在web.xml配置过滤器：  

 

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<!-- 过滤器 过滤乱码 -->
     < filter >
         < filter-name >characterEncodingFilter</ 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 >characterEncodingFilter</ filter-name >
         < url-pattern >/*</ url-pattern >
       </ filter-mapping >