【转载】Servlet过滤器的实例
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?下面是用于设定表单传输参数编码的过滤器CharacterEncodingFilter.java

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<filter>??????????<filter-name>char</filter-name>??????????<filter-class>servlet.CharFilter</filter-class>??????????<init-param>??????????????<param-name>charset</param-name>??????????????<param-value>gbk</param-value>??????????</init-param>??????????<init-param>??????????????<param-name>it</param-name>??????????????<param-value>hope</param-value>??????????</init-param>??????</filter>??????<filter-mapping>??????????<filter-name>char</filter-name>??????????<url-pattern>/*</url-pattern>??????</filter-mapping>??