factory1.java

郭克华j2ee高级框架实战教学视频源代码 这个是比较值得一看的 由郭克华博士在总结多年Java培训的基础上

package factory;

//1:面向接口编程
//2:建立工厂类
class Action{
	public void callDao(){
		//CustomerDao cdao = new CustomerDao();
		ICustomerDao cdao = (ICustomerDao)DaoFactory.getDao("Customer");
		cdao.login();
	}
}
class DaoFactory{
	public static Object getDao(String daoName){
		//if(daoName.equals("Customer")){
			//预先准备工作
			String className = ;//根据配置文件获取daoName对应的类名,如果切换，改变配置文件中对应的类名就可以了
			return Class.forName(className).newInstance();
		//}
		//else if(/*...*/){	}		
		//return null;
	}
}//－－－－－－－－－－－－－－>配置文件		Spring
interface ICustomerDao{
	public abstract void login();
}

class CustomerDao implements ICustomerDao{
	public void login(){
		System.out.println("Dao 登陆");
	}
}


public class Factory1 {


	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

}