JAEE中的Filter实现
EncodingFilter.java

\WEB-INF\web.xml
        <!-- 文件编码过滤器 --><filter><filter-name>encodingFilter</filter-name><filter-class>com.zdx.filters.EncodingFilter</filter-class><init-param><param-name>code</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping>