java过滤器不起作用，请帮忙指导谢谢

[Geforce6600]

源代码（过滤时候登陆登陆）

package com.nl.utils;
public class LoginFilter implements Filter {
public void destroy() {
}

public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
// TODO Auto-generated method stub
HttpServletRequest httpReq = (HttpServletRequest)arg0;
SessionData sessionData = (SessionData)(httpReq.getSession().getAttribute(MgrConst.SESSION_KEY));
if(sessionData == null){
RequestDispatcher rd = httpReq.getSession().getServletContext().getRequestDispatcher("/home.do");
rd.forward(arg0, arg1);
}
arg2.doFilter(arg0, arg1);
}

public void init(FilterConfig arg0) throws ServletException {
System.out.println("进来了。。。");
}
}

xml配置
<filter>
<filter-name>loginFilter</filter-name>
<filter-class>com.nl.utils.LoginFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>loginFilter</filter-name>
<servlet-name>*.do</servlet-name>
</filter-mapping>

该配置放在了xml文件顶端位置

调试发现每次都不走过滤器代码

请大家指导下，谢谢

[Geforce6600]

无语 真是眼大无珠 连url-pattern都没看见，看来拷贝也要仔细啊

谢谢大家帮忙

[小笨熊]

servlet-name>*.do</servlet-name>
换成
<url-pattern>/*</url-pattern>

[小笨熊]

lz还是去看看filter的配置。。。估计你对配置不了解

[乌鸦不会飞]

把
<servlet-name>*.do</servlet-name>
换成
<url-pattern>*.do</url-pattern>

过滤.do结尾的url

[完美灬缺陷]

<filter-mapping>
<filter-name>loginFilter</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping>