<转>SPRING中加载XML配置文件的六种方式

pring中的几种容器都支持使用xml装配bean，包括： 
XmlBeanFactory，ClassPathXmlApplicationContext，FileSystemXmlApplicationContext，XmlWebApplicationContext

1. XmlBeanFactory 引用资源

Resource resource = new ClassPathResource("applicationContext-jms.xml");
BeanFactory factory = new XmlBeanFactory(resource);

2. ClassPathXmlApplicationContext 编译路径

// src
ApplicationContext factory = new ClassPathXmlApplicationContext("bean.xml");
ApplicationContext factory = new ClassPathXmlApplicationContext(new String[] {"bean1.xml", "bean2.xml"});
// src/conf
ApplicationContext factory = new ClassPathXmlApplicationContext("conf/bean.xml");
ApplicationContext factory = new ClassPathXmlApplicationContext("file:D:/Biubiu.Net/src/bean.xml"); 

3. 用文件系统的路径

ApplicationContext factory = new FileSystemXmlApplicationContext("src/appcontext.xml");
// 使用了classpath: 前缀作为标志; 这样FileSystemXmlApplicationContext也能够读入classpath下的相对路径
ApplicationContext factory = new FileSystemXmlApplicationContext("classpath:appcontext.xml");
ApplicationContext factory = new FileSystemXmlApplicationContext("file:D:/Biubiu.Net/src/bean.xml");
ApplicationContext factory = new FileSystemXmlApplicationContext("G:/Biubiu.Net/src/appcontext.xml"); 

4. XmlWebApplicationContext是专为Web工程定制的

ServletContext servletContext = request.getSession().getServletContext();
ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext); 

5. 使用BeanFactory

BeanDefinitionRegistry reg = new DefaultListableBeanFactory();
XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(reg);
reader.loadBeanDefinitions(new ClassPathResource("bean1.xml"));
reader.loadBeanDefinitions(new ClassPathResource("bean2.xml"));
BeanFactory beanFactory = (BeanFactory)reg;

6. Web 应用启动时加载多个配置文件

通过ContextLoaderListener也可加载多个配置文件，在web.xml文件中利用元素来指定多个配置文件位置，其配置如下:

<context-param>  
    <!-- Context Configuration locations for Spring XML files -->  
    <param-name>contextConfigLocation</param-name>  
    <param-value>  
        ./WEB-INF/**/Appserver-resources.xml,  
        classpath:config/aer/aerContext.xml,  
        classpath:org/codehaus/xfire/spring/xfire.xml,  
        ./WEB-INF/**/*.spring.xml  
    </param-value>  
</context-param>