applicationContext.xml 配置的两种方法

Spring 项目中 applicationContext.xml 配置有两种方法。两种不能同时配置，不然会文件内配置的bean会被初始化2次

参考: https://www.cnblogs.com/caryfang/p/5675178.html

 第一种全局配置 

  <context-param>

       <param-name>contextConfigLocation</param-name>

       <param-value>classpath:spring/applicationContext*.xml</param-value>

    </context-param>

    <listener>

       <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

    </listener>

  第二种在DispatcherServlet中已参数的形式配置

   <servlet>

       <servlet-name>springmvc-web</servlet-name>

       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

       <init-param>

           <param-name>contextConfigLocation</param-name>

           <param-value>classpath:spring/springmvc.xml</param-value>

       </init-param>

    </servlet>

    <servlet-mapping>

       <servlet-name>springmvc-web</servlet-name>

       <url-pattern>*.action</url-pattern>

    </servlet-mapping>