在MVC中配置编码filter可以解决中文乱码问题
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在web.xml中加入如下filter代码：
<!--Form content submit encoding filter start-->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<display-name>Character Encoding Filter</display-name>
<description>no description</description>
<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>
<!--Form content submit encoding filter end-->
<!-- Encoding Filter Mapping Start-->
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Encoding Filter Mapping End-->
