web應用怎么跳過某些Filter

在做的項目需要用到cas，而使用cas的話，需要在client的webapp的web.xml中配置好多個filter，但是需要兼容到老的邏輯，如果滿足某些條件，就不走cas的filter，滿足另外一些條件，只走cas的其中幾個filter，那該怎么進行filter的相關配置呢？

從網上搜到了一片blog：http://blog.csdn.net/tandaly/article/details/8687671，里面講述了兩種方式。

第一種是給filter設置標識。我目前考慮，在自己項目中采取這種為filter加標識的方式：

publicclass FirstFilter implementsFilter {  
    //...  
   
    publicvoid doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)throwsIOException, ServletException {  
        servletRequest.setAttribute("executeSecondFilter",true);  
        //...  
        if(someReason)  
            servletRequest.setAttribute("executeSecondFilter",false); 
　　　　　　　servletRequest.setAttribute("executeThirdFilter",false);
　　　　　　　servletRequest.setAttribute("executeForthFilter",true); 
        filterChain.doFilter(servletRequest, servletResponse);  
    }  
}  
   
publicclass SecondFilter implementsFilter {  
    //..  
   
    publicvoid doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)throwsIOException, ServletException {  
        if(servletRequest.getAttribute("executeSecondFilter") == null|| !((Boolean) servletRequest.getAttribute("executeSecondFilter"))) {  
            filterChain.doFilter(servletRequest, servletResponse);  
        }  
        //...  
    }  
}  

publicclass ThirdFilter implementsFilter {  
    //..  
 publicvoid doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)throwsIOException, ServletException { if(servletRequest.getAttribute("executeThirdFilter") == null|| !((Boolean) servletRequest.getAttribute("executeThirdFilter"))) { filterChain.doFilter(servletRequest, servletResponse); } //...  } }

filterChain.doFilter（）的作用是跳轉到filter鏈的下一個filter。