Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly
Sign up
Appearance settings

Commit c59cfcf

Browse files
committed
享元模式
1 parent 240520f commit c59cfcf

File tree

6 files changed

+129
-0
lines changed

6 files changed

+129
-0
lines changed
Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
1+
package com.anxpp.designpattern.flyweight;
2+
//享元接口
3+
public interface IWeather {
4+
void printWeather();
5+
}
Lines changed: 48 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,48 @@
1+
package com.anxpp.designpattern.flyweight;
2+
import java.util.HashMap;
3+
//简单的享元模式
4+
public class SimpleFlyweight {
5+
public static void main(String args[]){
6+
FlyweightFactory factory = new FlyweightFactory();
7+
IFlyweight flyweight1,flyweight2,flyweight3,flyweight4;
8+
flyweight1 = factory.getFlyweight("value1");
9+
flyweight2 = factory.getFlyweight("value1");
10+
flyweight3 = factory.getFlyweight("value1");
11+
flyweight4 = factory.getFlyweight("value2");
12+
flyweight1.doSomething();
13+
flyweight2.doSomething();
14+
flyweight3.doSomething();
15+
flyweight4.doSomething();
16+
System.out.println(factory.size());
17+
}
18+
}
19+
//享元接口
20+
interface IFlyweight{
21+
void doSomething();
22+
}
23+
//具体享元
24+
class Flyweight implements IFlyweight{
25+
private String value;
26+
public Flyweight(String value){
27+
this.value = value;
28+
}
29+
@Override
30+
public void doSomething() {
31+
System.out.println(value);
32+
}
33+
}
34+
//享元工厂
35+
class FlyweightFactory{
36+
HashMap<String, IFlyweight> flyweights = new HashMap<String, IFlyweight>();
37+
IFlyweight getFlyweight(String value){
38+
IFlyweight flyweight = flyweights.get(value);
39+
if(flyweight == null){
40+
flyweight = new Flyweight(value);
41+
flyweights.put(value, flyweight);
42+
}
43+
return flyweight;
44+
}
45+
public int size(){
46+
return flyweights.size();
47+
}
48+
}
Lines changed: 24 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,24 @@
1+
package com.anxpp.designpattern.flyweight;
2+
public class TestUse {
3+
public static void main(String args[]){
4+
WeatherFactory factory = new WeatherFactory();
5+
IWeather weather1,weather2,weather3,weather4,weather5,weather6,weather7,weather8;
6+
weather1 = factory.getFlyWeight("多云",15);
7+
weather2 = factory.getFlyWeight("晴",23);
8+
weather3 = factory.getFlyWeight("多云",16);
9+
weather4 = factory.getFlyWeight("阴",10);
10+
weather5 = factory.getFlyWeight("多云",15);
11+
weather6 = factory.getFlyWeight("多云",15);
12+
weather7 = factory.getFlyWeight("多云",15);
13+
weather8 = factory.getFlyWeight("多云",15);
14+
weather1.printWeather();
15+
weather2.printWeather();
16+
weather3.printWeather();
17+
weather4.printWeather();
18+
weather5.printWeather();
19+
weather6.printWeather();
20+
weather7.printWeather();
21+
weather8.printWeather();
22+
System.out.println("实际对象个数" + factory.getFlyweightSize());
23+
}
24+
}
Lines changed: 24 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,24 @@
1+
package com.anxpp.designpattern.flyweight;
2+
//具体享元
3+
public class Weather implements IWeather{
4+
private String weather;
5+
private Integer temperature;
6+
public Weather(String weather,int temperature){
7+
this.weather = weather;
8+
this.temperature = temperature;
9+
}
10+
@Override
11+
public void printWeather() {
12+
System.out.print("天气:" + weather);
13+
System.out.println(" 温度:" + temperature);
14+
}
15+
@Override
16+
public boolean equals(Object obj) {
17+
Weather weather = (Weather)obj;
18+
return weather.weather.equals(this.weather)&&weather.temperature==temperature;
19+
}
20+
@Override
21+
public int hashCode() {
22+
return (weather.hashCode()+temperature.hashCode())/2;
23+
}
24+
}
Lines changed: 23 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,23 @@
1+
package com.anxpp.designpattern.flyweight;
2+
3+
import java.util.HashMap;
4+
//享元工厂
5+
public class WeatherFactory {
6+
private HashMap<IWeather, IWeather> weathers;
7+
public WeatherFactory(){
8+
weathers = new HashMap<IWeather, IWeather>();
9+
}
10+
public IWeather getFlyWeight(String weather,int temperature){
11+
Weather objectWeather = new Weather(weather, temperature);
12+
IWeather flyweight = weathers.get(objectWeather);
13+
if(flyweight == null){
14+
flyweight = objectWeather;
15+
weathers.put(objectWeather, flyweight);
16+
}
17+
else objectWeather = null;//方便gc回收
18+
return flyweight;
19+
}
20+
public int getFlyweightSize(){
21+
return weathers.size();
22+
}
23+
}
Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,5 @@
1+
/**
2+
* @author Administrator
3+
* 享元模式
4+
*/
5+
package com.anxpp.designpattern.flyweight;

0 commit comments

Comments
(0)

AltStyle によって変換されたページ (->オリジナル) /