转载：【JAVA】加载Spring中的ApplicationContext.xml文件的方式

<1>、利用ClassPathXmlApplicationContext,可以从classpath中读取XML文件
1. //读取一个文件 

ApplicationContext context= new ClassPathXmlApplicationContext("applicationContext.xml");   
UserDAO userDAO= (UserDAO )context.getBean("userDAO");   

2.//读取多个文件 

ClassPathXmlApplicationContext resource= new ClassPathXmlApplicationContext(new String[]  
{"applicationContextconfig.xml","applicationContext.xml","applicationContext-data.xml"});   
BeanFactory factory= resource;  
UserDAO userDAO= (UserDAO ) factory.getBean("userDAO ");   

<2>、利用ClassPathResource,可以从classpath中读取XML文件 

Resource resource= new ClassPathResource("applicationContext.xml");   
BeanFactory bf=new XmlBeanFactory(resource );   
UserDAO userDAO= (UserDAO )bf.getBean("userDAO ");  

 
<3>、利用XmlWebApplicationContext读取 

XmlWebApplicationContext xmlctx = new XmlWebApplicationContext();   
xmlctx.setConfigLocations(new String[] {"/WEB-INF/ applicationContext.xml");   
xmlctx.setServletContext(pageContext.getServletContext());   
xmlctx.refresh();  
 UserDAO userDAO= (UserDAO ) xmlctx.getBean("userDAO ");   

<4>、利用FileSystemResource读取 

Resource resource= new FileSystemResource("E:/Java/spring/WebRoot/WEB-INF/classes/ applicationContext.xml");   
BeanFactory factory= new XmlBeanFactory(resource );  
 UserDAO userDAO= (UserDAO )factory.getBean("userDAO ");

   
   注意:利用FileSystemResource，则配置文件必须放在project直接目录下，或者写明绝对路径，否则就会抛出找不到文件的异常 
<5>、利用FileSystemXmlApplicationContext读取,可以指定XML定义文件的相对路径或者绝对路径来读取定义文件。 

String[] path={"WebRoot/WEB-INF/applicationContext.xml","WebRoot/WEB-INF/applicationContext_config.xml"};   
ApplicationContext context = new FileSystemXmlApplicationContext(path);
String path="WebRoot/WEB-INF/applicationContext*.xml";   
ApplicationContext context = new FileSystemXmlApplicationContext(path);ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:地址");