Java类中加载Spring中的ApplicationContext.xml文件的方式
<1>、利用ClassPathXmlApplicationContext,可以从classpath中读取XML文件//读取一个文件 1. ApplicationContext context= new ClassPathXmlApplicationContext("applicationContext.xml"); UserDAO userDAO= (UserDAO )context.getBean("userDAO"); //读取多个文件 2.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。1.String[] path={"WebRoot/WEB-INF/applicationContext.xml","WebRoot/WEB-INF/applicationContext_config.xml"}; ApplicationContext context = new FileSystemXmlApplicationContext(path);2. String path="WebRoot/WEB-INF/applicationContext*.xml"; ApplicationContext context = new FileSystemXmlApplicationContext(path); 3.ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:地址");