實例化BeanFactory三種方法

package com.test.spring;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.core.io.Resource;
import org.springframework.beans.factory.xml.XmlBeanFactory;
public class BeanFactoryUsage {
    public static void main(String[] args){
        //從文件系統資源實例化BeanFactory

        //默認從當前的工程目錄下開始查找（工程目錄/com/test/文件目錄）
        org.springframework.core.io.Resource res = new org.springframework.core.io.FileSystemResource("com/test/bean.xml");
        org.springframework.beans.factory.BeanFactory factory = new org.springframework.beans.factory.xml.XmlBeanFactory(res);

        //從classpath下的資源實例化BeanFactory (Eclipse中的src/data目錄下)
        org.springframework.core.io.Resource  resClasspath = new org.springframework.core.io.ClassPathResource("data/bean2.xml");
        org.springframework.beans.factory.BeanFactory factory2 = new XmlBeanFactory(resClasspath);

        //使用ApplicationContext從classpath下的xml文件實例化BeanFacotory
        String classPath = "data/";
        org.springframework.context.ApplicationContext appContext = new org.springframework.context.support.ClassPathXmlApplicationContext(new String[]{classPath+"bean2.xml"});
        //直接生成類工廠的實例。
        org.springframework.beans.factory.BeanFactory factory3 = (BeanFactory)appContext;
    }
}