02-springmvc-crud错误（添加出现中文乱码）

<!-- 处理中文乱码的过滤器 -->
 <filter>
     <filter-name>CharacterEncodingFilter</filter-name>
     <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
     <init-param>
         <!-- 配置请求进来的字符集 -->
         <param-name>encoding</param-name>
         <param-value>UTF-8</param-value>
     </init-param>
     <init-param>
         <!-- 响应字符集 -->
         <param-name>forceEncoding</param-name>
         <param-value>true</param-value>
     </init-param>
 </filter>
 <filter-mapping>
     <filter-name>CharacterEncodingFilter</filter-name>
     <url-pattern>/*</url-pattern>
 </filter-mapping>