在web.xml中配置spring同时设置字符编码过滤器

<filter>   <filter-name>SetCharacterEncoding</filter-name>   <filter-class>    org.springframework.web.filter.CharacterEncodingFilter   </filter-class>   <init-param>    <param-name>encoding</param-name>    <param-value>UTF-8</param-value>   </init-param>   <init-param>    <param-name>forceEncoding</param-name>    <param-value>true</param-value>   </init-param></filter><filter-mapping>   <filter-name>SetCharacterEncoding</filter-name>   <url-pattern>/*</url-pattern></filter-mapping><!-- 指定spring配置文件位置 --><context-param>   <param-name>contextConfigLocation</param-name>   <param-value>    <!--加载多个spring配置文件 -->    /WEB-INF/applicationContext.xml, /WEB-INF/action-servlet.xml   </param-value></context-param><!-- 定义SPRING监听器，加载spring。--> <p><listener>   <listener-class>    org.springframework.web.context.ContextLoaderListener   </listener-class></listener><listener>   <listener-class>    org.springframework.web.context.request.RequestContextListener   </listener-class></listener></p><p> </p>

<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee "
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance "
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd ">

监听器首先检查contextConfigLocation 参数，如果它不存在，它将使用/WEB-INF/applicationContext.xml 作为默认值。

ContextLoaderServlet 同ContextLoaderListener 一样使用contextConfigLocation 参数。