Springmvc实现登录拦截

以登录拦截为例如果不进行登录验证不能访问除登陆页面外的其他页面

登录拦截的class

package com.oa.global;

import org.springframework.web.servlet.HandlerInterceptor;s
import org.springframework.web.servlet.ModelAndView;

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

public class LoginInterceptor implements HandlerInterceptor {
   
//操作前就进行拦截处理
 public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        //获取当前请求的路径
        String url = httpServletRequest.getRequestURI();
       //将login转换为小写再进行比较 存在则返回true
        if(url.toLowerCase().indexOf("login")>=0){
            return true;
        }
       //使用session判断之前是否已经登录
        HttpSession session = httpServletRequest.getSession();
        if(session.getAttribute("employee")!=null){
            return true;
        }
        //重定向到登录页面进行登录操作
        httpServletResponse.sendRedirect("/to_login");
        return false;
    }
//
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

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

    }
}

登录拦截的springmvc.xml配置

 <mvc:interceptors>
        <mvc:interceptor>
            //拦截所有请求
            <mvc:mapping path="/**"/>
            <bean class="拦截器类在项目中的位置例如com.oa.LoginInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>

来源：CSDN

作者：Eisou7

链接：https://blog.csdn.net/quhaha/article/details/103844898

标签

springmvc配置

modelandview