求struts里.用SERVLET取得WEB.XML内的内容.

这是一个filter取参数的例子，你看看：
web.xml:<filter>
    <filter-name>Set Character Encoding</filter-name>
    <filter-class>com.huahang.tj.struts.filters.SetCharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>GB2312</param-value>
    </init-param>
    <init-param>
      <param-name>ignore</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>Set Character Encoding</filter-name>
    <servlet-name>action</servlet-name>
  </filter-mapping>
servlet一段代码:
public void init(FilterConfig filterConfig) throws ServletException {    this.filterConfig = filterConfig;
        this.encoding = filterConfig.getInitParameter("encoding");
        String value = filterConfig.getInitParameter("ignore");
        if (value == null)
            this.ignore = true;
        else if (value.equalsIgnoreCase("true"))
            this.ignore = true;
        else if (value.equalsIgnoreCase("yes"))
            this.ignore = true;
        else
            this.ignore = false;    }