ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
RegisterDAO registerDAO = (RegisterDAO)ac.getBean("RegisterDAO");

如果是兩個(gè)以上:

ApplicationContext ac = new ClassPathXmlApplicationContext(new String[]{"applicationContext.xml","dao.xml"});

或者用通配符:

ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/*.xml");

二、ClassPathXmlApplicationContext

[只能讀放在web-info/classes目錄下的配置文件]和FileSystemXmlApplicationContext的區(qū)別

classpath:前綴是不需要的,默認(rèn)就是指項(xiàng)目的classpath路徑下面;

如果要使用絕對(duì)路徑,需要加上file:前綴表示這是絕對(duì)路徑;

對(duì)于FileSystemXmlApplicationContext:

默認(rèn)表示的是兩種：

1.沒有盤符的是項(xiàng)目工作路徑,即項(xiàng)目的根目錄;

2.有盤符表示的是文件絕對(duì)路徑.

如果要使用classpath路徑,需要前綴classpath:

public class HelloClient {
? protected static final Log log = LogFactory.getLog(HelloClient.class);
? public static void main(String[] args) {
? ? // Resource resource = new ClassPathResource("appcontext.xml");
? ? // BeanFactory factory = new XmlBeanFactory(resource);

? ? // 用classpath路徑
? ? // ApplicationContext factory = new ClassPathXmlApplicationContext("classpath:appcontext.xml");
? ? // ApplicationContext factory = new ClassPathXmlApplicationContext("appcontext.xml");

? ? // ClassPathXmlApplicationContext使用了file前綴是可以使用絕對(duì)路徑的
? ? // ApplicationContext factory = new ClassPathXmlApplicationContext("file:F:/workspace/example/src/appcontext.xml");

? ? // 用文件系統(tǒng)的路徑,默認(rèn)指項(xiàng)目的根路徑
? ? // ApplicationContext factory = new FileSystemXmlApplicationContext("src/appcontext.xml");
? ? // ApplicationContext factory = new FileSystemXmlApplicationContext("webRoot/WEB-INF/appcontext.xml");


? ? // 使用了classpath:前綴,這樣,FileSystemXmlApplicationContext也能夠讀取classpath下的相對(duì)路徑
? ? // ApplicationContext factory = new FileSystemXmlApplicationContext("classpath:appcontext.xml");
? ? // ApplicationContext factory = new FileSystemXmlApplicationContext("file:F:/workspace/example/src/appcontext.xml");

? ? // 不加file前綴
? ? ApplicationContext factory = new FileSystemXmlApplicationContext("F:/workspace/example/src/appcontext.xml");
? ? IHelloWorld hw = (IHelloWorld)factory.getBean("helloworldbean");
? ? log.info(hw.getContent("luoshifei"));
? }
}