<filter>
  <filter-name>loggerfilter</filter-name>
  <filter-class>myfilter.LoggerFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <url-pattern>/*</url-pattern> //访问当前主机，当前应用程序根下的所有文件包括多级子目录下的所有文件，注意这里*前有“/”
</filter-mapping>

<filter>
  <filter-name>loggerfilter</filter-name>
  <filter-class>myfilter.LoggerFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <url-pattern>*.html</url-pattern> //访问当前主机，当前应用程序根目录下的所有html文件，注意：*.html前没有“/”,否则错误
</filter-mapping>

<filter>
  <filter-name>loggerfilter</filter-name>
  <filter-class>myfilter.LoggerFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <url-pattern>*.html</url-pattern>
</filter-mapping>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <url-pattern>*.jsp</url-pattern>//访问当前主机，当前应用程序根目录以所有及子目录下的所有jsp文件
</filter-mapping>

<filter>
  <filter-name>loggerfilter</filter-name>
  <filter-class>myfilter.LoggerFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <url-pattern>*.html;*.jsp</url-pattern>
</filter-mapping>//*.html;*.jsp两类型之间用分号;间隔

<filter>
  <filter-name>loggerfilter</filter-name>
  <filter-class>myfilter.LoggerFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <url-pattern>/folder_name/*</url-pattern>//访问当前主机，当前应用程序根目录下的folder_name子目录（可是多级子目录）下所有文件
</filter-mapping>

<filter>
  <filter-name>loggerfilter</filter-name>
  <filter-class>myfilter.LoggerFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <servlet-name>loggerservlet</servlet-name>
</filter-mapping>
<servlet>
  <servlet-name>loggerservlet</servlet-name>
  <servlet-class>myfilter.LoggerServlet</servlet-class>
</servlet>

<filter>
  <filter-name>loggerfilter</filter-name>
  <filter-class>myfilter.LoggerFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <url-pattern>/simplefilter.html</url-pattern>
</filter-mapping>

<filter>
  <filter-name>loggerfilter</filter-name>
  <filter-class>myfilter.LoggerFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <url-pattern>/dir_name/*</url-pattern>
</filter-mapping>

//获得用户请求的uri
String uri = request.getRequestURI();
if(uri.contains(".jsp")||uri.contains(".html"))
System.out.println("开始过滤"+url);

<filter>
  <filter-name>loggerfilter</filter-name>
  <filter-class>myfilter.LoggerFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>loggerfilter</filter-name>
  <url-pattern>/dir_name/index.jsp</url-pattern>
</filter-mapping>

<filter>
  <filter-name>NoCache</filter-name>
  <filter-class>com.sys.common.Filters.ResponseHeaderFilter
    </filter-class>
  <init-param>
   <param-name>Cache-Control</param-name>
   <param-value>no-cache, must-revalidate</param-value>
  </init-param>
 </filter>

 <filter>
  <filter-name>CacheForWeek</filter-name>
  <filter-class>com.sys.common.Filters.ResponseHeaderFilter
    </filter-class>
  <init-param>
   <param-name>Cache-Control</param-name>
   <param-value>max-age=604800, public</param-value>
  </init-param>
 </filter>
<filter-mapping>
  <filter-name>CacheForWeek</filter-name>
  <url-pattern>/images/*</url-pattern>
 </filter-mapping>
 <filter-mapping>
  <filter-name>CacheForWeek</filter-name>
  <url-pattern>*.js</url-pattern>
 </filter-mapping>
 <filter-mapping>
  <filter-name>CacheForWeek</filter-name>
  <url-pattern>*.css</url-pattern>
 </filter-mapping>

public class ResponseHeaderFilter implements Filter {
  FilterConfig fc;
  public void doFilter(ServletRequest req, ServletResponse res,FilterChain chain) throws IOException, ServletException {
    HttpServletResponse response = (HttpServletResponse) res;
    for (Enumeration e = fc.getInitParameterNames(); e.hasMoreElements();) {
      String headerName = (String) e.nextElement();
      response.addHeader(headerName, fc.getInitParameter(headerName));
    }
    chain.doFilter(req, response);
  }

  public void init(FilterConfig filterConfig) {
    this.fc = filterConfig;
  }

  public void destroy() {
    this.fc = null;
  }

}