public class MyIntercept implements HandlerInterceptor {

    @Override

    public void afterCompletion(HttpServletRequest arg0,

            HttpServletResponse arg1, Object arg2, Exception arg3)

            throws Exception {

        System.out.println("MyIntercept.afterCompletion()");

    }

    @Override

    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,

            Object arg2, ModelAndView arg3) throws Exception {

        System.out.println("MyIntercept.postHandle()");

    }

    @Override

    public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,

            Object arg2) throws Exception {

        System.out.println("MyIntercept.preHandle()");

        return true;

    }

}

<mvc:interceptors>

        <mvc:interceptor>

            <mvc:mapping path="/**" />

            <bean class="cn.cnsdhzzl.intercept.MyIntercept">

            </bean>

        </mvc:interceptor>

    </mvc:interceptors>

<mvc:exclude-mapping path="/user/login"/>

<mvc:interceptors>

        <bean class="com.elin4it.ssm.interceptor.DataInterceptor"/>

        <mvc:interceptor>

            <mvc:mapping path="/**"/>

            <mvc:exclude-mapping path="/user/login"/>

            <bean class="cn.xxx.xxx.interceptor.DataInterceptor"/>

        </mvc:interceptor>

    </mvc:interceptors>

<mvc:interceptors>

     <mvc:interceptor>

         <mvc:mapping path="/**"/>

         <bean class="cn.rhgk.yqfy.oa.intercept.LoginIntercept">

             <property name="exceptUrls">

                 <list>

                     <value>/login/auth</value>

                     <value>/login/exit</value>

                 </list>

             </property>

         </bean>

     </mvc:interceptor>

 </mvc:interceptors>

package cn.rhgk.yqfy.oa.intercept;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.commons.lang.StringUtils;

import org.springframework.web.servlet.HandlerInterceptor;

import org.springframework.web.servlet.ModelAndView;

import cn.rhgk.yqfy.oa.pojo.AppAdminLogin;

public class LoginIntercept implements HandlerInterceptor {

    private List<String> exceptUrls;

    public List<String> getExceptUrls() {

        return exceptUrls;

    }

    public void setExceptUrls(List<String> exceptUrls) {

        this.exceptUrls = exceptUrls;

    }

    @Override

    public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)

            throws Exception {

    }

    @Override

    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)

            throws Exception {

    }

    @Override

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)

            throws Exception {

        String requestUri = request.getRequestURI();

        if (requestUri.startsWith(request.getContextPath())) {

            requestUri = requestUri.substring(request.getContextPath().length(), requestUri.length());

        }

        // 系统根目录

        if (StringUtils.equals("/", requestUri)) {

            return true;

        }

        // 放行exceptUrls中配置的url

        for (String url : exceptUrls) {

            if (url.endsWith("/**")) {

                if (requestUri.startsWith(url.substring(0, url.length() - 3))) {

                    return true;

                }

            } else if (requestUri.startsWith(url)) {

                return true;

            }

        }

        HttpSession session = request.getSession();

        AppAdminLogin user = (AppAdminLogin) session.getAttribute("userInfo");

        if (null != user) {// 已登陆

            return true;

        } else {// 当前用户未登陆

            response.sendRedirect(request.getContextPath() + "/login/auth");

        }

        return false;

    }

}