package com.nyan.factory;
/*** client * @author Administrator**/
public class HairTest {public static void main(String[] args) {
//        HairInterface  left = new LeftHair();
//        left.drow();
//        HairInterface  right = new RightHair();
//        right.drow();
        HairFactory factory = new HairFactory();factory.getHair("left").drow();factory.getHairByClass("com.nyan.factory.RightHair").drow();factory.getHairByClassKey("left").drow();}}

package com.nyan.factory;import java.util.Map;/*** 发型工厂* @author Administrator**/
public class HairFactory {public HairInterface getHair(String key){if("left".equals(key)){return new LeftHair();}else if("right".equals(key)){return new RightHair();}return null;}/*** 利用反射，根据类名生成对象* @return*/public HairInterface getHairByClass(String className){try {HairInterface hair = (HairInterface)Class.forName(className).newInstance();return hair;} catch (InstantiationException | IllegalAccessException| ClassNotFoundException e) {e.printStackTrace();}return null;}public HairInterface getHairByClassKey(String key){try {Map<String, String> map =new PropertiesReader().getProperties();HairInterface hair = (HairInterface)Class.forName(map.get(key)).newInstance();return hair;} catch (InstantiationException | IllegalAccessException| ClassNotFoundException e) {e.printStackTrace();}return null;}
}

package com.nyan.factory;
/*** 发型接口* @author Administrator**/
public interface HairInterface {public void drow();
}

package com.nyan.factory;public class LeftHair implements HairInterface {@Overridepublic void drow() {System.out.println("---左分发型---");}}
RightHair、InHair。。。

right=com.nyan.factory.RightHair
left=com.nyan.factory.LeftHair

package com.nyan.factory;import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;public class PropertiesReader {public Map<String,String> getProperties(){Properties props = new Properties();Map<String,String> map = new HashMap<String, String>();InputStream in = getClass().getResourceAsStream("type.properties");try {props.load(in);Enumeration enumeration = props.propertyNames();while (enumeration.hasMoreElements()) {String key = (String) enumeration.nextElement();String value = props.getProperty(key);map.put(key, value);}return map;} catch (IOException e) {e.printStackTrace();}return null;}}