LoginInterceptor 登录拦截器样例

整合SSM框架全步骤目录
LoginInterceptor.java

package com.star.utils;

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

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

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: Star Chou
 * @Date: 2022/02/28/8:35
 * @Description:
 */

// 登陆的拦截器
public class LoginInterceptor implements HandlerInterceptor {

    // 处理请求前
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        if(session.getAttribute("uname")==null || "".equals(session.getAttribute("uname"))){
            request.getRequestDispatcher("/user/toLogin").forward(request, response);
            return false;
        }
        return true;
    }
}