1、applicationContext.xml和dispatcher-servlet.xml
applicationContext.xml是随ContextLoaderListener的加载而执行的,
<!-- Spring -->
<!-- 配置Spring配置文件路径 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:applicationContext.xml
</param-value>
</context-param>
<!-- 配置Spring上下文监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring -->
而xxx-servlet.xml是随DispatcherServlet的加载而执行的,
<!-- Spring MVC 核心控制器 DispatcherServlet 配置 -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<!-- 拦截所有/rest/* 的请求,交给DispatcherServlet处理,性能最好 -->
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
在web.xml中,加载顺序是listener>filter>servlet,所以applicationContext.xml先加载!
2、分成spring.xml(applicationContext.xml)、spring-mvc.xml(dispatcher-servlet.xml)、spring-mybatis.xml
首先ContextLoaderListener加载核心的spring.xml,以及数据源和事务管理等配置文件spring-batis.xml
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
然后DispatcherServlet加载spring-mvc.xml
<servlet>
<description>spring-mvc</description>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:spring-mvc.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>