一、大致结构
1、工厂类
2、抽象产品类
3、多个具体的产品类
二、代码
1、抽象产品类Fruit.java
package com.simplefactory;
public interface Fruit {
public void grow();
}
2、具体子类Apple.java和Orangle.java
package com.simplefactory;
public class Apple implements Fruit {
@Override
public void grow() {
System.out.println("我真在成长......");
}
}
package com.simplefactory;
public class Orangle implements Fruit {
@Override
public void grow() {
System.out.println("grow......");
}
}
3、将以上产品实现类放入配置文件
fruitList.properties
apple=com.simplefactory.Apple
orangle=com.simplefactory.Orangle
4、工具类
FruitList.java
package com.simplefactory;
import java.io.IOException;
import java.util.Properties;
public class FruitList {
private static Properties props;
static {
props = new Properties();
try {
//classpath加载文件需要/,如果你使用的是class Loader就不需要/
//props.load(FruitList.class.getClassLoader().getResourceAsStream("fruitList.properties"));
props.load(FruitList.class.getResourceAsStream("/fruitList.properties"));
} catch (IOException e) {
e.printStackTrace();
}
}
public static String getProperty(String name) {
return props.getProperty(name);
}
}
5、静态工厂类
SimpleFactory.java
package com.simplefactory;
public class SimpleFactory {
public static Fruit createFruit(String name) {
String className = FruitList.getProperty(name);
Fruit fruit = null;
try {
fruit = (Fruit) Class.forName(className).newInstance();
} catch (Exception e) {
e.printStackTrace();
}
return fruit;
}
}
6、测试类
Test.java
package com.simplefactory;
public class Test {
public static void main(String[] args) {
Fruit apple = SimpleFactory.createFruit("apple");
Fruit orangle = SimpleFactory.createFruit("orangle");
apple.grow();
orangle.grow();
}
}
7、测试结果
