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Question

写个过滤类吧，继承filter接口。在web。xml里配一下；
<filter>
    <filter-name>Set Character Encoding</filter-name>
    <filter-class>org.apache.webapp.admin.filters.SetCharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF8</param-value>
    </init-param>
  </filter>
<filter-mapping>
    <filter-name>Set Character Encoding</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
SetCharacterEncodingFilter类是过滤类