springMVC在Controller中获取WebApplicationContext

1、applicationContext

在web.xml中使用listener配置

<context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

 

使用WebApplicationContext获取

WebApplicationContext webApplicationContext =ContextLoader.getCurrentWebApplicationContext();  

 

2、springMVC-serlvet

在web.xml中使用servlet配置

<servlet>
  <servlet-name>springMVC</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:springMVC-servlet.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
  <servlet-name>springMVC</servlet-name>
  <url-pattern>/</url-pattern>
</servlet-mapping>

 

使用ServletContext获取

ServletContext servletContext=request.getSession().getServletContext();
WebApplicationContext webApplicationContext = (WebApplicationContext)servletContext.getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);