springmvc 的登录拦截

package com.xiepanpan.ecps;

import com.xiepanpan.ecps.model.TsPtlUser;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * describe: 用户登录拦截器
 *
 * @author xiepanpan
 * @date 2018/11/15
 */
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        TsPtlUser user = (TsPtlUser) request.getSession().getAttribute("user");
        if (user==null) {
            String path = request.getContextPath();
            response.sendRedirect(path+"/user/toLogin.do");
            //拦截
            return false;
        }else {
            //放行
            return true;
        }
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
   http://www.springframework.org/schema/mvc
   http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-3.1.xsd
   http://www.springframework.org/schema/aop
   http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
   http://www.springframework.org/schema/tx
   http://www.springframework.org/schema/tx/spring-tx-3.0.xsd ">

    <context:component-scan base-package="com.xiepanpan.ecps.controller"/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/shop/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
  <!-- 拦截器拦截配置-->
    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/user/login/**"/>
            <bean class="com.xiepanpan.ecps.LoginInterceptor"></bean>
        </mvc:interceptor>
    </mvc:interceptors>
</beans>