Spring学习系列之ApplicationContext入门(2)

简介:

有人把BeanFactory比作是Spring的心脏,ApplicationContext则是Spring的完整身躯.ApplicationContext接口继承了BeanFactory接口.

ApplicationContext接口的主要实现类有ClassPathXmlApplicationContext和FileSystemXmlApplicationContext.最基本的用法如下:

package com.james.beanfactory;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

public class ApplicationCtxTest {

	public static void main(String[] args) {
		ApplicationContext ctx1 = new ClassPathXmlApplicationContext("com/james/beanfactory/beans.xml");	
//		ApplicationContext ctx1 = new FileSystemXmlApplicationContext("src/com/james/beanfactory/beans.xml");
		
		Bike myBike = ctx1.getBean("bike", Bike.class);
		myBike.display();
		
		// A Rider contains a Bike, The dependancy is set in xml. 
		Rider r = ctx1.getBean("rider", Rider.class);
		r.rideTo("Tibet");
	}

此外,还可以这样使用它们:

1. 在资源前使用classpath: file:这样的前缀
2. 传递String数字,一次加载多个资源
3. 使用通配符(*,?等)一次加载多个资源