我正在尝试从访问日志中过滤掉任何image / css /
js请求。我创建了一个过滤器（LoggingFilter），并在server.xml中设置了conditionUnless属性，但由于缺少对image /
css / js文件的请求，因此我必须错过一个步骤。有人可以提示我我所缺少的吗？

这是代码-

LoggingFilter.java

public class LoggingFilter implements Filter 
{

@Override 
public void init(FilterConfig filterConfig) throws ServletException 
{

}

@Override 
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException 
{ 
    chain.doFilter(request, response); 
    if(response.getContentType() != null) 
    { 
        if (response.getContentType().contains("image") || 
                response.getContentType().contains("css") || 
                response.getContentType().contains("javascript")) 
        { 
            request.setAttribute("doNotLog", "noLog"); 
        } 
    } 
}

@Override 
public void destroy() 
{

} 
}

这是我在web.xml中的内容

<filter>
     <filter-name>LoggingFilter</filter-name>
     <filter-class>com.shop.famos.filters.LoggingFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>LoggingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

在tomcat设置中，我有-

<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs" prefix="localhost_access_log." suffix=".txt" conditionUnless="doNotLog" pattern="common"/>

顺便说一句，我正在使用tomcat 7