com/teteighprcjwh/collections/4201364
    https://dribbble.com/shirebvxpbn/collections/4201365
    https://dribbble.com/teteighprcjwh/collections/4201368
    https://dribbble.com/shirebvxpbn/collections/4201371
    https://dribbble.com/teteighprcjwh/collections/4201373
    https://dribbble.com/shirebvxpbn/collections/4201375
    https://dribbble.com/shisatmikv/collections/4201381
    https://dribbble.com/shisatmikv/collections/4201384
    https://dribbble.com/shisatmikv/collections/4201388
    https://dribbble.com/shisatmikv/collections/4201393
    https://dribbble.com/shisatmikv/collections/4201398
    https://dribbble.com/shisatmikv/collections/4201404
    https://dribbble.com/shisatmikv/collections/4201408
    https://dribbble.com/shisatmikv/collections/4201415
    https://dribbble.com/shisatmikv/collections/4201417
    https://dribbble.com/shisatmikv/collections/4201418
    https://dribbble.com/shisatmikv/collections/4201421
    https://dribbble.com/shisatmikv/collections/4201424
    https://dribbble.com/shisatmikv/collections/4201428
    https://dribbble.com/shisatmikv/collections/4201432
    https://dribbble.com/shisatmikv/collections/4201433
    https://dribbble.com/shisatmikv/collections/4201436
    https://dribbble.com/ceeteanbkcxeb/collections/4201438
    https://dribbble.com/shisatmikv/collections/4201439
    https://dribbble.com/ceeteanbkcxeb/collections/4201443
    https://dribbble.com/shisatmikv/collections/4201444
    https://dribbble.com/ceeteanbkcxeb/collections/4201446
    https://dribbble.com/shisatmikv/collections/4201447
    https://dribbble.com/ceeteanbkcxeb/collections/4201448
    https://dribbble.com/ceeteanbkcxeb/collections/4201451
    https://dribbble.com/ceeteanbkcxeb/collections/4201454
    https://dribbble.com/ceeteanbkcxeb/collections/4201457
```
package com.jin.demo.DesignPatterns.Factory.SimpleFactory;

/**
 * 测试类
 * @auther jinsx
 * @date 2019-05-15 09:15
 */
public class TestSimpleFactory {
	public static void main(String[] args) {
		// 来一个哈佛小跑
		HFCar roadster = CarSimpleFactory.createHFCar("roadster");
		roadster.run();
		// 来一个哈佛小卡
		HFCar truck = CarSimpleFactory.createHFCar("truck");
		truck.run();
	}
}
```
    - 1
    - 2
    - 3
    - 4
    - 5
    - 6
    - 7
    - 8
    - 9
    - 10
    - 11
    - 12
    - 13
    - 14
    - 15
    - 16
    - 17

标签：Java,ratheuapo,工厂,teteighprcjwh,collections,https,dribbble,设计模式,com
来源： https://blog.csdn.net/zhao_963084302/article/details/111602954

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。

ICode9

Java设计模式之简单工厂模式

Java设计模式之简单工厂模式