web.xml

web项目启动时,

容器(Tomcat)加载web.xml

加载顺序

<context-param>

由于ContextLoaderListener加载时,会查找名为contextConfigLocation的参数.

因此,配置context-param时参数名字应该是contextConfigLocation.

所以context-param参数的名字是固定的contextConfigLocation.

<listener>

<filter>

<servlet>

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring-config.xml</param-value>
</context-param>

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

    <!-- Spring字符集过滤器 -->
    <filter>
        <filter-name>characterEncoding</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!-- 设置request所指定字符集 -->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <!-- 设置response所指定字符集 -->
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <!-- filter过滤规则 -->
    <filter-mapping>
        <filter-name>characterEncoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <servlet>
        <servlet-name>dispactherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring-mvc.xml</param-value>
        </init-param>

        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>