配置CharacterEncodingFilter过滤器，你可以强制将请求或者相应设置成utf-8，规避乱码的风险。
<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>
参考：
Spring MVC过滤器-字符集过滤器（CharacterEncodingFilter）
详解Spring中的CharacterEncodingFilter
web.xml/servlet过滤器之引入CharacterEncodingFilter
原文：http://my.oschina.net/cjun/blog/521481