Spring中加載 ApplicationContext.xml檔案的方式

1.利用ClassPathXmlApplicationContext

可以從 classpath中讀取XML檔案

(1)

ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); UserDao userDao = (UserDao)context.getBean("userDao");

 (2)

ClassPathXmlApplicationContext resource = new ClassPathXmlApplicationContext(new String[]{"applicationContext-ibatis-oracle.xml","applicationContext.xml","applicationContext-data-oracle.xml"}); BeanFactory factory = resource; UserDao userDao = (UserDao) factory.getBean("userDao");

2. 利用ClassPathResource

可以從 classpath中讀取XML檔案

Resource cr = new ClassPathResource("applicationContext.xml"); BeanFactory bf=new XmlBeanFactory(cr); UserDao userDao = (UserDao)bf.getBean("userDao");

 加載一個 xml檔案 org.springframework.beans.factory.config.PropertyPlaceholderConfigurer不起作用

3．利用XmlWebApplicationContext讀取

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

4.利用FileSystemResource讀取

Resource rs = new FileSystemResource("D:/tomcat/webapps/test/WEB-INF/classes/ applicationContext.xml"); BeanFactory factory = new XmlBeanFactory(rs); UserDao userDao = (UserDao )factory.getBean("userDao");

值得注意的是：利用FileSystemResource，則配置檔案必須放在project直接目錄下，或者寫明絕對路徑，否則就會抛出找不到檔案的異常

5．利用FileSystemXmlApplicationContext讀取

可以指定XML 定義檔案的相對路徑或者絕對路徑來讀取定義檔案。

方法一：

String[] path={"WebRoot/WEB-INF/applicationContext.xml","WebRoot/WEB-INF/applicationContext_task.xml"}; ApplicationContext context = new FileSystemXmlApplicationContext(path);

方法二：

String path="WebRoot/WEB-INF/applicationContext*.xml"; ApplicationContext context = new FileSystemXmlApplicationContext(path);

方法三：

ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:位址");

沒有classpath的話就是從目前的工作目錄