factory.java

jsp入门级代码

package cn.register;
import cn.register.product.Product;
import cn.register.product.SqlProduct;
import cn.register.user.SqlUser;
import cn.register.user.User;

public abstract class Factory {
	private static Factory factory = null;
	public Factory(){}
	public static Factory getInstance(){
		if(factory == null){
			try{
				Class factoryClass = Class.forName("cn.register.SqlFactory");
				factory = (Factory)factoryClass.newInstance();
			}catch(Exception e){
				e.printStackTrace();
			}
		}
		return factory;
	}
	public abstract User initUser();
	public abstract SqlUser initSqlUser();
	public abstract Product initProduct();
	public abstract SqlProduct initSqlProduct();
}