nested exception is java.io.FileNotFoundException: class path resource [applicationContext.xml] cann

spring整合struts，在action里读取spring配置文件时，这么写：

ApplicationContext ctx=new
FileSystemXmlApplicationContext("WebContent/WEB-INF/config/spring/web-application-config.xml");

那么在触发action时会报错：

javax.servlet.ServletException: org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from file [D:\Program Files\apache-tomcat-6.0.26\bin\WebContent\WEB-INF\config\spring\web-application-config.xml]; nested exception is java.io.FileNotFoundException: WebContent\WEB-INF\config\spring\web-application-config.xml (The system cannot find the path specified)

如果改为：

ApplicationContext ctx=new
ClassPathXmlApplicationContext("WebContent/WEB-INF/config/spring/web-application-config.xml");

又会报错：

javax.servlet.ServletException: org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [WebContent/WEB-INF/config/spring/web-application-config.xml]; nested exception is java.io.FileNotFoundException: class path resource [WebContent/WEB-INF/config/spring/web-application-config.xml] cannot be opened because it does not exist

这是因为调用的是ClassPathXmlApplicationContext，而WebContent/WEB-INF/config/spring/web-application-config.xml并不在classespath路径中。

可见是加载ApplicationContext的方法有问题，那么，我们来查下加载spring配置文件有几种方法：

一：Spring中的几种容器都支持使用xml装配bean，包括：

XmlBeanFactory ，

ClassPathXmlApplicationContext ，

FileSystemXmlApplicationContext ，

XmlWebApplicationContext
加载这些容器的配置文件的xml有一下几种常见的方法：
1：引用资源用XmlBeanFactory（不能实现多个文件相互引用）
Resource resource = new ClassPathResource("appcontext.xml");

BeanFactory factory = new XmlBeanFactory(resource);
从factory中获取相应资源文件中的bean，但是这种bean读不到引用了其他文件中的bean！
2：引用应用上下文用ClassPathXmlApplicationContext
ApplicationContext factory=new ClassPathXmlApplicationContext("classpath:applicationContext.xml");

ApplicationContext factory=new ClassPathXmlApplicationContext("conf/userConfig.xml");
// src/conf 目录下的

ApplicationContext factory=new ClassPathXmlApplicationContext("file:G:/Test/src/appcontext.xml");

3：用文件系统的路径引用应用上下文用FileSystemXmlApplicationContext

ApplicationContext factory=new FileSystemXmlApplicationContext("src/applicationContext.xml");

ApplicationContext factory=new FileSystemXmlApplicationContext("classpath:appcontext.xml");

ApplicationContext factory=new FileSystemXmlApplicationContext("file:G:/Test/src/appcontext.xml");

ApplicationContext factory=new FileSystemXmlApplicationContext("G:/Test/src/appcontext.xml");
注意：在2、3的加载方式中可以加载多个配置文件，获取到ApplicationContext 对象中
String[] configs = {"applicationContext.xml","user_spring.xml"};

ApplicationContext ctx = new ClassPathXmlApplicationContext(configs);

//ApplicationContext ctx=new FileSystemXmlApplicationContext(configs);
AbstractDao myUserDAO =
(AbstractDao) ctx.getBean("userDao");
4：Web工程定制的加载方法 XmlWebApplicationContext
ServletContext servletContext = request.getSession().getServletContext();

ApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(servletContext );