1、web.xml加上下面的试试
<!--中文乱码处理过滤-->
<filter>
<filter-name>encodingFilter</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>encodingFilter</filter-name>
<url-pattern>/</url-pattern>
</filter-mapping>
<!--中文乱码处理过滤 -->
2、jsp页面设置的编码跟web.xml一致，即UTF-8
<%@ page contentType="text/html;charset=UTF-8" language="java" %>