Spring中加载ApplicationContext.xml文件的方式

来源：互联网发布：软件测试时间安排编辑：程序博客网时间：2024/04/30 00:06

一、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[]
    {"applicationContext-ibatis-oracle.xml","applicationContext.xml","applicationContext-data-oracle.xml"});
    BeanFactory factory = resource; UserDao userDao = (UserDao) factory.getBean("userDao");

二、利用ClassPathResource,可以从classpath中读取XML文件

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

三、利用XmlWebApplicationContext读取

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

四、利用FileSystemResource读取

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

五、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_task.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");

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