factory.java

用实例描述了factory设计模式。 并且该实例都已编译通过

/*
 * Created on 2006-11-13
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package cn.edu.hunnu.factory;

import java.util.Properties;
import cn.edu.hunnu.product.Product;

/**
 * @author spring
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class Factory {

	public Product create() {
		return new Product();
	}

	public static Factory findFactorytoCreate(String a) throws Exception {
		String classname = null;
		Properties properties = Config.getP();

		classname = properties.getProperty(a);
		if (classname != null) {
			Factory factory = null;
			try {
				factory = (Factory) Class.forName(classname).newInstance();
			} catch (ClassNotFoundException e) {
				throw new Exception("Problem parsing the file: "
						+ e.getMessage());
			}
			return factory;
		} else {
			throw new Exception("no factory produce the product :" + a);
		}

	}

}