Spring读取配置文件的几种方式

 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileReader;
 import java.io.IOException;
 import java.io.Reader;
 import java.util.Properties;

 import org.junit.Test;
 import org.springframework.core.io.ClassPathResource;
 import org.springframework.core.io.FileSystemResource;
 import org.springframework.core.io.Resource;

 /**
  * BeanFactory只有依赖注入功能没有AOP功能, ApplicationContext继承自BeanFactory有AOP功能
  */
 public class GetBeanFactory {
     /**
      * 加载项目内的配置文件，读取classPath之下的文件
      */
     public void test01() {
         Resource resource = new ClassPathResource("applicationContext.xml");
         BeanFactory bf = new XmlBeanFactory(resource);
         StudentAction studentService = (StudentAction) bf
                 .getBean("StudentAction");
         System.out.println(studentService);
     }

     /**
      * 加载项目外的配置文件,File读取C盘下的文件
      */
     public void test02() {
         Resource resource = new FileSystemResource("C:/applicationContext.xml");
         BeanFactory beanFactory = new XmlBeanFactory(resource);
         StudentAction studentAction = (StudentAction) beanFactory
                 .getBean("studentAction");
         System.out.println(studentAction);
     }

     /**
      * 读取Tomcat中的application配置文件, 必须导入Spring3-Web.jar包
      */
     public void test03() {
         /*
          * 将下面的代码必须放到jsp页面里面执行 <% org.springframework.core.io.Resource
          * resource=null; org.springframework.beans.factory.BeanFactory
          * beanFactory=null; resource=new
          * org.springframework.web.context.support
          * .ServletContextResource(application
          * ,"/WEB-INF/classes/applicationContext.xml"); beanFactory=new
          * org.springframework.beans.factory.xml.XmlBeanFactory(resource);
          * System.out.println(beanFactory); %>
          */
     }

     /**
      * ApplicationContext继承自BeanFactory有AOP功能
      */
     public void test04() {
         ApplicationContext context = new ClassPathXmlApplicationContext(
                 "applicationContext.xml");
         StudentService studentService = (StudentService) context
                 .getBean("studentService");
         studentService.save(new Student("test", 22));
     }

     /**
      * ApplicationContext继承自BeanFactory有AOP功能
      */
     public void test05() {
         ApplicationContext context = new FileSystemXmlApplicationContext(
                 "C:/applicationContext.xml");
         System.out.println(context.getBeanDefinitionCount());// 定义bean的总数
     }
     /**
      * ApplicationContext继承自BeanFactory有AOP功能
      */
     public void test06() {
         String[] filepath = { "applicationContext.xml" };
         ApplicationContext factory = new ClassPathXmlApplicationContext(
                 filepath);
         StudentService studentService = (StudentService) factory
                 .getBean("studentService");
     }
     /**
      * 用Spring读取properties文件
      */
     @Test
     public void test07() throws Exception, Exception {
         Resource r = new ClassPathResource("ssh.properties");
         Properties p=new Properties();
         p.load(new FileInputStream(r.getFile()));
         System.out.println(p.get("studentDao"));
     }

     @Test
     public void test08() throws Exception, Exception {
         Resource r = new ClassPathResource("a.txt");
     }

 }